Today's Message Index:
----------------------
1. 09:58 AM - Re: Yak 55M Voltage regulator Overvoltage? (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
2. 10:03 AM - Re: Re: Yak 55M Voltage regulator Overvoltage? (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
3. 10:38 AM - Re: Yak 55M Voltage regulator Overvoltage? (William Halverson)
4. 11:05 AM - Re: Yak 55M Voltage regulator Overvoltage? (Gill Gutierrez)
5. 11:06 AM - Re: Yak 55M Voltage regulator Overvoltage? (George Coy)
6. 11:06 AM - Re: Re: Yak 55M Voltage regulator Overvoltage? (Brian Lloyd)
7. 11:06 AM - Re: Yak 55M Voltage regulator Overvoltage? (Brian Lloyd)
8. 11:06 AM - Re: Yak 55M Voltage regulator Overvoltage? (Javier Carrasco)
9. 11:12 AM - Re: Yak 55M Voltage regulator Overvoltage? (A. Dennis Savarese)
10. 01:13 PM - Re: Yak 55M Voltage regulator Overvoltage? (William Halverson)
11. 01:22 PM - Re: Yak 55M Voltage regulator Overvoltage? (William Halverson)
12. 07:03 PM - Accessory case more pix (Roger Kemp M.D.)
13. 07:03 PM - Generator splined gear drive (Roger Kemp M.D.)
14. 07:03 PM - More accessory case (Roger Kemp M.D.)
15. 07:04 PM - Accessory drive (Roger Kemp M.D.)
16. 08:05 PM - Re: Yak 55M Voltage regulator Overvoltage? (Rob Rowe)
Message 1
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| Subject: | Yak 55M Voltage regulator Overvoltage? |
You betcha!
I am very impressed with the B&C SK35 with the LS1A regulator. I have
installed that model in a few aircraft, the latest being a Sukhoi 26.
If anyone needs help doing that, email me. Oh, yes B&C also makes a
higher current alternator if you want that. I believe it is the SK50.
Cost is about $1000 plus or minus.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
Sent: Monday, June 04, 2012 2:03 PM
Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
Mark,
As an alternative, it is possible to replace the generator on the M-14P
with a lightweight 35 amp or 50 amp alternator.
http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
The companion solid sate voltage regulator weighs only 9 ozs.
http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
These were designed for the M-14P and are what I am using. This doesn't
fix your immediate problem, but is another approach using current
technology.
Warren Hill
N464TW
On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
Gentlemen,
I have read in past posts about the over voltage
scenario and feel I am dealing with the same problem.
I have two Yak 55's one with the original system and one
with a B &C. I'm having problems with the original system and
generator.
Problem: 30v at flight RPM. Trips off (AKKyM) circuit
breaker removing all power from the system as designed.
Batteries show good on load test
Voltage when (AKKyM) is out, still registers 30v at
flight RPM and decreases to 15V at idle verifying batteries are off
line.
Question: How to adjust voltage regulator on original
style Yak 55M if this is the likely problem?
Sincerely,
Mark Sorenson
678-463-5944
www.tigerairshows.com <http://www.tigerairshows.com/>
3D=======================
3D====================
href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">ht
tp://www.matronics.com/Navigator?Yak-List
3D=======================
3D====================
href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.matr
onics.com
3D=======================
3D====================
href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http://w
ww.matronics.com/contribution
3D=======================
3D====================
Message 2
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
Rob, I think his voltage measurements were at the generator and not the
main bus. Don't know that for sure, but I think so.
This would make 15 volts at idle pretty normal. (The DMR-200 would open
and you would be reading straight generator voltage)
If the main contactor was indeed fused closed, when the engine stopped,
it should blow the main battery fuse, because at that point the "motor"
would not be spinning and would represent a dead short to ground, or
darn close to it.
Agreed?
