Today's Message Index:
----------------------
1. 04:26 AM - M14P mag coils (YAk52) (Nigel Willson)
2. 04:53 AM - Re: M14P mag coils (YAk52) (Pedro Cerveira Pinto)
3. 05:23 AM - Re: Yak52 - Prop/Governor problem - help/advice needed (=?UTF-8?B?VHJvbmQgU8O4cmfDpXJk?=)
4. 05:25 AM - Re: Yak52 - Prop/Governor problem - help/advice needed (=?UTF-8?B?VHJvbmQgU8O4cmfDpXJk?=)
5. 06:14 AM - Re: M14P mag coils (YAk52) (Richard Goode)
6. 06:20 AM - Re: Yak52 - Prop/Governor problem - help/advice needed (Richard Goode)
7. 06:20 AM - Re: Yak52 - Prop/Governor problem - help/advice needed (A. Dennis Savarese)
8. 06:58 AM - Re: Yak52 - Prop/Governor problem - help/advice needed (Nigel Willson)
9. 08:01 AM - Re: M14P mag coils (YAk52) (Bitterlich, Mark G CIV NAVAIR, WD)
10. 08:35 AM - Re: M14P mag coils (YAk52) (Nigel Willson)
11. 08:52 AM - Re: M14P mag coils (YAk52) (A. Dennis Savarese)
12. 09:09 AM - Re: M14P mag coils (YAk52) (Nigel Willson)
13. 09:22 AM - Re: M14P mag coils (YAk52) (Bitterlich, Mark G CIV NAVAIR, WD)
14. 09:23 AM - Re: M14P mag coils (YAk52) (Walter Lannon)
15. 09:30 AM - Re: M14P mag coils (YAk52) (Bitterlich, Mark G CIV NAVAIR, WD)
16. 09:50 AM - Re: M14P mag coils (YAk52) (A. Dennis Savarese)
17. 09:52 AM - Re: M14P mag coils (YAk52) (Nigel Willson)
18. 10:24 AM - Re: M14P mag coils (YAk52) (Nigel Willson)
19. 10:34 AM - Re: M14P mag coils (YAk52) (A. Dennis Savarese)
20. 02:57 PM - Re: M14P mag coils (YAk52) (Vic)
21. 05:42 PM - Re: M14P mag coils (YAk52) (Patrick Scofield)
Message 1
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| Subject: | M14P mag coils (YAk52) |
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc
. suggest changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the s
ame problem again on the replaced coil. (Everything else has been checked o
ut).
Discussions with various people seem to point to it being an "age" breakdow
n problem with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can
be used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or
, and alternative source of supply (Termikas tell me "not available" and
"unable to overhaul").
Thanks in advance everyone...
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com<mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com<http://yakdisplay.com/>
[Description: cid:image001.png@01C8A476.2E19D440]
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| Subject: | Re: M14P mag coils (YAk52) |
Maybe you want to try Aerometal Kft in Budapest.
They have changed one coil on my M-14
Regards
2015-07-27 12:22 GMT+01:00 Nigel Willson <nigel@yakdisplay.com>:
> Jill/All,
>
>
> Recent threads on the subject of mag problems and total cuts in flights
> etc. suggest changing the mag coil cures the problem.
>
>
> I=99ve recently changed one on my M14P Yak52, only to be presented
with the
> same problem again on the replaced coil. (Everything else has been checke
d
> out).
>
>
> Discussions with various people seem to point to it being an =9Dage
=9D
> breakdown problem with the coils rather than a =9Camount of use
=9D problem.
>
>
> So, the question is, does anyone have a supply of KNOWN GOOD coils that
> can be used as a replacement?
>
>
> If anyone DOES, can they let me know price including shipping to the UK?
> Or, and alternative source of supply (Termikas tell me =9Cnot ava
ilable=9D
> and =9Cunable to overhaul=9D).
>
>
> Thanks in advance everyone
>
>
> *Regards,*
>
> *Nigel Willson*
>
> *Flying Instructor/Examiner and Display Pilot*
>
> _________________________________________________
> * email*: *nigel@yakdisplay.com* <nigel@yakdisplay.com>
> *mobile*: (+44) 7809 116676
> *web*: http://yakdisplay.com
> [image: Description: cid:image001.png@01C8A476.2E19D440]
>
>
--
Pedro Cerveira Pinto
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| Subject: | Re: Yak52 - Prop/Governor problem - help/advice needed |
Hello George
I have had also some problems with my propeller cycling earlier, Moving the
prop lever to full course made no difference to RPM with me aswell.
But this was on the ground testing under run up.
I also has tapped into my cowl to check oil pressure in certain RPM handle
positions. I had 220PSI with RPM handle fully foward.
And 0 PSI approx. when handle in full Course(aft). As it should be.
When the oil gets warm... real warm, then its able to cycle.
After i changed oil it became much better, but still im not happy.the oil
needs to be real warm to cycle on ground run up.
And in aerobatic flights its not hundred prosent able to maintain RPM, lets
say in a loop.
George, what was the problem in your case? did you find it out?
I have a Hoffman Prop also. I bought my Yak-52W from you and Cliff, from a
former airline pilot in Washington. And you shipped it to me in Norway.
Any suggestion and thoughts?
Regards Trond S=C3=B8rg=C3=A5rd
Bergen, Norway.
2015-07-22 20:46 GMT+02:00 George Coy <george.coy@gmail.com>:
> When we had prop problems we could not figure out, I tapped into the oil
> line on the nose case and ran a 1/4 in hose to a pressure gauge and taped
> it to the cowl so I could see what was really happening with the oil
> pressure during flight. This was years ago when we were messing around wi
th
> Hoffman props.
> George
>
> On Wed, Jul 22, 2015 at 2:07 PM, Jan Mevis <jan.mevis@informavia.be>
> wrote:
>
>>
>> That's a very good advise George. We had recently some RPM problems on o
ur
>> Yak 52 because of that.
>>
>>
>> Jan
>>
>> On 22/07/15 19:47, "George S. Coy" <owner-yak-list-server@matronics.com
>> on
>> behalf of george.coy@gmail.com> wrote:
>>
>> >
>> >check the clamps that secure the cable housing.
>> >
>> >-----Original Message-----
>> >From: owner-yak-list-server@matronics.com
>> >[mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
>> >Sent: Wednesday, July 22, 2015 1:37 PM
>> >To: yak-list@matronics.com
>> >Subject: Yak-List: Yak52 - Prop/Governor problem - help/advice needed
>> >
>> >
>> >Asking the fount of all yak knowledge....
>> >
>> >Pre-take off checks prop cycle check all fine (70% down to 53% three
>> >times).
>> >On take-off, prop went to 110% and stayed there.
>> >Moving the prop lever to full course made no difference to RPM.
>> >
>> >Reduced power to bring RPM under control, abbreviated circuit and lande
d.
>> >
>> >Have changed to governor - but appears to still be a problem.
>> >
>> >Have had the prop off - and checked blades move freely, and oil is
>> >returned
>> >when blades are rotated.
>> >
>> >Drive to governor appears to be ok (rotates when prop is turned).
>> >
>> >Problem obviously appears to be when the prop is under load.
>> >
>> >Can anyone shed any light, experience of happening before?
>> >
>> >Clarification of my understanding would also be useful re what does wha
t
>> -
>> >i.e. oil pressure causes fine pitch, weights cause course pitch? In tha
t
>> >case, is it a governor drive problem when under load? IS there a weak
>> link
>> >in the drive system like the compressor?
>> >
>> >
>> >Any ideas?
>> >
>> >Regards,
>> >Nigel Willson
>> >Flying Instructor/Examiner and Display Pilot
>> >_________________________________________________
>> > email: nigel@yakdisplay.com
>> > mobile: (+44) 7809 116676
>> > web: http://yakdisplay.com
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>>
>>
>>
>> ==========
>> List" rel="noreferrer" target="_blank">
>> http://www.matronics.com/Navigator?Yak-List
>> ==========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contributi
on
>> ==========
>>
>>
>>
>>
>
>
> --
> George Coy
> CAS Ltd.
> 714 Airport Rd.
> Swanton VT 05488
> 802-868-5633 off
> 802-363-5782 cell
> george.coy@gmail.com
> http://coyafct.com/
> SKYPE george.coy
>
> *
>
===========
nics.com/Navigator?Yak-List>
===========
===========
om/contribution>
===========
>
> *
>
>
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| Subject: | Re: Yak52 - Prop/Governor problem - help/advice needed |
Im might add,
I have cheked the wire clamp, seems ok, and the governor is changed to a
new one, as i thought that might be it.
Trond
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| Subject: | M14P mag coils (YAk52) |
You say that the problem continued with a "new" coil - I suspect you have
anticipated the problem yourself in that I suspect the replacement coil was
also not working well.
After almost 30 years with these engines, I can say that almost any
high-tension ignition problem does come down to magneto coils or, on
occasions, the high-tension wiring.
Coils are a significant problem. M 14 P Inc are making new ones, as we in
Hungary. We know that ours are perfect, but our level of production is such
that we need to reserve most of them for our engine overhaul customers, but
can supply some to others if they want.
