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billlang(at)live.com.au
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 Posted: Wed Jun 02, 2010 8:39 pm Post subject: Yak 52 Starter Sequence? |
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The mechanic is working on the spider now. He asked me to ask if anyone knows the number of degrees of prop rotation from TDC to set the spider at, or any other advice for setting it. The instuctions from the M14 manual are a bit ambiguous. (no access to Housai Manual)
Bill
From: gill.g(at)gpimail.com
To: yak-list(at)matronics.com
Subject: RE: Yak-List: Yak 52 Starter Sequence?
Date: Fri, 9 Apr 2010 09:54:17 -0700
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If you have access to a Housai manual, it provides better instructions as it has a diagram. The difference relates to prop gearing. I have reset mine twice after engine disassembly and it’s not a big deal.
Gill
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Yak Pilot
Sent: Thursday, April 08, 2010 5:50 PM
To: yak-list(at)matronics.com
Subject: RE: Yak 52 Starter Sequence?
GOOD FOR YOU! Good job in finding the proper task cards!
Let me run my mouth one last time. First, adjusting this thing is a real pain in the ass. It is hard to get to the nuts and stuff to remove it, it requires you to get the engine set up perfectly, and then insert the thing back in and tighten it down. I have been involved in adjusting it twice, and it was a real ass kicker.
Next... make darn sure... let me correct that: MAKE DAMN SURE that you know this is the problem before you remove it from the engine and start trying to re-adjust it. Once you remove it, you have no choice but to finish the job.
I am not kidding when I tell you that a flow restriction in the air system will cause the exact same problem that you are reporting.
Yes, it is most likely that someone messed with this in the past, and just could never get it right again, and this is what you have wrong now. (I.E. A misadjusted Air Distributor) The odds are good that this is your problem, but as a Tech Rep, my mind always considers the alternatives and you can never rule out ANYTHING unless you verify it as a "known good". That said, if your AIR FLOW to this unit is low, it will do the exact same thing you are now reporting.
That said, if I was there, I would take my nitrogen bottle with a good regulator and would connect it DIRECTLY to the line going to the air distributor and would set it to 730 PSI and would see what happened when I turned it on. If the engine does the exact same thing, then you are sure that the distributor is the problem. However, if the engine spins right around perfectly, then you can STOP RIGHT THERE and say "BOY OH BOY IT IS NOT THE AIR DISTRIBUTOR" and you have saved yourself one HUGE amount of work.
Consider this advice carefully.
Best regards,
Mark Bitterlich
--- On Thu, 4/8/10, Bill Lang <billlang(at)live.com.au> wrote:
[quote]
From: Bill Lang <billlang(at)live.com.au>
Subject: RE: Yak 52 Starter Sequence?
To: "Yak List" <yak-list(at)matronics.com>
Date: Thursday, April 8, 2010, 7:12 PM
Mark
Further to my last.. found the ref on George's web site M14 maint Manual, task card 204. Hope my guy
can do it.
Thanks
Bill
[quote] Subject: RE: Yak 52 Starter Sequence?
Date: Thu, 8 Apr 2010 12:53:38 -0400
From: mark.bitterlich(at)navy.mil
To: yak-list(at)matronics.com
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich(at)navy.mil>
MOST LIKELY: Your air distributor is out of alignment.
This is a tedious and exacting job. VERY TEDIOUS AND VERY EXACTING!
There is a little gear in there with many little itsy tiny teeth that
has to be JUST right.
I would suggest you contact Dennis Savarese directly, I believe he has
the procedure written out and ready to send. It is addressed in the
maint. Cards for the engine. It might also be at George Coy's web site.
His site is also a wealth of knowledge.
It is much MUCH more complicated than just spinning it 180 degrees, SAD
TO SAY! Without the instructions, I have seen people mess with this
thing for days. DAYS!
Just FYI, the thing does more than just put air into a cylinder to make
the piston move. When it is perfectly set up, it not only puts air into
one cylinder to push the piston down, it also sends air to the lower
cylinders WITH THE EXHAUST VALVES OPEN to help push any oil that is in
there right out the exhaust. But it has to be timed PERFECTLY to the
engine, just like the ignition distributor on your car, or the mag on
your airplane. Please excuse the language on the net, but it is a real
SOB to adjust.
I am sorry that I do not have the instructions to give you, or have them
memorized... But I will tell you to not even think about messing with it
until you have the instructions fully in hand and understand them
perfectly.
Mark Bitterlich
--
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gill.g(at)gpimail.com
Guest
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| Posted: Thu Jun 03, 2010 9:00 am Post subject: Yak 52 Starter Sequence? |
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Bill,
Prop degrees for Housai is 9 degrees, for M14P 8 degrees, both on #4 cylinder after TDC.
