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nigel(at)yakdisplay.com
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 Posted: Mon Apr 04, 2011 2:02 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Thought I'd call on the power of the list.
Two separate enquiries re Yak52.
1. Have had several compressor failures in the last two years - shear pins (rivets) sheared in each case. Replaced each time with correct spec replacements. Compressor itself appears to be fine each time, goes a few hours before the next failure - although never after the same number of hours. Any ideas any one? Anything else to check (apart from replacing the compressor).
2. I've heard that U/C bulbs can be sourced from someone like LUCAS - and all that is required is for the lugs to be filed off. Does anyone know the part number for the official replacement from such a source or similar?
Thanks
Nigel
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dabear(at)devere.us
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| Posted: Mon Apr 04, 2011 3:27 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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You’ll need to overhaul the compressor. That is the reason it keeps popping the shear pins. Been there done that.
Bear
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Nigel Willson
Sent: Monday, April 04, 2011 5:49 PM
To: yak-list(at)matronics.com
Subject: Yak52: Compressor - and replacement U/G bulbs
Thought I'd call on the power of the list.
Two separate enquiries re Yak52.
1. Have had several compressor failures in the last two years - shear pins (rivets) sheared in each case. Replaced each time with correct spec replacements. Compressor itself appears to be fine each time, goes a few hours before the next failure - although never after the same number of hours. Any ideas any one? Anything else to check (apart from replacing the compressor).
2. I've heard that U/C bulbs can be sourced from someone like LUCAS - and all that is required is for the lugs to be filed off. Does anyone know the part number for the official replacement from such a source or similar?
Thanks
Nigel
~
[quote][b]
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JOE HOWSE
Joined: 10 Jan 2006
Posts: 140
Location: DUNCAN BC CANADA
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| Posted: Mon Apr 04, 2011 5:38 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Do you ever start with the mags on?
[quote][b]
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mikeholoman(at)hotmail.co
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| Posted: Mon Apr 04, 2011 6:54 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Do you run your engine at any point of your flying above 80% for more than 5 minutes? Like in an extended climb.
From: joeh(at)shaw.ca
To: yak-list(at)matronics.com
Subject: Re: Yak52: Compressor - and replacement U/G bulbs
Date: Mon, 4 Apr 2011 18:35:47 -0700
Do you ever start with the mags on?
[quote]
rget=_blank>http://www.matronics.com/Navigator?Yak-List
ttp://forums.matronics.com
=_blank>http://www.matronics.com/contribution
[b]
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tigeryak18t
Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE
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| Posted: Mon Apr 04, 2011 8:53 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Do you turn off the engine with respect of the procedures.......under 160degre Celsius ....... Without backfire ???
Didier Blouzard
+33 6 2424 3672
Le 4 avr. 2011 à 23:48, "Nigel Willson" <nigel(at)yakdisplay.com> a écrit :
| Quote: |
Thought I'd call on the power of the list.
Two separate enquiries re Yak52.
1. Have had several compressor failures in the last two years - shear pins (rivets) sheared in each case. Replaced each time with correct spec replacements. Compressor itself appears to be fine each time, goes a few hours before the next failure - although never after the same number of hours. Any ideas any one? Anything else to check (apart from replacing the compressor).
2. I've heard that U/C bulbs can be sourced from someone like LUCAS - and all that is required is for the lugs to be filed off. Does anyone know the part number for the official replacement from such a source or similar?
Thanks
Nigel
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Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing |
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nigel(at)yakdisplay.com
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| Posted: Mon Apr 04, 2011 11:08 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Yes. Cooled to below 150, and it never backfires
--
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nigel(at)yakdisplay.com
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| Posted: Mon Apr 04, 2011 11:08 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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No. Only take off at 100%. Then almost immediately 80/80.
It does a lot of aeros but only at MCP (82%/Full Throttle).
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Mike Holoman
Sent: 05 April 2011 03:52
To: Matronics Yaks
Subject: RE: Yak52: Compressor - and replacement U/G bulbs
Do you run your engine at any point of your flying above 80% for more than 5 minutes? Like in an extended climb.
From: joeh(at)shaw.ca
To: yak-list(at)matronics.com
Subject: Re: Yak52: Compressor - and replacement U/G bulbs
Date: Mon, 4 Apr 2011 18:35:47 -0700
Do you ever start with the mags on?
