Today's Message Index:
----------------------
1. 12:35 AM - Re: Pressure Problem (PaulW)
2. 03:13 AM - Re: harmonic vibration new prop Yak 55m (Steve Geard)
3. 03:31 AM - Re: harmonic vibration new prop Yak 55m (Steve Geard)
4. 03:44 AM - Re: oil levels (Steve Geard)
5. 04:38 AM - Re: Re: Pressure Problem (A. Dennis Savarese)
6. 08:10 AM - Re: CJ-6 Generator Query (Bitterlich, Mark G CIV NAVAIR, WD)
7. 08:52 AM - Re: CJ-6 Generator Query (Bitterlich, Mark G CIV NAVAIR, WD)
8. 09:07 AM - Re: Re: harmonic vibration new prop Yak 55m (Walter Lannon)
9. 01:07 PM - Re: UK CJ6 mods' (jay-dub)
10. 02:26 PM - Re: Re: UK CJ6 mods' (jblake207@comcast.net)
11. 02:43 PM - CJ6A and M14 engine (airmanv2)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pressure Problem |
Thanks Rob! Will investigate coming weekend.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426275#426275
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: harmonic vibration new prop Yak 55m |
Thanks guys, all good info.
Walt I better add a bit of detail.
My engineer removed the original V530 wooden blades and all the weights on the
hub that were used in the dynamic balance on the 55. At that stage there was no
spinner or back plate.
These blades were then fitted to a Yak52 and the weights used to dynamic balance
the Yak 52.
The blades from Whirlwind that we fitted to the 55 are brand new carbon composite
supplied as a matching pair. The agent told me they "should be" with in 2 grams
of each other. My engineer didn't weigh them :-/
The 1mm was the difference from center of hub to rear tip of each blade. We are
also fitting a matching whirlwind backplate and spinner. They weigh next to nothing
are extremely light.
I was told by someone who had also fitted some carbon composite blades to a Yak55
that they were very smooth without a dynamic balance.
I'm thinking we should check the angles, check the clamps and do a dynamic balance
without the spinner. See how it goes. Are we on the right track? Cheers Steve
:-)
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426278#426278
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: harmonic vibration new prop Yak 55m |
Just reread your post Walt.
Are you saying the weights attached to the hub (the flat plates shaped to fit round
the hub) are part of the hub static balance, and not used to dynamically
balance the blades? That wouldn't be so good, since they're now on another plane
LOL.
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426279#426279
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Thats interesting. I've been wasting all that oil and having to clean my plane
all this time.... Kinda thought having 10/11 in the tank was being safe!
I've never really taken too much notice. But isn't the scale on the dipstick linear
?
In a round tank?
Steve Yak55m
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426280#426280
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pressure Problem |
Most folks either never or very rarely remove the output check valve on the
compressor to disassemble and clean it.- The little "piston" gets so car
boned up that it is stuck closed.- It is suppose to open and close with e
ach output stroke of the compressor.=0A=0AIt might be a good idea to remove
it, disassemble it, clean it and reinstall with new crush washers.- The
attached photo is not the best.- But it does show the compressor output c
heck valve disassembled.-- The "piston" is next to the little spring on
the left.- The spring fits inside the piston and the piston inside the a
ssembly just to the left of it.- The end of the unit (left side) fits ins
ide the compressor.- The end of the little "piston" is about the size of
a pencil eraser.=0A=0ADennis=0A=0A=0A=0A________________________________=0A
From: Rob Rowe <yak-list@robrowe.plus.com>=0ATo: yak-list@matronics.com
=0ASent: Monday, July 7, 2014 11:00 PM=0ASubject: Yak-List: Re: Pressure Pr
.plus.com>=0A=0APaul,=0A=0AThe attached graph image is from the AK50 schema
tic poster that may be of some help to you.=0A=0ANote :=0A- the graph is to
fill an 8 litre bottle, on a YAK-52 the main bottle is 11 litres=0A- the R
PM quoted "may" be related to the compressor speed, which is 0.9 engine spe
ed (I think)=0A=0AIf you've no obvious leak then it's worth a quick check o
f the compressor outlet non-return valve. If this is leaking then the charg
e performance gets reduced and as the compressor cools post shutdown air tr
apped in the pipes & "snot pot" downstream of the pressure regulator valve
gets bled back into the engine crank case and out the breather vent. =0A=0A
Easy way to find out is to check whether the "snot" valve loses back pressu
re soon after shutting down. Also try putting a rubber glove over the breat
her vent just after shutdown, if it starts to inflate then that's where you
r air has gone!=0A=0ANow this may not be your problem, but at least it's an
easy way to eliminate one candidate.=0A=0AHope this helps.=0A=0ABrgds, Rob
R=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.
com/viewtopic.php?p=426270#426270=0A=0A=0A=0A=0AAttachments: =0A=0Ahttp:/
/forums.matronics.com//files/ak50_compressor_performance_139.jpg=0A=0A=0A
==============
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | CJ-6 Generator Query |
Does the CJ6A use the same type of reverse current relay as the Yak's and Sukhoi's?