Gill
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Bill Lang
Sent: Wednesday, June 02, 2010 9:38 PM
To: Yak List
Subject: RE: Yak 52 Starter Sequence?
The mechanic is working on the spider now. He asked me to ask if anyone knows the number of degrees of prop rotation from TDC to set the spider at, or any other advice for setting it. The instuctions from the M14 manual are a bit ambiguous. (no access to Housai Manual)
Bill
From: gill.g(at)gpimail.com
To: yak-list(at)matronics.com
Subject: RE: Yak 52 Starter Sequence?
Date: Fri, 9 Apr 2010 09:54:17 -0700
If you have access to a Housai manual, it provides better instructions as it has a diagram. The difference relates to prop gearing. I have reset mine twice after engine disassembly and it’s not a big deal.
Gill
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Yak Pilot
Sent: Thursday, April 08, 2010 5:50 PM
To: yak-list(at)matronics.com
Subject: RE: Yak 52 Starter Sequence?
GOOD FOR YOU! Good job in finding the proper task cards!
Let me run my mouth one last time. First, adjusting this thing is a real pain in the ass. It is hard to get to the nuts and stuff to remove it, it requires you to get the engine set up perfectly, and then insert the thing back in and tighten it down. I have been involved in adjusting it twice, and it was a real ass kicker.
Next... make darn sure... let me correct that: MAKE DAMN SURE that you know this is the problem before you remove it from the engine and start trying to re-adjust it. Once you remove it, you have no choice but to finish the job.
I am not kidding when I tell you that a flow restriction in the air system will cause the exact same problem that you are reporting.
Yes, it is most likely that someone messed with this in the past, and just could never get it right again, and this is what you have wrong now. (I.E. A misadjusted Air Distributor) The odds are good that this is your problem, but as a Tech Rep, my mind always considers the alternatives and you can never rule out ANYTHING unless you verify it as a "known good". That said, if your AIR FLOW to this unit is low, it will do the exact same thing you are now reporting.
That said, if I was there, I would take my nitrogen bottle with a good regulator and would connect it DIRECTLY to the line going to the air distributor and would set it to 730 PSI and would see what happened when I turned it on. If the engine does the exact same thing, then you are sure that the distributor is the problem. However, if the engine spins right around perfectly, then you can STOP RIGHT THERE and say "BOY OH BOY IT IS NOT THE AIR DISTRIBUTOR" and you have saved yourself one HUGE amount of work.
Consider this advice carefully.
Best regards,
Mark Bitterlich
--- On Thu, 4/8/10, Bill Lang <billlang(at)live.com.au> wrote:
[quote]
From: Bill Lang <billlang(at)live.com.au>
Subject: RE: Yak 52 Starter Sequence?
To: "Yak List" <yak-list(at)matronics.com>
Date: Thursday, April 8, 2010, 7:12 PM
Mark
Further to my last.. found the ref on George's web site M14 maint Manual, task card 204. Hope my guy
can do it.
Thanks
Bill
> Subject: RE: Yak 52 Starter Sequence?
> Date: Thu, 8 Apr 2010 12:53:38 -0400
> From: mark.bitterlich(at)navy.mil
> To: yak-list(at)matronics.com
>
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" <mark.bitterlich(at)navy.mil>
>
>
>
> MOST LIKELY: Your air distributor is out of alignment.
>
> This is a tedious and exacting job. VERY TEDIOUS AND VERY EXACTING!
>
> There is a little gear in there with many little itsy tiny teeth that
> has to be JUST right.
>
> I would suggest you contact Dennis Savarese directly, I believe he has
> the procedure written out and ready to send. It is addressed in the
> maint. Cards for the engine. It might also be at George Coy's web site.
> His site is also a wealth of knowledge.
>
> It is much MUCH more complicated than just spinning it 180 degrees, SAD
> TO SAY! Without the instructions, I have seen people mess with this
> thing for days. DAYS!
>
> Just FYI, the thing does more than just put air into a cylinder to make
> the piston move. When it is perfectly set up, it not only puts air into
> one cylinder to push the piston down, it also sends air to the lower
> cylinders WITH THE EXHAUST VALVES OPEN to help push any oil that is in
> there right out the exhaust. But it has to be timed PERFECTLY to the
> engine, just like the ignition distributor on your car, or the mag on
> your airplane. Please excuse the language on the net, but it is a real
> SOB to adjust.
>
> I am sorry that I do not have the instructions to give you, or have them
> memorized... But I will tell you to not even think about messing with it
> until you have the instructions fully in hand and understand them
> perfectly.
>
> Mark Bitterlich
>
>
> --
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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