If anyone is interested, please come back to me off list.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
<http://www.russianaeros.com> www.russianaeros.com
I'm currently in Sri Lanka but this Mail is working,and my local phone is
+94 779 132 160.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 4:52 PM
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc.
suggest changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the
same problem again on the replaced coil. (Everything else has been checked
out).
Discussions with various people seem to point to it being an "age" breakdown
problem with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can
be used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or,
and alternative source of supply (Termikas tell me "not available" and
"unable to overhaul").
Thanks in advance everyone.
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: <mailto:nigel@yakdisplay.com> nigel@yakdisplay.com
mobile: (+44) 7809 116676
web: <http://yakdisplay.com/> http://yakdisplay.com
Description: cid:image001.png@01C8A476.2E19D440
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| Subject: | Yak52 - Prop/Governor problem - help/advice needed |
The Russian V-530 propeller needs 15 bar =93 pretty much your 220
PSI. However, the MT propeller needs 22 bar =93 around 330 PSI to
change pitch quickly. You achieve this with stronger pressure control
springs in the governor. I suspect that the same is true of the Hoffman.
Also, have you checked the oil filter going into the governor =93
if this is partially blocked, you will inevitably have pitch change
problems.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I=99m currently in Sri Lanka but this Mail is working,and my local
phone is +94 779 132 160.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Trond
S=C3=B8rg=C3=A5rd
Sent: Monday, July 27, 2015 5:49 PM
Subject: Re: Yak-List: Yak52 - Prop/Governor problem - help/advice
needed
Hello George
I have had also some problems with my propeller cycling earlier, Moving
the prop lever to full course made no difference to RPM with me aswell.
But this was on the ground testing under run up.
I also has tapped into my cowl to check oil pressure in certain RPM
handle positions. I had 220PSI with RPM handle fully foward.
And 0 PSI approx. when handle in full Course(aft). As it should be.
When the oil gets warm... real warm, then its able to cycle.
After i changed oil it became much better, but still im not happy.the
oil needs to be real warm to cycle on ground run up.
And in aerobatic flights its not hundred prosent able to maintain RPM,
lets say in a loop.
George, what was the problem in your case? did you find it out?
I have a Hoffman Prop also. I bought my Yak-52W from you and Cliff, from
a former airline pilot in Washington. And you shipped it to me in
Norway.
Any suggestion and thoughts?
Regards Trond S=C3=B8rg=C3=A5rd
Bergen, Norway.
2015-07-22 20:46 GMT+02:00 George Coy <george.coy@gmail.com>:
When we had prop problems we could not figure out, I tapped into the oil
line on the nose case and ran a 1/4 in hose to a pressure gauge and
taped it to the cowl so I could see what was really happening with the
oil pressure during flight. This was years ago when we were messing
around with Hoffman props.
George
On Wed, Jul 22, 2015 at 2:07 PM, Jan Mevis <jan.mevis@informavia.be>
wrote:
That's a very good advise George. We had recently some RPM problems on
our
Yak 52 because of that.
Jan
On 22/07/15 19:47, "George S. Coy" <owner-yak-list-server@matronics.com
on
behalf of george.coy@gmail.com> wrote:
>
>check the clamps that secure the cable housing.
>
>-----Original Message-----
>From: owner-yak-list-server@matronics.com
>[mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
>Sent: Wednesday, July 22, 2015 1:37 PM
>To: yak-list@matronics.com
>Subject: Yak-List: Yak52 - Prop/Governor problem - help/advice needed
>
>
>Asking the fount of all yak knowledge....
>
>Pre-take off checks prop cycle check all fine (70% down to 53% three
>times).
>On take-off, prop went to 110% and stayed there.
>Moving the prop lever to full course made no difference to RPM.
>
>Reduced power to bring RPM under control, abbreviated circuit and
landed.
>
>Have changed to governor - but appears to still be a problem.
>
>Have had the prop off - and checked blades move freely, and oil is
>returned
>when blades are rotated.
>
>Drive to governor appears to be ok (rotates when prop is turned).
>
>Problem obviously appears to be when the prop is under load.
>
>Can anyone shed any light, experience of happening before?
>
>Clarification of my understanding would also be useful re what does
what -
>i.e. oil pressure causes fine pitch, weights cause course pitch? In
that
>case, is it a governor drive problem when under load? IS there a weak
link
>in the drive system like the compressor?
>
>
>Any ideas?
>
>Regards,
>Nigel Willson
>Flying Instructor/Examiner and Display Pilot
>_________________________________________________
> email: nigel@yakdisplay.com
> mobile: (+44) 7809 116676 <tel:%28%2B44%29%207809%20116676>
> web: http://yakdisplay.com
>
>
List" rel="noreferrer"
target="_blank">http://www.matronics.com/Navigator?Yak-List
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
b Site -
-Matt Dralle, List Admin.
rel="noreferrer"
target="_blank">http://www.matronics.com/contribution
--
George Coy
CAS Ltd.
714 Airport Rd.
Swanton VT 05488
802-868-5633 off
802-363-5782 cell
george.coy@gmail.com
http://coyafct.com/
SKYPE george.coy
et="_blank">http://www.matronics.com/Navigator?Yak-List
tp://forums.matronics.com
_blank">http://www.matronics.com/contribution
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| Subject: | Re: Yak52 - Prop/Governor problem - help/advice needed |
Many times I have seen where the prop governor armis improperly
positioned. Not the stops. The position of the arm in relation to the
rotating shaft is critical. If the preload position of the rotating
shaft is incorrect (where the arm is attached along with the serrated
sleeve), it willcause the prop blades not to move to either full fine or
full coarse pitch. Proper adjustment procedure is in the M14 maintenance
manual.
Attached is the applicable task card.
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 7:22 AM, Trond Srgrd wrote:
> Im might add,
> I have cheked the wire clamp, seems ok, and the governor is changed to
> a new one, as i thought that might be it.
>
> Trond
> http://www.matronics.com/contribution
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| Subject: | Re: Yak52 - Prop/Governor problem - help/advice needed |
Turned out to be a slipping gasket blocking the oil return hole to the gall
ery.....
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
Subject: Yak-List: Yak52 - Prop/Governor problem - help/advice needed
Many times I have seen where the prop governor armis improperly
positioned. Not the stops. The position of the arm in relation to the
rotating shaft is critical. If the preload position of the rotating
shaft is incorrect (where the arm is attached along with the serrated
sleeve), it willcause the prop blades not to move to either full fine or
full coarse pitch. Proper adjustment procedure is in the M14 maintenance
manual.
Attached is the applicable task card.
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com<http://www.yak-52.com>
Skype - Yakguy1
On 7/27/2015 7:22 AM, Trond S=F8rg=E5rd wrote:
> Im might add,
> I have cheked the wire clamp, seems ok, and the governor is changed to
> a new one, as i thought that might be it.
>
> Trond
> http://www.matronics.com/contribution
Message 9
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| Subject: | M14P mag coils (YAk52) |
None of my business Nigel, but if you don't mind I'd like to ask a question.
Assuming your engine is having "total cuts in flight", and you know which mag you
think is causing the problem, have you ever turned that mag completely OFF
with the mag switch and tested to see if the condition continues?
And another suggestion that may sound rather dumb, but ...... .
I have seen the wiring to the mag switch reversed on more than one occasion. This
obviously can lead the owner to think the wrong mag is bad. Simply put an
ohm-meter on the P lead and check to see which switch position grounds it JUST
TO BE SURE.
My 2 cents only.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Monday, July 27, 2015 9:11 AM
Subject: RE: Yak-List: M14P mag coils (YAk52)
You say that the problem continued with a "new" coil - I suspect you have anticipated
the problem yourself in that I suspect the replacement coil was also not
working well.
After almost 30 years with these engines, I can say that almost any high-tension
ignition problem does come down to magneto coils or, on occasions, the high-tension
wiring.
Coils are a significant problem. M 14 P Inc are making new ones, as we in Hungary.
We know that ours are perfect, but our level of production is such that we
need to reserve most of them for our engine overhaul customers, but can supply
some to others if they want.
If anyone is interested, please come back to me off list.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com <http://www.russianaeros.com>
I'm currently in Sri Lanka but this Mail is working,and my local phone is +94 779
132 160.
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 4:52 PM
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc. suggest
changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the same
problem again on the replaced coil. (Everything else has been checked out).
Discussions with various people seem to point to it being an "age" breakdown problem
with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can be
used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or, and
alternative source of supply (Termikas tell me "not available" and "unable
to overhaul").
Thanks in advance everyone...
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com <http://yakdisplay.com/>
Description: cid:image001.png@01C8A476.2E19D440
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Message 10
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| Subject: | Re: M14P mag coils (YAk52) |
Thanks Mark. Yes, p-leads have been traced to ensure correct mag was looked
at. And when I say total cut, I had a rough engine, and selected mags indi
vidually in flight to see which was causing the problem. On mag2, got a tot
al cut. Mag1 ran fine.
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
Subject: Yak-List: M14P mag coils (YAk52)
itterlich@navy.mil>
None of my business Nigel, but if you don't mind I'd like to ask a question
.
Assuming your engine is having "total cuts in flight", and you know which m
ag you think is causing the problem, have you ever turned that mag complete
ly OFF with the mag switch and tested to see if the condition continues?