I am not sure.
However, it has a generator, so there should be some kind of reverse current relay
in there. How the light is activated by this relay I am not sure. I know
the Yak electrical system VERY well, but not the CJ6A.
Who is the electrical guru on the CJ anyway?
Sorry I cannot agree with Dave about filing relay contacts. Yes, it was done a
lot on old cars. This was at best a temporary fix. As regards relay points,
"back in the day" you could purchase a relay contact burnishing tool kit, which
had very precise cut jewelers files, followed by a strip of metal that was
used to try and restore the contact points (as Dave was talking about). This
method was given up a LONG time ago what with some of the special alloys used
on contact points. Typically back in the day, these points "stuck" because they
arced enough to actually weld the contacts together. The filing "fix" was
done in order to eliminate all the contact burning and arcing which would stop
the "welding" for a certain time period, but it would always happen again, because
the filing was never even close to "perfect".
Given that this is an airplane and not a car, filing relay points would not be
on my list of things to do, other than maybe to get me home to where I could
immediately replace it.
This does not help with the original question though, as to why the light is not
going on at low RPM. This bothers me quite a bit because there are two possible
causes:
1. The light is simply not working right, and no big concern is necessary.
2. The reverse current relay is not working right, in which case there is a serious
cause for concern. Once the generator slows down to where it puts out
less voltage than the battery, current then flows BACKWARDS from the battery
into the generator. In truth the generator is now acting like a motor. The amount
of current flow is limited only by the difference in voltage between the
slow turning generator and the battery, and lastly THE SIZE OF THE WIRE, which
will heat up and eventually burn, unless a fuse blows first.
The "Reverse Current Relay" does exactly what its name implies. If current is
flowing in reverse, from the battery to the generator, it OPENS thus breaking
the circuit between the battery and the generator, thus stopping really BAD things
from happening. In the Yak, this reverse current relay is located in the
DMR-200 "Combined Device" located in the main electrical compartment. How it
works in the CJ is again outside my field of expertise.
However, when you find it, replace it... if in fact that is what is bad.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of KingCJ6@aol.com
Sent: Monday, July 07, 2014 11:23 PM
Subject: Re: Yak-List: CJ-6 Generator Query
Not sure if it's applicable to CJs, but in older cars with voltage regulators,
lightly filing the contact points would stop the sticking.
Dave
In a message dated 7/7/2014 6:35:28 P.M. Pacific Daylight Time, cjaviator@gmail.com
writes:
Hi all.
I have a CJ here that when running the generator warning light will not
come on when the RPM is reduced. Normally comes on at @ 1000 RPM.
Occasionally cycling it will get it operating normally but more often than
not it will not go off line.
Light comes on when engine is shut down.
Any tips or advice here? Is it a matter of giving the regulator a birthday
or similar?
Regards, Jay
New Zealand
="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
s.matronics.com/">http://forums.matronics.com
p://www.matronics.com/contribution">http://www.matronics.com/contribution
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | CJ-6 Generator Query |
It just dawned on me what this problem could easily be.
You might have extremely weak batteries in your aircraft. Put a digital meter
directly on your battery terminals. Read the voltage and then turn on something
that draws some current. A landing light would be nice, but failing that
Pitot Heat would be OK, but not for very long!
Check and see that your battery voltage does not drop below 22 volts or so. If
it goes down to in the "teen" range, like 19 or below... replace the batteries
and it will fix your issue.
The reverse current relay in your aircraft (where-ever it is, solid state or otherwise)
works by allowing a certain amount of reverse current. If not enough
reverse current flows, the relay will never open, until the engine is totally
shut off. This can easily happen if your batteries are just worn slam out.
And that happens ALL the time with these aircraft, as they are not used for
starting, and folks do not realize how important it is to check them properly,
and as such they slowly degrade to where something like this happens.
There is a pretty high possibility this is your problem. I hope so anyway, as
it is an easy fix.
Mark
-----Original Message-----
From: Bitterlich, Mark G CIV NAVAIR, WD
Sent: Tuesday, July 08, 2014 11:09 AM
Subject: RE: Yak-List: CJ-6 Generator Query
Does the CJ6A use the same type of reverse current relay as the Yak's and Sukhoi's?
I am not sure.
However, it has a generator, so there should be some kind of reverse current relay
in there. How the light is activated by this relay I am not sure. I know
the Yak electrical system VERY well, but not the CJ6A.
Who is the electrical guru on the CJ anyway?
Sorry I cannot agree with Dave about filing relay contacts. Yes, it was done a
lot on old cars. This was at best a temporary fix. As regards relay points,
"back in the day" you could purchase a relay contact burnishing tool kit, which
had very precise cut jewelers files, followed by a strip of metal that was
used to try and restore the contact points (as Dave was talking about). This
method was given up a LONG time ago what with some of the special alloys used
on contact points. Typically back in the day, these points "stuck" because they
arced enough to actually weld the contacts together. The filing "fix" was
done in order to eliminate all the contact burning and arcing which would stop
the "welding" for a certain time period, but it would always happen again, because
the filing was never even close to "perfect".
