Re: Yak-52 Exhaust Danger


Subject:    Re: Yak-52 Exhaust Danger
From:    doug sapp (dougsappllc@gmail.com)
Date:    Sat Aug 23 - 5:22 PM
Steve,
I do believe I have this Yak 52 cabin heat section in my stock, give me a
call on Monday.

Also,  Not saying that it has not been getting done, and not looking to piss
anyone off, but it is nearly a law written in stone that the shrouds come
off of all cabin heat muffs at every annual, just to prevent what you are
describing.


On Sat, Aug 23, 2008 at 3:42 PM, Mozam <sdalton@hughes.net> wrote:

>
> I finally got around to taking a picture to show what all -52 drivers need
> to be aware of.
>
> The inner pipe of the exhaust section which contains the baffling and
> shroud for the cockpit heat split open.  You cannot see this split because
> it is hidden inside the heat shroud.  If you remove this section and inspect
> the inside of the inner pipe you may see any splits.
>
> When this pipe fails you are getting CO pumped directly into the cockpit
> via the cockpit air vent system.  And you have no way of knowing this is
> happening.  I have no idea how long this pipe had been split and I was
> getting so much CO.  The split in my pipe grew until I finally realized
> something was amiss when the air from the vent between my knees was so hot
> it was burning my legs.  Raw HOT exhaust was being pumped straight into the
> cockpit.
>
> In the pictures you can see what this section looks like with the heat
> shroud cut off.  You can see the small sections of U-channel that hold the
> shroud away from the inner pipe.  They are spot welded on and many of the
> spot welds have failed, leaving more holes in the pipe.  You can even see a
> new hole I found when I took the picture.  You cannot see the BIG patch on
> the back side of the pipe.
>
> I STRONGLY recommend that you remove this section of exhaust and inspect
> the inner pipe for any leaks.
>
> You can see in the picture the new air supply hose I rigged up...works
> great, but no heat now.
>
> Does anyone have just this section of the exhaust available?
>
> Fly Safe,
> Steve Dalton
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0150#200150
>
>
> Attachments:
>
> http://forums.matronics.com//files/exhaust1_581.jpg
>
>


-- 
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644




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