And another suggestion that may sound rather dumb, but ...... .
I have seen the wiring to the mag switch reversed on more than one occasion
. This obviously can lead the owner to think the wrong mag is bad. Simpl
y put an ohm-meter on the P lead and check to see which switch position gro
unds it JUST TO BE SURE.
My 2 cents only.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@mat
ronics.com] On Behalf Of Richard Goode
Sent: Monday, July 27, 2015 9:11 AM
Subject: RE: Yak-List: M14P mag coils (YAk52)
You say that the problem continued with a "new" coil - I suspect you have a
nticipated the problem yourself in that I suspect the replacement coil was
also not working well.
After almost 30 years with these engines, I can say that almost any high-te
nsion ignition problem does come down to magneto coils or, on occasions, th
e high-tension wiring.
Coils are a significant problem. M 14 P Inc are making new ones, as we in H
ungary. We know that ours are perfect, but our level of production is such
that we need to reserve most of them for our engine overhaul customers, but
can supply some to others if they want.
If anyone is interested, please come back to me off list.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com<http://www.russianaeros.com> <http://www.russianaeros.
com>
I'm currently in Sri Lanka but this Mail is working,and my local phone is +
94 779 132 160.
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@mat
ronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 4:52 PM
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc
. suggest changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the s
ame problem again on the replaced coil. (Everything else has been checked o
ut).
Discussions with various people seem to point to it being an "age" breakdow
n problem with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can
be used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or
, and alternative source of supply (Termikas tell me "not available" and
"unable to overhaul").
Thanks in advance everyone...
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com <http://yakdisplay.com/>
Description: cid:image001.png@01C8A476.2E19D440
--
This message has been scanned for viruses and dangerous content by MailScan
ner <http://www.mailscanner.info/> , and is believed to be clean.
Message 11
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|
| Subject: | Re: M14P mag coils (YAk52) |
Nigel,
Did you verify the points are opening and closing properly and set to
.25-.35mm? See if the foot of the points is still there and not worn
down to where it does not contact the point cam. Poor lubrication of
the cam causes the foot to wear significantly. If the points are not
opening, the mag will not fire.
Did you check the high voltage stick to make sure it was not arcing to
ground on the side of it? Sometimes the high voltage stick is cracked.
Especially right around the part of the stick that is protruding just
above the hole in fits into. If it cracks, the voltage from the coil
will never make it to the cap because it is arcing to ground.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 10:31 AM, Nigel Willson wrote:
> Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> looked at. And when I say total cut, I had a rough engine, and
> selected mags individually in flight to see which was causing the
> problem. On mag2, got a total cut. Mag1 ran fine.
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 16:20
>
> <mark.bitterlich@navy.mil>
>
> None of my business Nigel, but if you don't mind I'd like to ask a
> question.
>
> Assuming your engine is having "total cuts in flight", and you know
> which mag you think is causing the problem, have you ever turned that
> mag completely OFF with the mag switch and tested to see if the
> condition continues?
>
> And another suggestion that may sound rather dumb, but ...... .
>
> I have seen the wiring to the mag switch reversed on more than one
> occasion. This obviously can lead the owner to think the wrong mag is
> bad. Simply put an ohm-meter on the P lead and check to see which
> switch position grounds it JUST TO BE SURE.
>
> My 2 cents only.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Monday, July 27, 2015 9:11 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: M14P mag coils (YAk52)
>
> You say that the problem continued with a "new" coil - I suspect you
> have anticipated the problem yourself in that I suspect the
> replacement coil was also not working well.
>
>
> After almost 30 years with these engines, I can say that almost any
> high-tension ignition problem does come down to magneto coils or, on
> occasions, the high-tension wiring.
>
>
> Coils are a significant problem. M 14 P Inc are making new ones, as we
> in Hungary. We know that ours are perfect, but our level of production
> is such that we need to reserve most of them for our engine overhaul
> customers, but can supply some to others if they want.
>
>
> If anyone is interested, please come back to me off list.
>
>
> Richard Goode
>
>
> Rhodds Farm
>
> Lyonshall
>
> Hereford
>
> HR5 3LW
>
> United Kingdom
>
> Tel: +94 (0) 81 241 5137 (Sri Lanka)
>
> Tel: +44 (0) 1544 340120
>
> Fax: +44 (0) 1544 340129
>
> www.russianaeros.com <http://www.russianaeros.com>
> <http://www.russianaeros.com>
>
> I'm currently in Sri Lanka but this Mail is working,and my local phone
> is +94 779 132 160.
>
>
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
> Sent: Monday, July 27, 2015 4:52 PM
> To: info@m-14p.com; yak-list@matronics.com
> Subject: Yak-List: M14P mag coils (YAk52)
>
>
> Jill/All,
>
>
> Recent threads on the subject of mag problems and total cuts in
> flights etc. suggest changing the mag coil cures the problem.
>
>
> I've recently changed one on my M14P Yak52, only to be presented with
> the same problem again on the replaced coil. (Everything else has been
> checked out).
>
>
> Discussions with various people seem to point to it being an "age"
> breakdown problem with the coils rather than a "amount of use" problem.
>
>
> So, the question is, does anyone have a supply of KNOWN GOOD coils
> that can be used as a replacement?
>
>
> If anyone DOES, can they let me know price including shipping to the
> UK? Or, and alternative source of supply (Termikas tell me "not
> available" and "unable to overhaul").
>
>
> Thanks in advance everyone...
>
>
> Regards,
>
> Nigel Willson
>
> Flying Instructor/Examiner and Display Pilot
>
> _________________________________________________
> email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> mobile: (+44) 7809 116676
> web: http://yakdisplay.com <http://yakdisplay.com/>
> Description: cid:image001.png@01C8A476.2E19D440
>
>
> --
> This message has been scanned for viruses and dangerous content by
> MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
>
>
> ==========
> Email Forum -
> List">http://www.matronics.com/Navigator?Yak-List
> ==========
> p; - MATRONICS WEB FORUMS -
> ums.matronics.com
> ==========
> p; - List Contribution Web Site -
> p; -Matt Dralle, List Admin.
> http://www.matronics.com/contribution
> ==========
>
>
> http://www.matronics.com/contribution
Message 12
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|
| Subject: | Re: M14P mag coils (YAk52) |
Thanks Dennis. Will pass it on to the maintenance guys. I suspect they have
checked these things already though. They have been looking after yams for
years. The problem has been intermittent so far, except for the last fligh
t. Strangely after a coil change...
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
Subject: Yak-List: M14P mag coils (YAk52)
th.net>
Nigel,
Did you verify the points are opening and closing properly and set to
.25-.35mm? See if the foot of the points is still there and not worn
down to where it does not contact the point cam. Poor lubrication of
the cam causes the foot to wear significantly. If the points are not
opening, the mag will not fire.
Did you check the high voltage stick to make sure it was not arcing to
ground on the side of it? Sometimes the high voltage stick is cracked.
Especially right around the part of the stick that is protruding just
above the hole in fits into. If it cracks, the voltage from the coil
will never make it to the cap because it is arcing to ground.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com<http://www.yak-52.com>
Skype - Yakguy1
On 7/27/2015 10:31 AM, Nigel Willson wrote:
> Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> looked at. And when I say total cut, I had a rough engine, and
> selected mags individually in flight to see which was causing the
> problem. On mag2, got a total cut. Mag1 ran fine.
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 16:20
>
> <mark.bitterlich@navy.mil>
>
> None of my business Nigel, but if you don't mind I'd like to ask a
> question.
>
> Assuming your engine is having "total cuts in flight", and you know
> which mag you think is causing the problem, have you ever turned that
> mag completely OFF with the mag switch and tested to see if the
> condition continues?
>
> And another suggestion that may sound rather dumb, but ...... .
>
> I have seen the wiring to the mag switch reversed on more than one
> occasion. This obviously can lead the owner to think the wrong mag is
> bad. Simply put an ohm-meter on the P lead and check to see which
> switch position grounds it JUST TO BE SURE.
>
> My 2 cents only.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> Sent: Monday, July 27, 2015 9:11 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: M14P mag coils (YAk52)
>
> You say that the problem continued with a "new" coil - I suspect you
> have anticipated the problem yourself in that I suspect the
> replacement coil was also not working well.
>
>
> After almost 30 years with these engines, I can say that almost any
> high-tension ignition problem does come down to magneto coils or, on
> occasions, the high-tension wiring.
>
>
> Coils are a significant problem. M 14 P Inc are making new ones, as we
> in Hungary. We know that ours are perfect, but our level of production
> is such that we need to reserve most of them for our engine overhaul
> customers, but can supply some to others if they want.
>
>
> If anyone is interested, please come back to me off list.
>
>
> Richard Goode
>
>
> Rhodds Farm
>
> Lyonshall
>
> Hereford
>
> HR5 3LW
>
> United Kingdom
>
> Tel: +94 (0) 81 241 5137 (Sri Lanka)
>
> Tel: +44 (0) 1544 340120
>
> Fax: +44 (0) 1544 340129
>
> www.russianaeros.com<http://www.russianaeros.com> <http://www.russianaero
s.com>
> <http://www.russianaeros.com>
>
> I'm currently in Sri Lanka but this Mail is working,and my local phone
> is +94 779 132 160.