Given that this is an airplane and not a car, filing relay points would not be
on my list of things to do, other than maybe to get me home to where I could
immediately replace it.
This does not help with the original question though, as to why the light is not
going on at low RPM. This bothers me quite a bit because there are two possible
causes:
1. The light is simply not working right, and no big concern is necessary.
2. The reverse current relay is not working right, in which case there is a serious
cause for concern. Once the generator slows down to where it puts out
less voltage than the battery, current then flows BACKWARDS from the battery
into the generator. In truth the generator is now acting like a motor. The amount
of current flow is limited only by the difference in voltage between the
slow turning generator and the battery, and lastly THE SIZE OF THE WIRE, which
will heat up and eventually burn, unless a fuse blows first.
The "Reverse Current Relay" does exactly what its name implies. If current is
flowing in reverse, from the battery to the generator, it OPENS thus breaking
the circuit between the battery and the generator, thus stopping really BAD things
from happening. In the Yak, this reverse current relay is located in the
DMR-200 "Combined Device" located in the main electrical compartment. How it
works in the CJ is again outside my field of expertise.
However, when you find it, replace it... if in fact that is what is bad.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of KingCJ6@aol.com
Sent: Monday, July 07, 2014 11:23 PM
Subject: Re: Yak-List: CJ-6 Generator Query
Not sure if it's applicable to CJs, but in older cars with voltage regulators,
lightly filing the contact points would stop the sticking.
Dave
In a message dated 7/7/2014 6:35:28 P.M. Pacific Daylight Time, cjaviator@gmail.com
writes:
Hi all.
I have a CJ here that when running the generator warning light will not
come on when the RPM is reduced. Normally comes on at @ 1000 RPM.
Occasionally cycling it will get it operating normally but more often than
not it will not go off line.
Light comes on when engine is shut down.
Any tips or advice here? Is it a matter of giving the regulator a birthday
or similar?
Regards, Jay
New Zealand
="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
s.matronics.com/">http://forums.matronics.com
p://www.matronics.com/contribution">http://www.matronics.com/contribution
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: harmonic vibration new prop Yak 55m |
Hi Steve;
Yes. But not just the hub, that is the static balance correction for the
propellor.
Horizontal static balance is corrected first and weight attached. Then with
the prop vertical on the balance ways vertical imbalance is corrected by
moving that weight circumferentially on the hub.
On a rare occasion you may find one of these props with corrective balance
weights on both sides of the hub. In that case the vertical unbalance
correction exceeded the horizontal and additional weight was added to both
sides in the correct location to maintain the horizontal correction and
correct the vertical.
Unless there is a spinner on the propellor dynamic balance may or may not be
of any value. Since this is intended to correct mass imbalance of the
power plant assembly corrective weight may be required in any position from
0 to 360 degs.
Without a spinner backplate or at least three blades that is a crap shoot.
Walt
-----Original Message-----
From: Steve Geard
Sent: Tuesday, July 08, 2014 3:30 AM
Subject: Yak-List: Re: harmonic vibration new prop Yak 55m
Just reread your post Walt.
Are you saying the weights attached to the hub (the flat plates shaped to
fit round the hub) are part of the hub static balance, and not used to
dynamically balance the blades? That wouldn't be so good, since they're now
on another plane LOL.
--------
SteveO
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426279#426279
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: UK CJ6 mods' |
I reckon you have two hopes of getting the M14P approved for the CJ-6 in the UK.
No hope and Bob Hope .... and Bob's dead.
--------
CJ and Yak-52 owner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426320#426320
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: UK CJ6 mods' |
Now that's funny!=C2- JB
----- Original Message -----
From: "jay-dub" <flyjnw@gmail.com>
Sent: Tuesday, July 8, 2014 3:05:38 PM
Subject: Yak-List: Re: UK CJ6 mods'
I reckon you have two hopes of getting the M14P approved for the CJ-6 in th
e UK. No hope and Bob Hope .... and Bob's dead.
--------
CJ and Yak-52 owner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426320#426320
===========
===========
MS -
===========
e -
=C2- =C2- =C2- =C2- =C2--Matt Dralle, List Admin.
===========
Message 11
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | CJ6A and M14 engine |
Hello guys,
I request help about all the CJ6a owner Worldwide community to make a list of airworthy
CJ6A, M14 equipped , with: registration, serial number, location.
In fact, it is to try to get the UK-CAA to well considerate that the M14 engine
is a perfect alternative to the huosai Engine when this one is out of order
or overhaul is impossible. A numerous list showing that there are a lot of flying
CJ6 with M14 around the world could help a lot.
I can't imagine that the plane could be grounded in Europe just for a non administrative
agreement to change the engine by a quite similar type.
Thank you in advance for your help
Bruno
--------
Fly safe
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=426326#426326
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|