Mark
p.s. No I do not have 55 schematics, just a few pictures. However, all
of these are usually identical... mostly. Well 95% anyway. :-)
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Rob Rowe
Sent: Monday, June 04, 2012 1:31 PM
Subject: Yak-List: Re: Yak 55M Voltage regulator Overvoltage?
Hi Mark,
Don't have -55M electrical schematics (if you do then please post) but
Russian -55M pilot's manual references same components as those found in
other Yaks ... so will ASSUME we're dealing with essentially the same
beast here.
On that basis ... the AKKyM is likely to be a switch (up battery, middle
off, down ext power?) not a breaker. Please confirm, if not then post an
image of your panel showing its location. Or are you referring to the OV
protection box "A3N-A2" reset button?
The problem you're describing could be explained by the Contactor having
failed with its contacts welded together, so although various safety
devices may be kicking in the battery & generator remain connected
regardless.
This may explain why, with the "breaker" out, the voltage still varies
with rpm ... the voltmeter is on the battery bus, if it really was
disconnected from the generator it should not fluctuate.
Hence at low rpm the generator becomes a motor drawing a very large
current dragging your battery volts down to 15V (should be ~24V if
offline).
Simple way to check this (engine OFF) is just turn the Battery master ON
& if the Generator Offline warning light remains OFF and/or the ammeter
shows a large drain current, then we've ID'd the problem (or at least
one of them).
However this does not necessarily explain why your voltage regulation is
not limiting the generator output to 27~28V. I suspect there's another
problem here which could range from a bad connection or blown fuse
(why?) through carbon pile regulator / stabilising transformer / OV
control failure.
If I'm right then at best this is going to need the DMR-200D (aptly
named Complex Control device that contains the Contactor) overhauled /
replaced which may not be feasible on either count.
At worst ANO hard to repair / replace component has also failed ... so
ultimately your best bet may be to get this one modified to a B&C fit
too.
Anyway if you could try out the above check we can see if I'm even in
the right ball park on this one.
Cheers, Rob R
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374685#374685
Message 3
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
The line drawing on the 50amp unit said is only produced 50 amps at
6000RPM ... how often does an M14 spin at 6000RPM?
http://www.bandc.biz/pdfs/sk50_outline.pdf
Is that a consideration?
On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E wrote:
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E"<mark.bitterlich@navy.mil>
>
> You betcha!
>
> I am very impressed with the B&C SK35 with the LS1A regulator. I have
> installed that model in a few aircraft, the latest being a Sukhoi 26.
> If anyone needs help doing that, email me. Oh, yes B&C also makes a
> higher current alternator if you want that. I believe it is the SK50.
>
> Cost is about $1000 plus or minus.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
> Sent: Monday, June 04, 2012 2:03 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>
> Mark,
>
> As an alternative, it is possible to replace the generator on the M-14P
> with a lightweight 35 amp or 50 amp alternator.
>
> http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>
> http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>
> The companion solid sate voltage regulator weighs only 9 ozs.
>
> http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
>
> These were designed for the M-14P and are what I am using. This doesn't
> fix your immediate problem, but is another approach using current
> technology.
>
> Warren Hill
> N464TW
>
>
> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>
>
> Gentlemen,
>
> I have read in past posts about the over voltage
> scenario and feel I am dealing with the same problem.
>
> I have two Yak 55's one with the original system and one
> with a B&C. I'm having problems with the original system and
> generator.
>
> Problem: 30v at flight RPM. Trips off (AKKyM) circuit
> breaker removing all power from the system as designed.
>
> Batteries show good on load test
>
> Voltage when (AKKyM) is out, still registers 30v at
> flight RPM and decreases to 15V at idle verifying batteries are off
> line.
>
> Question: How to adjust voltage regulator on original
> style Yak 55M if this is the likely problem?
