Today's Message Index:
----------------------
1. 12:47 AM - Re: CJ-6 canopy seals (Harv)
2. 12:48 AM - Re: Conclusion to the Engine out question (Richard Goode)
3. 10:20 AM - Re: Yak 55M Voltage regulator Overvoltage? (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
4. 10:41 AM - Re: Yak 55M Voltage regulator Overvoltage? (Rob Rowe)
5. 10:44 AM - Re: Yak 55M Voltage regulator Overvoltage? (Rob Rowe)
6. 11:15 AM - Re: Yak 55M Voltage regulator Overvoltage? (Warren Hill)
7. 06:47 PM - Re: Yak 55M Voltage regulator Overvoltage? (Brian Lloyd)
Message 1
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| Subject: | Re: CJ-6 canopy seals |
Rich
Here's the link to the Woolies website who sell the canopy seal.
I dont recall the exact dia of the seal that I used (please check before ordering)
but this link is for the 8mm dia cross section seal. (They also sell 6mm
and 10mm)
The skirt of the new seal needs to be cut back with scissors before fitting and
I secured mine with some contact adhesive.
For re-assembly rivets I used the smallest automotive ali pull through ones which
worked fine and look need and tidy.
http://www.woolies-trim.co.uk/p-1256-sponge-piping.aspx
Rgs
Harv
Rich Langer wrote:
> Harv, I would very much like to know the part number from Woolies for the replacement
canopy seal.
>
>
> Thanks Rich
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374646#374646
Message 2
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| Subject: | Conclusion to the Engine out question |
I've never heard of this problem-it seems to me like poor maintenance at
sometime in the engine's past?
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bradly Banks
Sent: 04 June 2012 05:59
Subject: RE: Yak-List: Conclusion to the Engine out question
Hello Walt , the Tso is 425 odd and the TSN is around 1815 I do not have
the exact log times with me as they are now with the Caa for the
investigation.
I would recommend an inspection as it would only mean the removal of the oil
pump and then using a mirror visually inspect the 2 tab washers and the
retaining nuts. And then the re-fitting of the oil pump /fuel pump assembly.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon
Sent: 04 June 2012 05:53 AM
Subject: Re: Yak-List: Conclusion to the Engine out question
--> Yak-List message with posted by: "Walter Lannon" <wlannon@shaw.ca>
Would it be possible for Bradly and yourself to advise of engine TSO or TSN
at this gear train failure. Sounds like a very good candidate for a
periodic inspection, probably applicable to all models of the Ivchenko
engine series.
Has anyone else found a problem here? Any comments from George Coy, Richard
Broome, etc.?
Thanks;
Walt
-----Original Message-----
From: csprjm@aol.com
Sent: Sunday, June 03, 2012 7:33 PM
Subject: Re: Yak-List: Conclusion to the Engine out question
You're the second one. Happened to me last Aug in a 52TW. At 800 ft after
TO. Made it back to rwy. Shorts soiled.
Sent via BlackBerry by AT&T
-----Original Message-----
From: "Bradly Banks" <brad@runawaymedia.co.za>
Sender: owner-yak-list-server@matronics.com
Subject: Yak-List: Conclusion to the Engine out question
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Message 3
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| Subject: | Yak 55M Voltage regulator Overvoltage? |
Your posting is probably the problem, but first find the voltage regulator, once
you do, (do you need help with that?) look at it very closely, or ... better
still... take it out of the mount and examine the mount and the regulator. There
is a known problem with a wire under the bottom of the regulator that shorts
to the mounting rack itself. Basically, just take it out and look VERY carefully
for shorts before you adjust anything.
If it all looks perfectly OK, then gently tap the black things that look like heat
sinks. Take a screwdriver handle and just tap back and forth on the black
fin looking deals.
Try starting the engine and checking the voltage with the voltage regulator REMOVED!
If you still have voltage output from the generator that goes up and down
with engine RPM, then you have a short somewhere to the FIELD winding of the
generator. Most likely place to look is under the generator wiring cover.
Check to make sure all connections are tight and nothing is shorting to anything
else. Especially the field wire to the "+" wire (they are marked, the field
is in the center).
If you have no voltage with the voltage regulator removed, then put it back in
and test it again. If it is still going up to 30 volts, then adjust the regulator
as Doc suggested, but understand that small movements make BIG changes!
On the YAK-52, there is a "fine voltage adjust rheostat" that is mounted in the
cockpit and can make small adjustments to the voltage regulator itself. I do
not know if the 55 has this or not. The 50 definitely does NOT.
If you cannot adjust the voltage regulator, and it still is reading 30 volts or
higher, you need to make absolutely sure your wiring is fine (ESPECIALLY AT
THE VOLTAGE REGULATOR MOUNT!) and then find a new voltage regulator, or ... beat
on it harder at mentioned above and try it again.
That covers everything I can think of. You've done well to get as far as you have.
One thing really bothers me though.... you said you made a test with the AKKyM
over-voltage protection box (it is silver in color) REMOVED!
If you remove that box, you should NOT get ANY voltage out of the generator! The
field winding is in SERIES with that breaker and unless you jumpered some pins
(you did not say you did that, so I do not know) you should not have gotten
ANYTHING. As in no voltage out of the generator, and your cockpit meter should
have read battery voltage only.
This implies that there is a short from generator OUTPUT to the FIELD winding of
the generator somewhere. I.E.: If you remove all wiring to the generator,
and connect the + output to the center FIELD winding terminal, the generator will
do EXACTLY as you say it is doing now.
If you removed the silver over-voltage unit and STILL got generator output, then
I believe it is very likely that you have a short somewhere.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp M.D.
Sent: Sunday, June 03, 2012 11:45 AM
Subject: Re: Yak-List: Yak 55M Voltage regulator Overvoltage?
On the end of the carbon pile voltage regulator is a rheostat with a flathead screw
in the center. Mark Bitterlich will have to chime in on the direction to
rotate it if that is the same system that you have in the 55. In the 50 the regulator
is on the upper left side of the firewall above the main air bottle when
standing up in the hell hole facing forward.
doc
Sent from my iPad
On Jun 3, 2012, at 9:38 AM, Mark Sorenson <captainsorenson@hotmail.com> 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
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Message 4
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| Subject: | 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 5
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
Typical ... after two days looks like Mark Bitterlich & I have overlapped postings
by 10 minutes!
My posting addressed to 'Mark' refers to Mark S, not Mark B.
Cheers, Rob R
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374686#374686
Message 6
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| Subject: | Re: 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
>
>
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Message 7
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| Subject: | Re: Yak 55M Voltage regulator Overvoltage? |
And sometimes it is just easier to take out the generator with the
carbon-pile voltage regulator (a carbon pile? Really? Is this 1940?) and
replace it with a nice, light, simple alternator.
Just sayin'.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian@lloyd.com
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
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