>
>
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
> Sent: Monday, July 27, 2015 4:52 PM
> To: info@m-14p.com; yak-list@matronics.com
> Subject: Yak-List: M14P mag coils (YAk52)
>
>
> Jill/All,
>
>
> Recent threads on the subject of mag problems and total cuts in
> flights etc. suggest changing the mag coil cures the problem.
>
>
> I've recently changed one on my M14P Yak52, only to be presented with
> the same problem again on the replaced coil. (Everything else has been
> checked out).
>
>
> Discussions with various people seem to point to it being an "age"
> breakdown problem with the coils rather than a "amount of use" problem.
>
>
> So, the question is, does anyone have a supply of KNOWN GOOD coils
> that can be used as a replacement?
>
>
> If anyone DOES, can they let me know price including shipping to the
> UK? Or, and alternative source of supply (Termikas tell me "not
> available" and "unable to overhaul").
>
>
> Thanks in advance everyone...
>
>
> Regards,
>
> Nigel Willson
>
> Flying Instructor/Examiner and Display Pilot
>
> _________________________________________________
> email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> mobile: (+44) 7809 116676
> web: http://yakdisplay.com <http://yakdisplay.com/>
> Description: cid:image001.png@01C8A476.2E19D440
>
>
> --
> This message has been scanned for viruses and dangerous content by
> MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
>
>
> ==========
> Email Forum -
> List">http://www.matronics.com/Navigator?Yak-List
> ==========
> p; - MATRONICS WEB FORUMS -
> ums.matronics.com
> ==========
> p; - List Contribution Web Site -
> p; -Matt Dralle, List Admin.
> http://www.matronics.com/contribution
> ==========
>
>
> http://www.matronics.com/contribution
Message 13
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| Subject: | M14P mag coils (YAk52) |
Thanks! Perfect!
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 11:32 AM
Subject: Re: Yak-List: M14P mag coils (YAk52)
Thanks Mark. Yes, p-leads have been traced to ensure correct mag was looked at.
And when I say total cut, I had a rough engine, and selected mags individually
in flight to see which was causing the problem. On mag2, got a total cut. Mag1
ran fine.
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
Subject: Yak-List: M14P mag coils (YAk52)
--> <mark.bitterlich@navy.mil>
None of my business Nigel, but if you don't mind I'd like to ask a question.
Assuming your engine is having "total cuts in flight", and you know which mag you
think is causing the problem, have you ever turned that mag completely OFF
with the mag switch and tested to see if the condition continues?
And another suggestion that may sound rather dumb, but ...... .
I have seen the wiring to the mag switch reversed on more than one occasion. This
obviously can lead the owner to think the wrong mag is bad. Simply put an
ohm-meter on the P lead and check to see which switch position grounds it JUST
TO BE SURE.
My 2 cents only.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Monday, July 27, 2015 9:11 AM
Subject: RE: Yak-List: M14P mag coils (YAk52)
You say that the problem continued with a "new" coil - I suspect you have anticipated
the problem yourself in that I suspect the replacement coil was also not
working well.
After almost 30 years with these engines, I can say that almost any high-tension
ignition problem does come down to magneto coils or, on occasions, the high-tension
wiring.
Coils are a significant problem. M 14 P Inc are making new ones, as we in Hungary.
We know that ours are perfect, but our level of production is such that we
need to reserve most of them for our engine overhaul customers, but can supply
some to others if they want.
If anyone is interested, please come back to me off list.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com <http://www.russianaeros.com>
I'm currently in Sri Lanka but this Mail is working,and my local phone is +94 779
132 160.
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 4:52 PM
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc. suggest
changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the same
problem again on the replaced coil. (Everything else has been checked out).
Discussions with various people seem to point to it being an "age" breakdown problem
with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can be
used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or, and
alternative source of supply (Termikas tell me "not available" and "unable
to overhaul").
Thanks in advance everyone...
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com <http://yakdisplay.com/>
Description: cid:image001.png@01C8A476.2E19D440
--
This message has been scanned for viruses and dangerous content by MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
==========
Email Forum -
List">http://www.matronics.com/Navigator?Yak-List
==========
p; - MATRONICS WEB FORUMS -
ums.matronics.com
==========
p; - List Contribution Web Site -
p; -Matt Dralle, List Admin.
http://www.matronics.com/contribution
==========
Message 14
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|
| Subject: | Re: M14P mag coils (YAk52) |
Advice worth much more than 2 cents.
In 60 years of engine maintenance this is a fairly common occurrence. When
you suspect a mag problem confirming location has to be the first task.
Walt
-----Original Message-----
From: Bitterlich, Mark G CIV NAVAIR, WD
Sent: Monday, July 27, 2015 7:57 AM
Subject: RE: Yak-List: M14P mag coils (YAk52)
<mark.bitterlich@navy.mil>
None of my business Nigel, but if you don't mind I'd like to ask a question.
Assuming your engine is having "total cuts in flight", and you know which
mag you think is causing the problem, have you ever turned that mag
completely OFF with the mag switch and tested to see if the condition
continues?
And another suggestion that may sound rather dumb, but ...... .
I have seen the wiring to the mag switch reversed on more than one occasion.
This obviously can lead the owner to think the wrong mag is bad. Simply
put an ohm-meter on the P lead and check to see which switch position
grounds it JUST TO BE SURE.
My 2 cents only.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
Sent: Monday, July 27, 2015 9:11 AM
Subject: RE: Yak-List: M14P mag coils (YAk52)
You say that the problem continued with a "new" coil - I suspect you have
anticipated the problem yourself in that I suspect the replacement coil was
also not working well.
After almost 30 years with these engines, I can say that almost any
high-tension ignition problem does come down to magneto coils or, on
occasions, the high-tension wiring.
Coils are a significant problem. M 14 P Inc are making new ones, as we in
Hungary. We know that ours are perfect, but our level of production is such
that we need to reserve most of them for our engine overhaul customers, but
can supply some to others if they want.
If anyone is interested, please come back to me off list.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com <http://www.russianaeros.com>
I'm currently in Sri Lanka but this Mail is working,and my local phone is
+94 779 132 160.
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 4:52 PM
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc.
suggest changing the mag coil cures the problem.
I've recently changed one on my M14P Yak52, only to be presented with the
same problem again on the replaced coil. (Everything else has been checked
out).
Discussions with various people seem to point to it being an "age" breakdown
problem with the coils rather than a "amount of use" problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can
be used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or,
and alternative source of supply (Termikas tell me "not available" and
"unable to overhaul").
Thanks in advance everyone...
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com <http://yakdisplay.com/>
Description: cid:image001.png@01C8A476.2E19D440
--
This message has been scanned for viruses and dangerous content by
MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
Message 15
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|
| Subject: | M14P mag coils (YAk52) |
Nigel, I have to concur with Dennis, it is kind of logical that if you change
the coil and have the exact same problem, it might be something else.
He pointed out the two "logical something else's" that I was getting ready to say.
Other than those two ... the only other weird thing I have seen is the
actual P lead wire that was under a tie wrap that cut into it and caused the P
lead to short to ground with engine vibration. That one was extremely tough
to find.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 12:06 PM
Subject: Re: Yak-List: M14P mag coils (YAk52)
Thanks Dennis. Will pass it on to the maintenance guys. I suspect they have checked
these things already though. They have been looking after yams for years.
The problem has been intermittent so far, except for the last flight. Strangely
after a coil change...
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
Subject: Yak-List: M14P mag coils (YAk52)
--> <dsavarese0812@bellsouth.net>
Nigel,
Did you verify the points are opening and closing properly and set to .25-.35mm?
See if the foot of the points is still there and not worn down to where it
does not contact the point cam. Poor lubrication of the cam causes the foot to
wear significantly. If the points are not opening, the mag will not fire.
Did you check the high voltage stick to make sure it was not arcing to ground on
the side of it? Sometimes the high voltage stick is cracked.
Especially right around the part of the stick that is protruding just above the
hole in fits into. If it cracks, the voltage from the coil will never make it
to the cap because it is arcing to ground.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 10:31 AM, Nigel Willson wrote:
> Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> looked at. And when I say total cut, I had a rough engine, and
> selected mags individually in flight to see which was causing the
> problem. On mag2, got a total cut. Mag1 ran fine.
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 16:20
>
> <mark.bitterlich@navy.mil>
>
> None of my business Nigel, but if you don't mind I'd like to ask a
> question.
>
> Assuming your engine is having "total cuts in flight", and you know
> which mag you think is causing the problem, have you ever turned that
> mag completely OFF with the mag switch and tested to see if the
> condition continues?
>
> And another suggestion that may sound rather dumb, but ...... .
>
> I have seen the wiring to the mag switch reversed on more than one
> occasion. This obviously can lead the owner to think the wrong mag is
> bad. Simply put an ohm-meter on the P lead and check to see which
> switch position grounds it JUST TO BE SURE.
>
> My 2 cents only.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard
> Goode
> Sent: Monday, July 27, 2015 9:11 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: M14P mag coils (YAk52)
>
> You say that the problem continued with a "new" coil - I suspect you
> have anticipated the problem yourself in that I suspect the
> replacement coil was also not working well.