>
>
>
>
>
> Sincerely,
>
> Mark Sorenson
> 678-463-5944
> www.tigerairshows.com<http://www.tigerairshows.com/>
>
>
> 3D=======================
> 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">ht
> tp://www.matronics.com/Navigator?Yak-List
>
> 3D=======================
> 3D====================
>
> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.matr
> onics.com
>
> 3D=======================
> 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http://w
> ww.matronics.com/contribution
>
> 3D=======================
> 3D====================
>
>
>
Message 4
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| Subject: | Yak 55M Voltage regulator Overvoltage? |
Generator is geared to spin faster than the engine. Manual shows 4000 to
9000 rpm for generator.
Gill
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of William Halverson
Sent: Tuesday, June 05, 2012 10:34 AM
Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
The line drawing on the 50amp unit said is only produced 50 amps at 6000RPM
... how often does an M14 spin at 6000RPM?
http://www.bandc.biz/pdfs/sk50_outline.pdf
Is that a consideration?
On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
wrote:
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry
> --> Point, MALS-14 64E"<mark.bitterlich@navy.mil>
>
> You betcha!
>
> I am very impressed with the B&C SK35 with the LS1A regulator. I have
> installed that model in a few aircraft, the latest being a Sukhoi 26.
> If anyone needs help doing that, email me. Oh, yes B&C also makes a
> higher current alternator if you want that. I believe it is the SK50.
>
> Cost is about $1000 plus or minus.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
> Sent: Monday, June 04, 2012 2:03 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>
> Mark,
>
> As an alternative, it is possible to replace the generator on the
> M-14P with a lightweight 35 amp or 50 amp alternator.
>
> http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>
> http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>
> The companion solid sate voltage regulator weighs only 9 ozs.
>
>
> http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
>
> These were designed for the M-14P and are what I am using. This
> doesn't fix your immediate problem, but is another approach using
> current technology.
>
> Warren Hill
> N464TW
>
>
> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>
>
> Gentlemen,
>
> I have read in past posts about the over voltage scenario
and feel I
> am dealing with the same problem.
>
> I have two Yak 55's one with the original system and one
with a B&C.
> I'm having problems with the original system and generator.
>
> Problem: 30v at flight RPM. Trips off (AKKyM) circuit
breaker
> removing all power from the system as designed.
>
> Batteries show good on load test
>
> Voltage when (AKKyM) is out, still registers 30v at flight
RPM and
> decreases to 15V at idle verifying batteries are off line.
>
> Question: How to adjust voltage regulator on original style
Yak 55M
> if this is the likely problem?
>
>
>
>
>
> Sincerely,
>
> Mark Sorenson
> 678-463-5944
> www.tigerairshows.com<http://www.tigerairshows.com/>
>
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">
> ht tp://www.matronics.com/Navigator?Yak-List
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.ma
> tr
> onics.com
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http:/
> /w
> ww.matronics.com/contribution
>
> 3D=======================3
> D= 3D====================
>
>
>
Message 5
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| Subject: | Yak 55M Voltage regulator Overvoltage? |
The generator/alternator turns 2.5 times faster than the engine crankshaft.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of William Halverson
Sent: Tuesday, June 05, 2012 1:34 PM
Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
The line drawing on the 50amp unit said is only produced 50 amps at 6000RPM
... how often does an M14 spin at 6000RPM?
http://www.bandc.biz/pdfs/sk50_outline.pdf
Is that a consideration?
On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
wrote:
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry
> --> Point, MALS-14 64E"<mark.bitterlich@navy.mil>
>
> You betcha!
>
> I am very impressed with the B&C SK35 with the LS1A regulator. I have
> installed that model in a few aircraft, the latest being a Sukhoi 26.
> If anyone needs help doing that, email me. Oh, yes B&C also makes a
> higher current alternator if you want that. I believe it is the SK50.
>
> Cost is about $1000 plus or minus.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
> Sent: Monday, June 04, 2012 2:03 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>
> Mark,
>
> As an alternative, it is possible to replace the generator on the
> M-14P with a lightweight 35 amp or 50 amp alternator.
