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wild.blue(at)verizon.net
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 Posted: Mon Aug 04, 2008 8:38 am Post subject: OSH exhaust |
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EAA has a short film clip shot from a Yak-52TW http://www.eaa
org/video/airventure.html?videoId=1705742632.
The most interesting part is the volume of smoke (and exhaust) in the
cockpit.
Jerry Painter
Wild Blue Aviation
425-876-0865
JP(at)FlyWBA.com
www.FlyWBA.com
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Dale
Joined: 30 May 2007
Posts: 178
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| Posted: Tue Aug 05, 2008 7:10 pm Post subject: Re: OSH exhaust |
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I found a inspection cover missing above my oil cooler ( Yak-52 ). I also found several other Yaks had the same inspection cover missing when I looked at them. I was getting a lot of smoke and exhaust into my cockpit causing head aches after flying. It took me a long time to figured it out until I put in a smoke system and could see it. I purchased a digital meter from Aircraft spruce after I discovered the indicator on the business card gizmo does not work, and it was new. I was getting large doses of bad stuff. After fitting a new inspection plate and sealing around the front and rear of the oil cooler and sealing a large space between the scoop and the and the front of the cooler where it also allows the exhaust to circumvent the cooler into the wing root into the cockpit low pressure area. In cruise I now have a 0 reading on my meter and I do get some gasses when running up with the window open and steep maneuvers like high glide angles for landing. You will also find exhaust gasses coming up through the floor around the nose gear retract cylinder if not properly sealed. I used two zip ties for that.
I would caution everyone to get rid of the old dot on a card and try a digital meter. At least borrow one from someone and fly once with it.
Dale
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david(at)mcgirt.net
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| Posted: Wed Aug 06, 2008 4:30 am Post subject: OSH exhaust |
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Which Yak are you flying Dale?
Great info!
David
On 8/5/08 11:10 PM, "Dale" <hdinamic(at)qwest.net> wrote:
| Quote: |
I found a inspection cover missing above my oil cooler. I also found several
other Yaks had the same inspection cover missing when I looked at them. I was
getting a lot of smoke and exhaust into my cockpit causing head aches after
flying. It took me a long time to figured it out until I put in a smoke system
and could see it. I purchased a digital meter from Aircraft spruce after I
discovered the indicator on the business card gizmo does not work, and it was
new. I was getting large doses of bad stuff. After fitting a new inspection
plate and sealing around the front and rear of the oil cooler. there is a
large space between the scoop and the and the front of the cooler where it
also allows the exhaust to circumvent the cooler into the wing root into the
cockpit low pressure area. In cruise I now have a 0 reading on my meter and I
do get some gasses when running up with the window open and steep maneuvers
like high glide angles for landing. You will also find exhaust g!
asses coming up through the floor around the nose gear retract cylinder if
not properly sealed. I used two zip ties for that.
I would caution everyone to get rid of the old dot on a card and try a digital
meter. At least borrow one from someone and fly once with it.
Dale
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=196819#196819
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randmyak52(at)bellsouth.n
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| Posted: Wed Aug 06, 2008 6:56 am Post subject: OSH exhaust |
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The Instr. is the only way to have an accurate reading in the cockpit, have
owned one for a few years myself. I plug it into the outlet occasionally to
check for changes, such as recently reported by Steve Dawson. With cooler
weather not so far in the future we should all go heads up as we will be
doing run-up with the canopy at least partially closed. Not a good idea in
any YAK of any model. I have never had problem while in flight. Doesn't mean
that it cannot occur!!!!!!!!
Lefty
From: "David McGirt" <david(at)mcgirt.net>
To: <yak-list(at)matronics.com>
Sent: Wednesday, August 06, 2008 7:27 AM
Subject: Re: Re: OSH exhaust
| Quote: |
Which Yak are you flying Dale?
Great info!
David
On 8/5/08 11:10 PM, "Dale" <hdinamic(at)qwest.net> wrote:
>
>
> I found a inspection cover missing above my oil cooler. I also found
> several
> other Yaks had the same inspection cover missing when I looked at them. I
> was
> getting a lot of smoke and exhaust into my cockpit causing head aches
> after
> flying. It took me a long time to figured it out until I put in a smoke
> system
> and could see it. I purchased a digital meter from Aircraft spruce after
> I
> discovered the indicator on the business card gizmo does not work, and it
> was
> new. I was getting large doses of bad stuff. After fitting a new
> inspection
> plate and sealing around the front and rear of the oil cooler. there is
> a
> large space between the scoop and the and the front of the cooler where
> it
> also allows the exhaust to circumvent the cooler into the wing root into
> the
> cockpit low pressure area. In cruise I now have a 0 reading on my meter
> and I
> do get some gasses when running up with the window open and steep
> maneuvers
> like high glide angles for landing. You will also find exhaust g!
> asses coming up through the floor around the nose gear retract cylinder
> if
> not properly sealed. I used two zip ties for that.
>
> I would caution everyone to get rid of the old dot on a card and try a
> digital
> meter. At least borrow one from someone and fly once with it.
>
> Dale
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=196819#196819
>
>
--
Checked by AVG.
5:30 PM
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jorgen.nielsen(at)mweb.co
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| Posted: Wed Aug 06, 2008 10:41 am Post subject: OSH exhaust |
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Very good info, thanks for sharing it.
--
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schrick(at)pacbell.net
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| Posted: Wed Aug 06, 2008 10:55 am Post subject: OSH exhaust |
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Can you send pictures of what you have done? Are you talking about Yak 52 or Yak 50 or???????
It sounds like a great suject to learn from if we can get more details.
Mark Schrick
---
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