>
>
> After almost 30 years with these engines, I can say that almost any
> high-tension ignition problem does come down to magneto coils or, on
> occasions, the high-tension wiring.
>
>
> Coils are a significant problem. M 14 P Inc are making new ones, as we
> in Hungary. We know that ours are perfect, but our level of production
> is such that we need to reserve most of them for our engine overhaul
> customers, but can supply some to others if they want.
>
>
> If anyone is interested, please come back to me off list.
>
>
> Richard Goode
>
>
> Rhodds Farm
>
> Lyonshall
>
> Hereford
>
> HR5 3LW
>
> United Kingdom
>
> Tel: +94 (0) 81 241 5137 (Sri Lanka)
>
> Tel: +44 (0) 1544 340120
>
> Fax: +44 (0) 1544 340129
>
> www.russianaeros.com <http://www.russianaeros.com>
> <http://www.russianaeros.com>
>
> I'm currently in Sri Lanka but this Mail is working,and my local phone
> is +94 779 132 160.
>
>
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel
> Willson
> Sent: Monday, July 27, 2015 4:52 PM
> To: info@m-14p.com; yak-list@matronics.com
> Subject: Yak-List: M14P mag coils (YAk52)
>
>
> Jill/All,
>
>
> Recent threads on the subject of mag problems and total cuts in
> flights etc. suggest changing the mag coil cures the problem.
>
>
> I've recently changed one on my M14P Yak52, only to be presented with
> the same problem again on the replaced coil. (Everything else has been
> checked out).
>
>
> Discussions with various people seem to point to it being an "age"
> breakdown problem with the coils rather than a "amount of use" problem.
>
>
> So, the question is, does anyone have a supply of KNOWN GOOD coils
> that can be used as a replacement?
>
>
> If anyone DOES, can they let me know price including shipping to the
> UK? Or, and alternative source of supply (Termikas tell me "not
> available" and "unable to overhaul").
>
>
> Thanks in advance everyone...
>
>
> Regards,
>
> Nigel Willson
>
> Flying Instructor/Examiner and Display Pilot
>
> _________________________________________________
> email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> mobile: (+44) 7809 116676
> web: http://yakdisplay.com <http://yakdisplay.com/>
> Description: cid:image001.png@01C8A476.2E19D440
>
>
> --
> This message has been scanned for viruses and dangerous content by
> MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
>
>
> ==========
> Email Forum -
> List">http://www.matronics.com/Navigator?Yak-List
> ==========
> p; - MATRONICS WEB FORUMS -
> ums.matronics.com
> ==========
> p; - List Contribution Web Site -
> p; -Matt Dralle, List Admin.
> http://www.matronics.com/contribution
> ==========
>
>
> http://www.matronics.com/contribution
==========
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Message 16
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| Subject: | Re: M14P mag coils (YAk52) |
I'm not saying that what I'm about to say defines the problem. But when
a coil is replaced, thetop contact in the coil touches the high voltage
stick. Plus the wire from the coil is passed up through a hole and
affixed to the block right next to the stick. It is possible the stick
moved ever so slightly and is now arcing to ground.
Also, it could be the foot on the points has finally worn down to where
the foot no longer rubs on the cam. As previously stated, if the points
don't open, coil not work-ee. :-)
Why not just replace the high voltage stick just for grins and see what
happens? BTW, don'tput your finger on it to test it while someone
rotates the prop. You might earn a Darwin award if you did.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 11:06 AM, Nigel Willson wrote:
> Thanks Dennis. Will pass it on to the maintenance guys. I suspect they
> have checked these things already though. They have been looking after
> yams for years. The problem has been intermittent so far, except for
> the last flight. Strangely after a coil change...
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 17:03
>
> <dsavarese0812@bellsouth.net>
>
> Nigel,
> Did you verify the points are opening and closing properly and set to
> .25-.35mm? See if the foot of the points is still there and not worn
> down to where it does not contact the point cam. Poor lubrication of
> the cam causes the foot to wear significantly. If the points are not
> opening, the mag will not fire.
>
> Did you check the high voltage stick to make sure it was not arcing to
> ground on the side of it? Sometimes the high voltage stick is cracked.
> Especially right around the part of the stick that is protruding just
> above the hole in fits into. If it cracks, the voltage from the coil
> will never make it to the cap because it is arcing to ground.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 (mobile)
> www.yak-52.com <http://www.yak-52.com>
> Skype - Yakguy1
>
> On 7/27/2015 10:31 AM, Nigel Willson wrote:
> > Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> > looked at. And when I say total cut, I had a rough engine, and
> > selected mags individually in flight to see which was causing the
> > problem. On mag2, got a total cut. Mag1 ran fine.
> >
> > Regards,
> >
> > Nigel Willson
> > Flying Instructor / Examiner
> > Display Pilot
> >
> > Tel. 07809 116676
> > Web. yakdisplay.com
> >
> > Sent from my HTC One mini 2
> >
> > ----- Reply message -----
> > From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> > To: "yak-list@matronics.com" <yak-list@matronics.com>
> > Subject: Yak-List: M14P mag coils (YAk52)
> > Date: Mon, Jul 27, 2015 16:20
> >
> > <mark.bitterlich@navy.mil>
> >
> > None of my business Nigel, but if you don't mind I'd like to ask a
> > question.
> >
> > Assuming your engine is having "total cuts in flight", and you know
> > which mag you think is causing the problem, have you ever turned that
> > mag completely OFF with the mag switch and tested to see if the
> > condition continues?
> >
> > And another suggestion that may sound rather dumb, but ...... .
> >
> > I have seen the wiring to the mag switch reversed on more than one
> > occasion. This obviously can lead the owner to think the wrong mag is
> > bad. Simply put an ohm-meter on the P lead and check to see which
> > switch position grounds it JUST TO BE SURE.
> >
> > My 2 cents only.
> >
> > Mark
> >
> >
> > -----Original Message-----
> > From: owner-yak-list-server@matronics.com
> > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard Goode
> > Sent: Monday, July 27, 2015 9:11 AM
> > To: yak-list@matronics.com
> > Subject: RE: Yak-List: M14P mag coils (YAk52)
> >
> > You say that the problem continued with a "new" coil - I suspect you
> > have anticipated the problem yourself in that I suspect the
> > replacement coil was also not working well.
> >
> >
> >
> > After almost 30 years with these engines, I can say that almost any
> > high-tension ignition problem does come down to magneto coils or, on
> > occasions, the high-tension wiring.
> >
> >
> >
> > Coils are a significant problem. M 14 P Inc are making new ones, as we
> > in Hungary. We know that ours are perfect, but our level of production
> > is such that we need to reserve most of them for our engine overhaul
> > customers, but can supply some to others if they want.
> >
> >
> >
> > If anyone is interested, please come back to me off list.
> >
> >
> >
> > Richard Goode
> >
> >
> >
> > Rhodds Farm
> >
> > Lyonshall
> >
> > Hereford
> >
> > HR5 3LW
> >
> > United Kingdom
> >
> > Tel: +94 (0) 81 241 5137 (Sri Lanka)
> >
> > Tel: +44 (0) 1544 340120
> >
> > Fax: +44 (0) 1544 340129
> >
> > www.russianaeros.com <http://www.russianaeros.com>
> <http://www.russianaeros.com>
> > <http://www.russianaeros.com>
> >
> > I'm currently in Sri Lanka but this Mail is working,and my local phone
> > is +94 779 132 160.
> >
> >
> >
> > From: owner-yak-list-server@matronics.com
> > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
> > Sent: Monday, July 27, 2015 4:52 PM
> > To: info@m-14p.com; yak-list@matronics.com
> > Subject: Yak-List: M14P mag coils (YAk52)
> >
> >
> >
> > Jill/All,
> >
> >
> >
> > Recent threads on the subject of mag problems and total cuts in
> > flights etc. suggest changing the mag coil cures the problem.
> >
> >
> >
> > I've recently changed one on my M14P Yak52, only to be presented with
> > the same problem again on the replaced coil. (Everything else has been
> > checked out).
> >
> >
> >
> > Discussions with various people seem to point to it being an "age"
> > breakdown problem with the coils rather than a "amount of use" problem.
> >
> >
> >
> > So, the question is, does anyone have a supply of KNOWN GOOD coils
> > that can be used as a replacement?
> >
> >
> >
> > If anyone DOES, can they let me know price including shipping to the
> > UK? Or, and alternative source of supply (Termikas tell me "not
> > available" and "unable to overhaul").
> >
> >
> >
> > Thanks in advance everyone...
> >
> >
> >
> > Regards,
> >
> > Nigel Willson
> >
> > Flying Instructor/Examiner and Display Pilot
> >
> > _________________________________________________
> > email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> > mobile: (+44) 7809 116676
> > web: http://yakdisplay.com <http://yakdisplay.com/>
> > Description: cid:image001.png@01C8A476.2E19D440
> >
> >
> >
> >
> > --
> > This message has been scanned for viruses and dangerous content by
> > MailScanner <http://www.mailscanner.info/> , and is believed to be
> clean.