>
> http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>
> http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>
> The companion solid sate voltage regulator weighs only 9 ozs.
>
>
> http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
>
> These were designed for the M-14P and are what I am using. This
> doesn't fix your immediate problem, but is another approach using
> current technology.
>
> Warren Hill
> N464TW
>
>
> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>
>
> Gentlemen,
>
> I have read in past posts about the over voltage scenario
and feel I
> am dealing with the same problem.
>
> I have two Yak 55's one with the original system and one
with a B&C.
> I'm having problems with the original system and generator.
>
> Problem: 30v at flight RPM. Trips off (AKKyM) circuit
breaker
> removing all power from the system as designed.
>
> Batteries show good on load test
>
> Voltage when (AKKyM) is out, still registers 30v at flight
RPM and
> decreases to 15V at idle verifying batteries are off line.
>
> Question: How to adjust voltage regulator on original style
Yak 55M
> if this is the likely problem?
>
>
>
>
>
> Sincerely,
>
> Mark Sorenson
> 678-463-5944
> www.tigerairshows.com<http://www.tigerairshows.com/>
>
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">
> ht tp://www.matronics.com/Navigator?Yak-List
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.ma
> tr
> onics.com
>
> 3D=======================3
> D= 3D====================
>
> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http:/
> /w
> ww.matronics.com/contribution
>
> 3D=======================3
> D= 3D====================
>
>
>
Message 6
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
On Tue, Jun 5, 2012 at 10:00 AM, Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E <mark.bitterlich@navy.mil> wrote:
> MALS-14 64E" <mark.bitterlich@navy.mil>
>
> Rob, I think his voltage measurements were at the generator and not the
> main bus. Don't know that for sure, but I think so.
>
> This would make 15 volts at idle pretty normal. (The DMR-200 would open
> and you would be reading straight generator voltage)
>
> If the main contactor was indeed fused closed, when the engine stopped,
> it should blow the main battery fuse, because at that point the "motor"
> would not be spinning and would represent a dead short to ground, or
> darn close to it.
>
> Agreed?
>
That is certainly what I would expect if the cutout relay (what I think you
are calling the main contactor) were to weld closed. It is intended to open
when current starts to flow from bus to generator armature rather than the
other way around. OTOH, the overcurrent relay would probably prevent
serious damage.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
Message 7
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
On Tue, Jun 5, 2012 at 10:34 AM, William Halverson <william@netpros.net>wrote:
>
> The line drawing on the 50amp unit said is only produced 50 amps at
> 6000RPM ... how often does an M14 spin at 6000RPM?
>
Shaft RPM on the generator is not usually crank RPM. The generator drive is
usually geared up so that there is sufficient RPM at the generator to
provide full output at crank RPMs below crank RPM redline.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
Message 8
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
I think they meant the crank sht in the alternator spins 6000 rpms not- t
he prop
-
--- On Tue, 6/5/12, William Halverson <william@netpros.net> wrote:
From: William Halverson <william@netpros.net>
Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
The line drawing on the 50amp unit said is only produced 50 amps at
6000RPM ... how often does an M14 spin at 6000RPM?
http://www.bandc.biz/pdfs/sk50_outline.pdf
Is that a consideration?
On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E wrote:
> -->- Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Poi
nt, MALS-14 64E"<mark.bitterlich@navy.mil>
>
> You betcha!
>
> I am very impressed with the B&C SK35 with the LS1A regulator.- I have
> installed that model in a few aircraft, the latest being a Sukhoi 26.
> If anyone needs help doing that, email me.- Oh, yes B&C also makes a
> higher current alternator if you want that.- I believe it is the SK50.
>
> Cost is about $1000 plus or minus.
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
> Sent: Monday, June 04, 2012 2:03 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>
> Mark,
>
> As an alternative, it is possible to replace the generator on the M-14P
> with a lightweight 35 amp or 50 amp alternator.
