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Thread: PA-22 Chin scoop baffle seal

  1. #31
    Glen Geller's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    Here's is how our five PA22s are set up:
    Pilot side inboard lower muffler out to upper cabin heat box (the very worst thing to install on a Pacer.
    Pax side lower muffler to lower cabin heat box.
    Exhaust header bottom muff to carb heat box.
    Right outboard upper baffle to top of header muff; Right inboard upper baffle to muffler shroud upper (nearest rt mag & vac pump.)
    Sugar scoop to pilot side outboard lower muffler. 20200518_160244.jpeg20200518_160153.jpeg20200518_160141.jpeg20200518_160058.jpeg20200518_160016.jpeg

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    Glen Geller
    1955 PA22-150 "One For Papa!"

  2. #32
    Glen Geller's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    Here's the lower air dam with silicone baffle material sandwiched between original part and my doubler, and a bunch of pop rivets.
    And the carb air inlet scoop.
    MY APOLOGIES, upon close inspection I did sandwich the scoop between the Brackett housing and airbox flange. And I think I had to assemble them on the bench and then reattach the whole mess to the bottom of the carb.
    It's almost like installing and certifying a nose wheel was a parade of "Oh crap, how do we make that fit?" and "Oh crap, the CAA says we gotta add this thing."
    1589843750852.jpeg1589843878049.jpeg

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    Last edited by Glen Geller; 05-18-2020 at 06:24 PM.
    Glen Geller
    1955 PA22-150 "One For Papa!"

  3. #33
    walt.buskey's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    Yes, Yes, YES!! I can now see that there HAS to be a hole --where the stub USED to be-- on the far left edge of my muffler shroud, right where that $#$%!# patch is. Mystery solved... for now. Have no idea why that was eliminated, but it'll be coming back real soon! Then I can hook up a scat tube from there to that 2" elbow in the chin scoop.... and.. maybe, THEN I can gat some heat!

    Thank you ALL for your help! I will post progress later; right now I'm still trying to finish up the baffle seals.

    Here's what my final iteration looks like for the chin scoop baffle; tested one side and it seemed to fit well, so I duplicated that for the other side. The straight piece across the front I had already tested -- OK on that one, too.

    DSC08539.jpg DSC08540.jpg DSC08541.jpg DSC08542.jpg

  4. #34
    Glen Geller's Avatar
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    Wink Re: PA-22 Chin scoop baffle seal

    [QUOTE=walt.buskey;124457]
    Here's what my final iteration looks like for the chin scoop baffle; tested one side and it seemed to fit well, so I duplicated that for the other side. The straight piece across the front I had already tested -- OK on that one, too.


    That lower air dam looks good, Walt!

    On my muffler shroud, the duct that is missing on yours was about 50% fallen off when I bought my plane. My IA at the time replaced the loose original rivets with steel cherrymax rivets and it's been good for 15 years. It was tricky to do it in place but not impossible if you have a short/90 deg drill to get the rivets out. Then split the shroud and retrieve the bits from inside with a grabber, vacuum or magnet.

    Not sure where you are going to find that scat adaptor to install in place of patch - maybe someone has an old shroud and can do you a solid, or Atlee-Dodge or other aircraft exhaust company can help.

    GG
    Glen Geller
    1955 PA22-150 "One For Papa!"

  5. #35
    andya's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    seems like ACS might have something in that category, just a question of it will be the right size.
    Also might not be curved enough to fit the shroud but worth a look.
    "Progress is our most important problem"

  6. #36
    walt.buskey's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    57A's on the back burner for a few days while I get some house stuff done, but I did notice that on my muffler shroud all the scat tube stubs are steel (rusty), mounted to a curved steel plate (also showing surface rust), and riveted onto the shroud. I should think it would be easy enough to fabricate a stub for that position where mine is missing.

    I see where Univair does sell the shroud, but I'd rather not give them $635 for it if I can avoid that.... (Looks like the scat tube adapters that ACS has are all aluminum and mounted to flat plates.)

  7. #37
    walt.buskey's Avatar
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    Default Re: PA-22 Chin scoop baffle seal

    For those who might be interested -- I just received my $200 brandy-new Univair special... air scoop. Here are some decent pics of the offending -- I mean missing-- part:

    DSC08546.jpg DSC08543.jpgDSC08545.jpg

    Andy, I'll take this down to the plane and fiddle with it to see how it fits; if it looks good and yours is the same (?) I'll PM you -- if yours is still available.

    Now, back to the springtime house chores!

    Walt

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