> >
> >
> >
> > ==========
> > Email Forum -
> > List">http://www.matronics.com/Navigator?Yak-List
> > ==========
> > p; - MATRONICS WEB FORUMS -
> > ums.matronics.com
> > ==========
> > p; - List Contribution Web Site -
> > p; -Matt Dralle, List Admin.
> > http://www.matronics.com/contribution
> > ==========
> >
> >
> >
> > http://www.matronics.com/contribution
>
>
> ==========
> Email Forum -
> List">http://www.matronics.com/Navigator?Yak-List
> ==========
> p; - MATRONICS WEB FORUMS -
> ums.matronics.com
> ==========
> p; - List Contribution Web Site -
> p; -Matt Dralle, List Admin.
> http://www.matronics.com/contribution
> ==========
>
>
> http://www.matronics.com/contribution
Message 17
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| Subject: | M14P mag coils (YAk52) |
All experiences welcome! Have passed it on! Thanks
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com
mobile: (+44) 7809 116676
web:http://yakdisplay.com
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G CIV NAVAIR, WD
Sent: 27 July 2015 17:25
Subject: RE: Yak-List: M14P mag coils (YAk52)
--> <mark.bitterlich@navy.mil>
Nigel, I have to concur with Dennis, it is kind of logical that if you change
the coil and have the exact same problem, it might be something else.
He pointed out the two "logical something else's" that I was getting ready to say.
Other than those two ... the only other weird thing I have seen is the
actual P lead wire that was under a tie wrap that cut into it and caused the P
lead to short to ground with engine vibration. That one was extremely tough
to find.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel Willson
Sent: Monday, July 27, 2015 12:06 PM
Subject: Re: Yak-List: M14P mag coils (YAk52)
Thanks Dennis. Will pass it on to the maintenance guys. I suspect they have checked
these things already though. They have been looking after yams for years.
The problem has been intermittent so far, except for the last flight. Strangely
after a coil change...
Regards,
Nigel Willson
Flying Instructor / Examiner
Display Pilot
Tel. 07809 116676
Web. yakdisplay.com
Sent from my HTC One mini 2
----- Reply message -----
From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
Subject: Yak-List: M14P mag coils (YAk52)
--> <dsavarese0812@bellsouth.net>
Nigel,
Did you verify the points are opening and closing properly and set to .25-.35mm?
See if the foot of the points is still there and not worn down to where it
does not contact the point cam. Poor lubrication of the cam causes the foot to
wear significantly. If the points are not opening, the mag will not fire.
Did you check the high voltage stick to make sure it was not arcing to ground on
the side of it? Sometimes the high voltage stick is cracked.
Especially right around the part of the stick that is protruding just above the
hole in fits into. If it cracks, the voltage from the coil will never make it
to the cap because it is arcing to ground.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 10:31 AM, Nigel Willson wrote:
> Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> looked at. And when I say total cut, I had a rough engine, and
> selected mags individually in flight to see which was causing the
> problem. On mag2, got a total cut. Mag1 ran fine.
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 16:20
>
> <mark.bitterlich@navy.mil>
>
> None of my business Nigel, but if you don't mind I'd like to ask a
> question.
>
> Assuming your engine is having "total cuts in flight", and you know
> which mag you think is causing the problem, have you ever turned that
> mag completely OFF with the mag switch and tested to see if the
> condition continues?
>
> And another suggestion that may sound rather dumb, but ...... .
>
> I have seen the wiring to the mag switch reversed on more than one
> occasion. This obviously can lead the owner to think the wrong mag is
> bad. Simply put an ohm-meter on the P lead and check to see which
> switch position grounds it JUST TO BE SURE.
>
> My 2 cents only.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard
> Goode
> Sent: Monday, July 27, 2015 9:11 AM
> To: yak-list@matronics.com
> Subject: RE: Yak-List: M14P mag coils (YAk52)
>
> You say that the problem continued with a "new" coil - I suspect you
> have anticipated the problem yourself in that I suspect the
> replacement coil was also not working well.
>
>
> After almost 30 years with these engines, I can say that almost any
> high-tension ignition problem does come down to magneto coils or, on
> occasions, the high-tension wiring.
>
>
> Coils are a significant problem. M 14 P Inc are making new ones, as we
> in Hungary. We know that ours are perfect, but our level of production
> is such that we need to reserve most of them for our engine overhaul
> customers, but can supply some to others if they want.
>
>
> If anyone is interested, please come back to me off list.
>
>
> Richard Goode
>
>
> Rhodds Farm
>
> Lyonshall
>
> Hereford
>
> HR5 3LW
>
> United Kingdom
>
> Tel: +94 (0) 81 241 5137 (Sri Lanka)
>
> Tel: +44 (0) 1544 340120
>
> Fax: +44 (0) 1544 340129
>
> www.russianaeros.com <http://www.russianaeros.com>
> <http://www.russianaeros.com>
>
> I'm currently in Sri Lanka but this Mail is working,and my local phone
> is +94 779 132 160.
>
>
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel
> Willson
> Sent: Monday, July 27, 2015 4:52 PM
> To: info@m-14p.com; yak-list@matronics.com
> Subject: Yak-List: M14P mag coils (YAk52)
>
>
> Jill/All,
>
>
> Recent threads on the subject of mag problems and total cuts in
> flights etc. suggest changing the mag coil cures the problem.
>
>
> I've recently changed one on my M14P Yak52, only to be presented with
> the same problem again on the replaced coil. (Everything else has been
> checked out).
>
>
> Discussions with various people seem to point to it being an "age"
> breakdown problem with the coils rather than a "amount of use" problem.
>
>
> So, the question is, does anyone have a supply of KNOWN GOOD coils
> that can be used as a replacement?
>
>
> If anyone DOES, can they let me know price including shipping to the
> UK? Or, and alternative source of supply (Termikas tell me "not
> available" and "unable to overhaul").
>
>
> Thanks in advance everyone...
>
>
> Regards,
>
> Nigel Willson
>
> Flying Instructor/Examiner and Display Pilot
>
> _________________________________________________
> email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> mobile: (+44) 7809 116676
> web: http://yakdisplay.com <http://yakdisplay.com/>
> Description: cid:image001.png@01C8A476.2E19D440
>
>
> --
> This message has been scanned for viruses and dangerous content by
> MailScanner <http://www.mailscanner.info/> , and is believed to be clean.
>
>
> ==========
> Email Forum -
> List">http://www.matronics.com/Navigator?Yak-List
> ==========
> p; - MATRONICS WEB FORUMS -
> ums.matronics.com
> ==========
> p; - List Contribution Web Site -
> p; -Matt Dralle, List Admin.
> http://www.matronics.com/contribution
> ==========
>
>
> http://www.matronics.com/contribution
==========
Email Forum -
List">http://www.matronics.com/Navigator?Yak-List
==========
p; - MATRONICS WEB FORUMS -
ums.matronics.com
==========
p; - List Contribution Web Site -
p; -Matt Dralle, List Admin.
http://www.matronics.com/contribution
==========
Message 18
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|
| Subject: | M14P mag coils (YAk52) |
OK thanks Dennis. But this morning when I had to transit it back to the mtce airfield
(10minute flight), all was ok with both mags.
Seems to be a temperature related issue....
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email: nigel@yakdisplay.com
mobile: (+44) 7809 116676
web:http://yakdisplay.com
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: 27 July 2015 17:48
Subject: Re: Yak-List: M14P mag coils (YAk52)
--> <dsavarese0812@bellsouth.net>
I'm not saying that what I'm about to say defines the problem. But when a coil
is replaced, thetop contact in the coil touches the high voltage stick. Plus
the wire from the coil is passed up through a hole and affixed to the block right
next to the stick. It is possible the stick moved ever so slightly and is
now arcing to ground.
Also, it could be the foot on the points has finally worn down to where the foot
no longer rubs on the cam. As previously stated, if the points don't open,
coil not work-ee. :-)
Why not just replace the high voltage stick just for grins and see what happens?
BTW, don'tput your finger on it to test it while someone rotates the prop.
You might earn a Darwin award if you did.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 11:06 AM, Nigel Willson wrote:
> Thanks Dennis. Will pass it on to the maintenance guys. I suspect they
> have checked these things already though. They have been looking after
> yams for years. The problem has been intermittent so far, except for
> the last flight. Strangely after a coil change...
>
> Regards,
>
> Nigel Willson
> Flying Instructor / Examiner
> Display Pilot
>
> Tel. 07809 116676
> Web. yakdisplay.com
>
> Sent from my HTC One mini 2
>
> ----- Reply message -----
> From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Yak-List: M14P mag coils (YAk52)
> Date: Mon, Jul 27, 2015 17:03
>
> <dsavarese0812@bellsouth.net>
>
> Nigel,
> Did you verify the points are opening and closing properly and set to
> .25-.35mm? See if the foot of the points is still there and not worn
> down to where it does not contact the point cam. Poor lubrication of
> the cam causes the foot to wear significantly. If the points are not
> opening, the mag will not fire.
>
> Did you check the high voltage stick to make sure it was not arcing to
> ground on the side of it? Sometimes the high voltage stick is cracked.