>
>- ---http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>
>- ---http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>
> The companion solid sate voltage regulator weighs only 9 ozs.
>
>- ---http://www.bandc.biz/alternatorcontrollerregulator28vhomebuil
t1.aspx
>
> These were designed for the M-14P and are what I am using. This doesn't
> fix your immediate problem, but is another approach using current
> technology.
>
> Warren Hill
> N464TW
>
>
> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>
>
> --- --- Gentlemen,
> --- ---
> --- --- I have read in past posts about the over voltage
> scenario and feel I am dealing with the same problem.
> --- ---
> --- --- I have two Yak 55's one with the original system and
one
> with a B&C.- I'm having problems with the original system and
> generator.
> --- ---
> --- --- Problem:- 30v at flight RPM. Trips off (AKKyM) circ
uit
> breaker removing all power from the system as designed.
> --- ---
> --- --- Batteries show good on load test
> --- ---
> --- --- Voltage when (AKKyM) is out, still registers 30v at
> flight RPM and decreases to 15V at idle verifying batteries are off
> line.
> --- ---
> --- --- Question:- How to adjust voltage regulator on origi
nal
> style Yak 55M if this is the likely problem?
> --- ---
> --- ---
> --- ---
>
>
> --- Sincerely,
>
> --- Mark Sorenson
> --- 678-463-5944
> --- www.tigerairshows.com<http://www.tigerairshows.com/>
> ---
> ---
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D
> ---
> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">h
t
> tp://www.matronics.com/Navigator?Yak-List
> ---
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D
> ---
> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.mat
r
> onics.com
> ---
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D
> ---
> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http://
w
> ww.matronics.com/contribution
> ---
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> 3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=3D=3D=3D=3D=3D=3D=3D
> ---
>
>
le, List Admin.
Message 9
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
I think you're forgetting about the gearing.
From the M14 maintenance manual - Note the rotation speed.
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 6/5/2012 12:34 PM, William Halverson wrote:
>
> The line drawing on the 50amp unit said is only produced 50 amps at
> 6000RPM ... how often does an M14 spin at 6000RPM?
>
> http://www.bandc.biz/pdfs/sk50_outline.pdf
>
>
> Is that a consideration?
>
>
> On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14
> 64E wrote:
>> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry
>> Point, MALS-14 64E"<mark.bitterlich@navy.mil>
>>
>> You betcha!
>>
>> I am very impressed with the B&C SK35 with the LS1A regulator. I have
>> installed that model in a few aircraft, the latest being a Sukhoi 26.
>> If anyone needs help doing that, email me. Oh, yes B&C also makes a
>> higher current alternator if you want that. I believe it is the SK50.
>>
>> Cost is about $1000 plus or minus.
>>
>> Mark
>>
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
>> Sent: Monday, June 04, 2012 2:03 PM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>>
>> Mark,
>>
>> As an alternative, it is possible to replace the generator on the M-14P
>> with a lightweight 35 amp or 50 amp alternator.
>>
>> http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>>
>> http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>>
>> The companion solid sate voltage regulator weighs only 9 ozs.
>>
>> http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
>>
>> These were designed for the M-14P and are what I am using. This doesn't
>> fix your immediate problem, but is another approach using current
>> technology.
>>
>> Warren Hill
>> N464TW
>>
>>
>>
>> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>>
>>
>> Gentlemen,
>>
>> I have read in past posts about the over voltage
>> scenario and feel I am dealing with the same problem.
>>
>> I have two Yak 55's one with the original system and one
>> with a B&C. I'm having problems with the original system and
>> generator.
>>
>> Problem: 30v at flight RPM. Trips off (AKKyM) circuit
>> breaker removing all power from the system as designed.
>>
>> Batteries show good on load test
>>
>> Voltage when (AKKyM) is out, still registers 30v at
>> flight RPM and decreases to 15V at idle verifying batteries are off
>> line.