01234567890123
[quote][b]
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nigel(at)yakdisplay.com
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| Posted: Mon Apr 04, 2011 11:10 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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OK. That was the next step. Assume that cured the problem?
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of dabear
Sent: 05 April 2011 00:23
To: yak-list(at)matronics.com
Subject: RE: Yak52: Compressor - and replacement U/G bulbs
You’ll need to overhaul the compressor. That is the reason it keeps popping the shear pins. Been there done that.
Bear
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Nigel Willson
Sent: Monday, April 04, 2011 5:49 PM
To: yak-list(at)matronics.com
Subject: Yak52: Compressor - and replacement U/G bulbs
Thought I'd call on the power of the list.
Two separate enquiries re Yak52.
1. Have had several compressor failures in the last two years - shear pins (rivets) sheared in each case. Replaced each time with correct spec replacements. Compressor itself appears to be fine each time, goes a few hours before the next failure - although never after the same number of hours. Any ideas any one? Anything else to check (apart from replacing the compressor).
2. I've heard that U/C bulbs can be sourced from someone like LUCAS - and all that is required is for the lugs to be filed off. Does anyone know the part number for the official replacement from such a source or similar?
Thanks
Nigel
~
| Quote: | | http://www.matronics.com/Navigator?Yak-List |
0123456789
[quote][b]
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nigel(at)yakdisplay.com
Guest
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| Posted: Mon Apr 04, 2011 11:11 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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No. Always on the shower, then the mags.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Joe Howse
Sent: 05 April 2011 02:36
To: yak-list(at)matronics.com
Subject: Re: Yak52: Compressor - and replacement U/G bulbs
Do you ever start with the mags on?
| Quote: | | http://www.matronics.com/Navigator?Yak-List |
01234567
[quote][b]
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tigeryak18t
Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE
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| Posted: Mon Apr 04, 2011 11:28 pm Post subject: Yak52: Compressor - and replacement U/G bulbs |
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OK so you have to overhaul your compressor. The bog deal is to unmount the six screws. You will need to have the bended tool or to make it.
These screws are so difficult to reach and tight that most time they are not tighten as they should.
After the compressor itself is not a big deal
BTW, unmounting is OK but mounting is another thing.
Russian make the unmounting overhauling and remounting in about half a day.
Better count two days.
Didier
2011/4/5 Nigel Willson <nigel(at)yakdisplay.com (nigel(at)yakdisplay.com)>
[quote] --> Yak-List message posted by: "Nigel Willson" <nigel(at)yakdisplay.com (nigel(at)yakdisplay.com)>
Yes. Cooled to below 150, and it never backfires
--
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http://www.matronics.com/Navigator?Yak-List |
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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing |
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dsavarese0812(at)bellsout
Guest
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| Posted: Tue Apr 05, 2011 3:25 am Post subject: Yak52: Compressor - and replacement U/G bulbs |
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Totally agree regarding the compressor. Or replace it with a new one of
course.
Regarding the bulbs, OSRAM 3899 is a direct replacement and has the
correct case and bayonet.
Dennis
On 4/4/2011 6:22 PM, dabear wrote:
| Quote: |
You’ll need to overhaul the compressor. That is the reason it keeps
popping the shear pins. Been there done that.
Bear
*From:*owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] *On Behalf Of *Nigel Willson
*Sent:* Monday, April 04, 2011 5:49 PM
*To:* yak-list(at)matronics.com
*Subject:* Yak52: Compressor - and replacement U/G bulbs
Thought I'd call on the power of the list.
Two separate enquiries re Yak52.
1. Have had several compressor failures in the last two years - shear
pins (rivets) sheared in each case. Replaced each time with correct
spec replacements. Compressor itself appears to be fine each time,
goes a few hours before the next failure - although never after the
same number of hours. Any ideas any one? Anything else to check (apart
from replacing the compressor).
2. I've heard that U/C bulbs can be sourced from someone like LUCAS -
and all that is required is for the lugs to be filed off. Does anyone
know the part number for the official replacement from such a source
or similar?
Thanks
Nigel
~
------------------------------------------------------------------------
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