> Especially right around the part of the stick that is protruding just
> above the hole in fits into. If it cracks, the voltage from the coil
> will never make it to the cap because it is arcing to ground.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 (mobile)
> www.yak-52.com <http://www.yak-52.com> Skype - Yakguy1
>
> On 7/27/2015 10:31 AM, Nigel Willson wrote:
> > Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
> > looked at. And when I say total cut, I had a rough engine, and
> > selected mags individually in flight to see which was causing the
> > problem. On mag2, got a total cut. Mag1 ran fine.
> >
> > Regards,
> >
> > Nigel Willson
> > Flying Instructor / Examiner
> > Display Pilot
> >
> > Tel. 07809 116676
> > Web. yakdisplay.com
> >
> > Sent from my HTC One mini 2
> >
> > ----- Reply message -----
> > From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
> > To: "yak-list@matronics.com" <yak-list@matronics.com>
> > Subject: Yak-List: M14P mag coils (YAk52)
> > Date: Mon, Jul 27, 2015 16:20
> >
> > <mark.bitterlich@navy.mil>
> >
> > None of my business Nigel, but if you don't mind I'd like to ask a
> > question.
> >
> > Assuming your engine is having "total cuts in flight", and you know
> > which mag you think is causing the problem, have you ever turned
> > that mag completely OFF with the mag switch and tested to see if the
> > condition continues?
> >
> > And another suggestion that may sound rather dumb, but ...... .
> >
> > I have seen the wiring to the mag switch reversed on more than one
> > occasion. This obviously can lead the owner to think the wrong mag is
> > bad. Simply put an ohm-meter on the P lead and check to see which
> > switch position grounds it JUST TO BE SURE.
> >
> > My 2 cents only.
> >
> > Mark
> >
> >
> > -----Original Message-----
> > From: owner-yak-list-server@matronics.com
> > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard
> > Goode
> > Sent: Monday, July 27, 2015 9:11 AM
> > To: yak-list@matronics.com
> > Subject: RE: Yak-List: M14P mag coils (YAk52)
> >
> > You say that the problem continued with a "new" coil - I suspect you
> > have anticipated the problem yourself in that I suspect the
> > replacement coil was also not working well.
> >
> >
> >
> > After almost 30 years with these engines, I can say that almost any
> > high-tension ignition problem does come down to magneto coils or, on
> > occasions, the high-tension wiring.
> >
> >
> >
> > Coils are a significant problem. M 14 P Inc are making new ones, as
> > we in Hungary. We know that ours are perfect, but our level of
> > production is such that we need to reserve most of them for our
> > engine overhaul customers, but can supply some to others if they want.
> >
> >
> >
> > If anyone is interested, please come back to me off list.
> >
> >
> >
> > Richard Goode
> >
> >
> >
> > Rhodds Farm
> >
> > Lyonshall
> >
> > Hereford
> >
> > HR5 3LW
> >
> > United Kingdom
> >
> > Tel: +94 (0) 81 241 5137 (Sri Lanka)
> >
> > Tel: +44 (0) 1544 340120
> >
> > Fax: +44 (0) 1544 340129
> >
> > www.russianaeros.com <http://www.russianaeros.com>
> <http://www.russianaeros.com>
> > <http://www.russianaeros.com>
> >
> > I'm currently in Sri Lanka but this Mail is working,and my local
> > phone is +94 779 132 160.
> >
> >
> >
> > From: owner-yak-list-server@matronics.com
> > [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel
> > Willson
> > Sent: Monday, July 27, 2015 4:52 PM
> > To: info@m-14p.com; yak-list@matronics.com
> > Subject: Yak-List: M14P mag coils (YAk52)
> >
> >
> >
> > Jill/All,
> >
> >
> >
> > Recent threads on the subject of mag problems and total cuts in
> > flights etc. suggest changing the mag coil cures the problem.
> >
> >
> >
> > I've recently changed one on my M14P Yak52, only to be presented
> > with the same problem again on the replaced coil. (Everything else
> > has been checked out).
> >
> >
> >
> > Discussions with various people seem to point to it being an "age"
> > breakdown problem with the coils rather than a "amount of use" problem.
> >
> >
> >
> > So, the question is, does anyone have a supply of KNOWN GOOD coils
> > that can be used as a replacement?
> >
> >
> >
> > If anyone DOES, can they let me know price including shipping to the
> > UK? Or, and alternative source of supply (Termikas tell me "not
> > available" and "unable to overhaul").
> >
> >
> >
> > Thanks in advance everyone...
> >
> >
> >
> > Regards,
> >
> > Nigel Willson
> >
> > Flying Instructor/Examiner and Display Pilot
> >
> > _________________________________________________
> > email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
> > mobile: (+44) 7809 116676
> > web: http://yakdisplay.com <http://yakdisplay.com/>
> > Description: cid:image001.png@01C8A476.2E19D440
> >
> >
> >
> >
> > --
> > This message has been scanned for viruses and dangerous content by
> > MailScanner <http://www.mailscanner.info/> , and is believed to be
> clean.
> >
> >
> >
> > ==========
> > Email Forum -
> > List">http://www.matronics.com/Navigator?Yak-List
> > ==========
> > p; - MATRONICS WEB FORUMS -
> > ums.matronics.com
> > ==========
> > p; - List Contribution Web Site -
> > p; -Matt Dralle, List Admin.
> > http://www.matronics.com/contribution
> > ==========
> >
> >
> >
> > http://www.matronics.com/contribution
>
>
> ==========
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> ==========
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> ums.matronics.com
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Message 19
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| Subject: | Re: M14P mag coils (YAk52) |
That's good to know Nigel.
That tell me the points are working.
Since some of the high voltage sticks arecoated with wax; the hotter the
mag gets, the softer the wax gets. If there is even the smallest crack
in the wrapping around the stick which is covered by the wax, when the
wax gets soft, it may be allowing the stick to arc to ground.
I'd still replace the high voltage stick. They are inexpensive.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/27/2015 12:21 PM, Nigel Willson wrote:
>
> OK thanks Dennis. But this morning when I had to transit it back to the mtce
airfield (10minute flight), all was ok with both mags.
> Seems to be a temperature related issue....
>
> Regards,
> Nigel Willson
> Flying Instructor/Examiner and Display Pilot
> _________________________________________________
> email: nigel@yakdisplay.com
> mobile: (+44) 7809 116676
> web: http://yakdisplay.com
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
> Sent: 27 July 2015 17:48
> To: yak-list@matronics.com
> Subject: Re: Yak-List: M14P mag coils (YAk52)
>
> --> <dsavarese0812@bellsouth.net>
>
> I'm not saying that what I'm about to say defines the problem. But when a coil
is replaced, thetop contact in the coil touches the high voltage stick. Plus
the wire from the coil is passed up through a hole and affixed to the block
right next to the stick. It is possible the stick moved ever so slightly and
is now arcing to ground.
>
> Also, it could be the foot on the points has finally worn down to where the foot
no longer rubs on the cam. As previously stated, if the points don't open,
coil not work-ee. :-)
>
> Why not just replace the high voltage stick just for grins and see what happens?
BTW, don'tput your finger on it to test it while someone rotates the prop.
You might earn a Darwin award if you did.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
> On 7/27/2015 11:06 AM, Nigel Willson wrote:
>> Thanks Dennis. Will pass it on to the maintenance guys. I suspect they
>> have checked these things already though. They have been looking after
>> yams for years. The problem has been intermittent so far, except for
>> the last flight. Strangely after a coil change...
>>
>> Regards,
>>
>> Nigel Willson
>> Flying Instructor / Examiner
>> Display Pilot
>>
>> Tel. 07809 116676
>> Web. yakdisplay.com
>>
>> Sent from my HTC One mini 2
>>
>> ----- Reply message -----
>> From: "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
>> To: "yak-list@matronics.com" <yak-list@matronics.com>
>> Subject: Yak-List: M14P mag coils (YAk52)
>> Date: Mon, Jul 27, 2015 17:03
>>
>> <dsavarese0812@bellsouth.net>
>>
>> Nigel,
>> Did you verify the points are opening and closing properly and set to
>> .25-.35mm? See if the foot of the points is still there and not worn
>> down to where it does not contact the point cam. Poor lubrication of
>> the cam causes the foot to wear significantly. If the points are not
>> opening, the mag will not fire.
>>
>> Did you check the high voltage stick to make sure it was not arcing to
>> ground on the side of it? Sometimes the high voltage stick is cracked.
>> Especially right around the part of the stick that is protruding just
>> above the hole in fits into. If it cracks, the voltage from the coil
>> will never make it to the cap because it is arcing to ground.
>> Dennis
>>
>> A. Dennis Savarese
>> 334-546-8182 (mobile)
>> www.yak-52.com <http://www.yak-52.com> Skype - Yakguy1
>>
>> On 7/27/2015 10:31 AM, Nigel Willson wrote:
>>> Thanks Mark. Yes, p-leads have been traced to ensure correct mag was
>>> looked at. And when I say total cut, I had a rough engine, and
>>> selected mags individually in flight to see which was causing the
>>> problem. On mag2, got a total cut. Mag1 ran fine.