>>
>> Question: How to adjust voltage regulator on original
>> style Yak 55M if this is the likely problem?
>>
>>
>>
>>
>>
>> Sincerely,
>>
>> Mark Sorenson
>> 678-463-5944
>> www.tigerairshows.com<http://www.tigerairshows.com/>
>>
>>
>> 3D=======================
>> 3D====================
>>
>> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">ht
>> tp://www.matronics.com/Navigator?Yak-List
>>
>> 3D=======================
>> 3D====================
>>
>> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.matr
>> onics.com
>>
>> 3D=======================
>> 3D====================
>>
>> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http://w
>> ww.matronics.com/contribution
>>
>> 3D=======================
>> 3D====================
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 10
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
OK thanks!
On 6/5/2012 11:01 AM, Brian Lloyd wrote:
>
>
> On Tue, Jun 5, 2012 at 10:34 AM, William Halverson
> <william@netpros.net <mailto:william@netpros.net>> wrote:
>
> <william@netpros.net <mailto:william@netpros.net>>
>
> The line drawing on the 50amp unit said is only produced 50 amps
> at 6000RPM ... how often does an M14 spin at 6000RPM?
>
>
> Shaft RPM on the generator is not usually crank RPM. The generator
> drive is usually geared up so that there is sufficient RPM at the
> generator to provide full output at crank RPMs below crank RPM redline.
>
> --
> Brian Lloyd, WB6RQN/J79BPL
> 3191 Western Dr.
> Cameron Park, CA 95682
> brian@lloyd.com <mailto:brian@lloyd.com>
> +1.767.617.1365 (Dominica)
> +1.916.877.5067 (USA)
>
> *
>
>
> *
Message 11
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
OK Thanks!
On 6/5/2012 10:59 AM, Gill Gutierrez wrote:
> --> Yak-List message posted by: "Gill Gutierrez"<gill.g@gpimail.com>
>
> Generator is geared to spin faster than the engine. Manual shows 4000 to
> 9000 rpm for generator.
>
> Gill
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com] On Behalf Of William Halverson
> Sent: Tuesday, June 05, 2012 10:34 AM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>
> --> Yak-List message posted by: William Halverson<william@netpros.net>
>
> The line drawing on the 50amp unit said is only produced 50 amps at 6000RPM
> ... how often does an M14 spin at 6000RPM?
>
> http://www.bandc.biz/pdfs/sk50_outline.pdf
>
>
> Is that a consideration?
>
>
> On 6/5/2012 9:54 AM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
> wrote:
>> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry
>> --> Point, MALS-14 64E"<mark.bitterlich@navy.mil>
>>
>> You betcha!
>>
>> I am very impressed with the B&C SK35 with the LS1A regulator. I have
>> installed that model in a few aircraft, the latest being a Sukhoi 26.
>> If anyone needs help doing that, email me. Oh, yes B&C also makes a
>> higher current alternator if you want that. I believe it is the SK50.
>>
>> Cost is about $1000 plus or minus.
>>
>> Mark
>>
>>
>> -----Original Message-----
>> From: owner-yak-list-server@matronics.com
>> [mailto:owner-yak-list-server@matronics.com] On Behalf Of Warren Hill
>> Sent: Monday, June 04, 2012 2:03 PM
>> To: yak-list@matronics.com
>> Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
>>
>> Mark,
>>
>> As an alternative, it is possible to replace the generator on the
>> M-14P with a lightweight 35 amp or 50 amp alternator.
>>
>> http://www.bandc.biz/alternatorform14p35ampshomebuilt.aspx
>>
>> http://www.bandc.biz/alternatorform14p50ampshomebuilt.aspx
>>
>> The companion solid sate voltage regulator weighs only 9 ozs.
>>
>>
>> http://www.bandc.biz/alternatorcontrollerregulator28vhomebuilt1.aspx
>>
>> These were designed for the M-14P and are what I am using. This
>> doesn't fix your immediate problem, but is another approach using
>> current technology.
>>
>> Warren Hill
>> N464TW
>>
>>
>>
>> On Jun 3, 2012, at 7:38 AM, Mark Sorenson wrote:
>>
>>
>> Gentlemen,
>>
>> I have read in past posts about the over voltage scenario
> and feel I
>> am dealing with the same problem.
>>
>> I have two Yak 55's one with the original system and one
> with a B&C.
>> I'm having problems with the original system and generator.
>>
>> Problem: 30v at flight RPM. Trips off (AKKyM) circuit
> breaker
>> removing all power from the system as designed.
>>
>> Batteries show good on load test
>>
>> Voltage when (AKKyM) is out, still registers 30v at flight
> RPM and
>> decreases to 15V at idle verifying batteries are off line.
>>
>> Question: How to adjust voltage regulator on original style
> Yak 55M
>> if this is the likely problem?
>>
>>
>>
>>
>>
>> Sincerely,
>>
>> Mark Sorenson
>> 678-463-5944
>> www.tigerairshows.com<http://www.tigerairshows.com/>
>>
>>
>> 3D=======================3
>> D= 3D====================
>>
>> href="x-msg://29/3D%22http://www.matronics.com/Navigator?Yak-List%22">
>> ht tp://www.matronics.com/Navigator?Yak-List
>>
>> 3D=======================3
>> D= 3D====================
>>
>> href="x-msg://29/3D%22http://forums.matronics.com%22">http://forums.ma
>> tr
>> onics.com
>>
>> 3D=======================3
>> D= 3D====================
>>
>> href="x-msg://29/3D%22http://www.matronics.com/contribution%22">http:/
>> /w
>> ww.matronics.com/contribution
>>
>> 3D=======================3
>> D= 3D====================
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
Message 12
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| Subject: | Accessory case more pix |
Another view. Mag at 1200. To left is the generator and to the right is the c
ompressor drive.
Doc
Sent from my iPad
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 13
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| Subject: | Generator splined gear drive |
Looking at the picture: 1200 is a oil channel. Deep to that is the drive sha
ft for the generator. To see the drive for the generator You need to flip th
e accessory case over and pull the inspection plate. At 1000 & 0200 are the g
ears for the mags. At 0700 is the drive for the compressor. At 0600 is the d
rive shaft for the oil pump & the fuel pump. At 0500 is the drive for the ai
r start octopus. If memory serves correct.
Doc
Sent from my iPad
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 14
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| Subject: | More accessory case |
Oil pump at 1200.
Better to see the anatomy to understand the physiology (the mechanics).
Doc
Sent from my iPad
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 15
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Correction, on the first photo, the 0500 in the fore ground is the tach drive shaft.
Behind that is the air start drive deep to the the tach drive.
Sorry,
Doc
Sent from my iPad
Message 16
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
>
> mark.bitterlich(at)navy.m Posted: Tue Jun 05, 2012 5:03 pm
> ...
> If the main contactor was indeed fused closed, when the engine stopped,
> it should blow the main battery fuse, because at that point the "motor"
> would not be spinning and would represent a dead short to ground, or
> darn close to it.
> ...
>
Fair point Mark, but with the differential shunt relay in series (as Brian mentioned)
plus battery internal resistance, generator windings etc only needs to
be collectively c.1ohm and the current gets limited to 20+Amps, maybe not enough
to take the main fuse out.
With the differential shunt (reverse current) relay needing 10-25 Amps (from spec)
to operate anyway then a corroded / loose connection could readily add a few
ohms and prevent the contactor release from even being triggered.
Have just noted the -55M doesn't have an ammeter as standard fit, so scratch that
check option.
Anyway let's see what Mark S come back with, if nothing else it will at least help
eliminate this from the potential fault list [Wink]
Cheers, Rob R
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374812#374812
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