>>>
>>> Regards,
>>>
>>> Nigel Willson
>>> Flying Instructor / Examiner
>>> Display Pilot
>>>
>>> Tel. 07809 116676
>>> Web. yakdisplay.com
>>>
>>> Sent from my HTC One mini 2
>>>
>>> ----- Reply message -----
>>> From: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich@navy.mil>
>>> To: "yak-list@matronics.com" <yak-list@matronics.com>
>>> Subject: Yak-List: M14P mag coils (YAk52)
>>> Date: Mon, Jul 27, 2015 16:20
>>>
>>> <mark.bitterlich@navy.mil>
>>>
>>> None of my business Nigel, but if you don't mind I'd like to ask a
>>> question.
>>>
>>> Assuming your engine is having "total cuts in flight", and you know
>>> which mag you think is causing the problem, have you ever turned
>>> that mag completely OFF with the mag switch and tested to see if the
>>> condition continues?
>>>
>>> And another suggestion that may sound rather dumb, but ...... .
>>>
>>> I have seen the wiring to the mag switch reversed on more than one
>>> occasion. This obviously can lead the owner to think the wrong mag is
>>> bad. Simply put an ohm-meter on the P lead and check to see which
>>> switch position grounds it JUST TO BE SURE.
>>>
>>> My 2 cents only.
>>>
>>> Mark
>>>
>>>
>>> -----Original Message-----
>>> From: owner-yak-list-server@matronics.com
>>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Richard
>>> Goode
>>> Sent: Monday, July 27, 2015 9:11 AM
>>> To: yak-list@matronics.com
>>> Subject: RE: Yak-List: M14P mag coils (YAk52)
>>>
>>> You say that the problem continued with a "new" coil - I suspect you
>>> have anticipated the problem yourself in that I suspect the
>>> replacement coil was also not working well.
>>>
>>>
>>>
>>> After almost 30 years with these engines, I can say that almost any
>>> high-tension ignition problem does come down to magneto coils or, on
>>> occasions, the high-tension wiring.
>>>
>>>
>>>
>>> Coils are a significant problem. M 14 P Inc are making new ones, as
>>> we in Hungary. We know that ours are perfect, but our level of
>>> production is such that we need to reserve most of them for our
>>> engine overhaul customers, but can supply some to others if they want.
>>>
>>>
>>>
>>> If anyone is interested, please come back to me off list.
>>>
>>>
>>>
>>> Richard Goode
>>>
>>>
>>>
>>> Rhodds Farm
>>>
>>> Lyonshall
>>>
>>> Hereford
>>>
>>> HR5 3LW
>>>
>>> United Kingdom
>>>
>>> Tel: +94 (0) 81 241 5137 (Sri Lanka)
>>>
>>> Tel: +44 (0) 1544 340120
>>>
>>> Fax: +44 (0) 1544 340129
>>>
>>> www.russianaeros.com <http://www.russianaeros.com>
>> <http://www.russianaeros.com>
>>> <http://www.russianaeros.com>
>>>
>>> I'm currently in Sri Lanka but this Mail is working,and my local
>>> phone is +94 779 132 160.
>>>
>>>
>>>
>>> From: owner-yak-list-server@matronics.com
>>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Nigel
>>> Willson
>>> Sent: Monday, July 27, 2015 4:52 PM
>>> To: info@m-14p.com; yak-list@matronics.com
>>> Subject: Yak-List: M14P mag coils (YAk52)
>>>
>>>
>>>
>>> Jill/All,
>>>
>>>
>>>
>>> Recent threads on the subject of mag problems and total cuts in
>>> flights etc. suggest changing the mag coil cures the problem.
>>>
>>>
>>>
>>> I've recently changed one on my M14P Yak52, only to be presented
>>> with the same problem again on the replaced coil. (Everything else
>>> has been checked out).
>>>
>>>
>>>
>>> Discussions with various people seem to point to it being an "age"
>>> breakdown problem with the coils rather than a "amount of use" problem.
>>>
>>>
>>>
>>> So, the question is, does anyone have a supply of KNOWN GOOD coils
>>> that can be used as a replacement?
>>>
>>>
>>>
>>> If anyone DOES, can they let me know price including shipping to the
>>> UK? Or, and alternative source of supply (Termikas tell me "not
>>> available" and "unable to overhaul").
>>>
>>>
>>>
>>> Thanks in advance everyone...
>>>
>>>
>>>
>>> Regards,
>>>
>>> Nigel Willson
>>>
>>> Flying Instructor/Examiner and Display Pilot
>>>
>>> _________________________________________________
>>> email: nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
>>> mobile: (+44) 7809 116676
>>> web: http://yakdisplay.com <http://yakdisplay.com/>
>>> Description: cid:image001.png@01C8A476.2E19D440
>>>
>>>
>>>
>>>
>>> --
>>> This message has been scanned for viruses and dangerous content by
>>> MailScanner <http://www.mailscanner.info/> , and is believed to be
>> clean.
>>>
>>>
>>> ==========
>>> Email Forum -
>>> List">http://www.matronics.com/Navigator?Yak-List
>>> ==========
>>> p; - MATRONICS WEB FORUMS -
>>> ums.matronics.com
>>> ==========
>>> p; - List Contribution Web Site -
>>> p; -Matt Dralle, List Admin.
>>> http://www.matronics.com/contribution
>>> ==========
>>>
>>>
>>>
>>> http://www.matronics.com/contribution
>>
>> ==========
>> Email Forum -
>> List">http://www.matronics.com/Navigator?Yak-List
>> ==========
>> p; - MATRONICS WEB FORUMS -
>> ums.matronics.com
>> ==========
>> p; - List Contribution Web Site -
>> p; -Matt Dralle, List Admin.
>> http://www.matronics.com/contribution
>> ==========
>>
>>
>>
>> http://www.matronics.com/contribution
>
>
Message 20
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| Subject: | Re: M14P mag coils (YAk52) |
Hi all,
I had some inflight "entertainment" with these coils in past two years as well.
Seems that is age-related plus heat sensitive. Recently I had put two "good"
coils on the Yak but the flight test produced great cut-outs once again after
minimum half an hour in the air. So I put them in the oven at 75 degrees Celsius
for 3 hours and yes, as expected, spark length reduced from half an inch cold
to around 4mm to max 7mm hot, so not acceptable !
I had rewinds last year with no heat variation on spark length, be it cold or
hot, capacitor external, car type. But I did not like the thin spark after the
rewind, around half an inch length was OK though. So just now there are two fresh
poor coils for rewind, will tell results then.
So in the present case Id suggest putting the mags in the oven and see after
3 hours what they do. I guess you will find unacceptable sparks for operation.
As I see it, the Russian coils with their coating on the windings and the internal
capacitor may age so I will not fit any coil again as long as I do not
know when it was produced. Besides, helicopter engines with M 14 radials had extra
cooling ducts for both mags !!
So no need for a lot of head scratching about other spark shorting out anywhere
in the mag: Try another coil in your mag in both conditions, cold and hot
and see yourself: A good/modern coil will get you a long fat spark in warm mode
whereas a bad coil will fail this test with all the rest of the mag being the
same components.
Good luck with that one
Cheers
Vic
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=445277#445277
Attachments:
http://forums.matronics.com//files/p1030694__kopie_165.jpg
Message 21
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| Subject: | Re: M14P mag coils (YAk52) |
Nigel,
I am just parachuting into this discussion, so I may not be clear as to you
r
challenge, I had intermittent running problems years ago. I really
struggled with it. I came to dislike the aircraft for a while as it the
engine would gallup and chuff and shake the cowl. In flight..
iIntermittently. Sometimes occasionally, sometimes periodically. I tried
a
bunch of things but what did the trick was to discard the Russian ignition
wire ring and replace it with freestanding wires. It seems that there wer
e
short in the insulated shielded wires in the ring and the real tell was whe
n
I figured out that the problem was happening at altitudes of 5-7k and above
(approximately) shorting became more prevalent as the shielding and
conductivity changes with altitude.
If you=B9ve already done that =8Athen never mind! ;-)
My $.02 Cheers!
From: <owner-yak-list-server@matronics.com> on behalf of Nigel Willson
<nigel@yakdisplay.com>
<yak-list@matronics.com>
Subject: Yak-List: M14P mag coils (YAk52)
Jill/All,
Recent threads on the subject of mag problems and total cuts in flights etc
.
suggest changing the mag coil cures the problem.
I=B9ve recently changed one on my M14P Yak52, only to be presented with the
same problem again on the replaced coil. (Everything else has been checked
out).
Discussions with various people seem to point to it being an =B2age=B2 breakdow
n
problem with the coils rather than a =B3amount of use=B2 problem.
So, the question is, does anyone have a supply of KNOWN GOOD coils that can
be used as a replacement?
If anyone DOES, can they let me know price including shipping to the UK? Or
,
and alternative source of supply (Termikas tell me =B3not available=B2 and
=B3unable to overhaul=B2).
Thanks in advance everyone=8A
Regards,
Nigel Willson
Flying Instructor/Examiner and Display Pilot
_________________________________________________
email:nigel@yakdisplay.com <mailto:nigel@yakdisplay.com>
mobile: (+44) 7809 116676
web: http://yakdisplay.com <http://yakdisplay.com/>
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