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Optional rear heat muff
Anybody have one of these kicking around that's in better shape than mine? I've tried to reinforce the muffler end. Will have to try again --not happy with the result yet-- but thought I'd ask here. This is apparently for those PA22s that had the optional rear heat (with two heat boxes on the firewall). Looks like Univair part #U10843-003 and #U10764-003... (Must be made of solid gold!!)
Thanks -- WaltDSC07980.jpgDSC07981.jpg
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Administrator
Re: Optional rear heat muff
That is actually used for the carb heat and the two chambers around the muffler can are used for the front and rear seat heat.
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Re: Optional rear heat muff
Ours is in pretty rough shape as well. However, based on the pricing from univair, I think repairing it makes a lot more sense. Univair is pretty proud of all of the exhaust parts for the pacer on that page.
I'm certainly not a sheet metal person so I'm not qualified to say anything. However, sure seems like this could be made for a lot less than that univair price. Not saying it would be easy but...
Sent from my SM-T350 using ShortWingPipers.Org mobile app
Last edited by smcnutt; 09-05-2019 at 06:52 AM.
“Seek advice but use your own common sense.”
― Yiddish Proverb
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Re: Optional rear heat muff
Acorn welding up here in Edmonton,AB makes new ones
http://www.acornwelding.com/products..._Tri-Pacer.pdf
with the rather favorable exchange rate ( about 30%)to CDN dollars in your favor it might be worth taking a look
they do quality work
shane-o
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Re: Optional rear heat muff
Curious how their pricing compares....but not curious enough to call. Post if you find out.
“Seek advice but use your own common sense.”
― Yiddish Proverb
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Re: Optional rear heat muff
Mine was a mess when I got this plane, looked like a pile of patches and was cracking through all over the place. I hemmed and hawed but then finally got the solid gold ones from Univair because I was sort of expecting if I got a used assembly it might be as messed up as my own.
Where feasible, I try to buy new parts just to refresh things, but it does get expensive.
I will pass on that if you do get a new one, you will need to drill and fit it. The holes are not pre-drilled.
As Steve said, the rear seat heat comes off the Muffler, the shroud you have pictured is for carb heat.
If you assemble the airplane without the shroud, the rear seat heat connection can be routed to the carb heat, which my IA allowed me to do for a year while I thought about how to replace my messed up one.
Last edited by Troy Hamon; 09-05-2019 at 02:34 PM.
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Re: Optional rear heat muff
Thanks for the link, gliderman; just sent them an email. I'll post with their response.
Troy, hello! Yes, I'm of the same mind: if I can afford it, usually better to go new... I'll try once again to reinforce the crack-riddled muffler end of the muffs (looks like the small ends were already reinforced), but I'll keep my options open.
Here's a better view of the tender end of the upper half; the lower is worse, with all those stress cracks, all of which have now been drilled. Pretty ugly. Also some evidence of previous welds/repairs to these pieces, a recurring theme here.
DSC07992.jpg
Thanks for all the responses!
Walt
Last edited by walt.buskey; 09-05-2019 at 06:26 PM.
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Administrator
Re: Optional rear heat muff
Originally Posted by
walt.buskey
Thanks for the link, gliderman; just sent them an email. I'll post with their response.
Troy, hello! Yes, I'm of the same mind: if I can afford it, usually better to go new... I'll try once again to reinforce the crack-riddled muffler end of the muffs (looks like the small ends were already reinforced), but I'll keep my options open.
Here's a better view of the tender end of the upper half; the lower is worse, with all those stress cracks, all of which have now been drilled. Pretty ugly. Also some evidence of previous welds/repairs to these pieces, a recurring theme here.
DSC07992.jpg
Thanks for all the responses!
Walt
Walt, I would roll a doubler and rivet it over those cracks.
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Re: Optional rear heat muff
That's what I've done, Steve, I just didn't like the way it came out so I'll do it over. Turns out my pieces have a bit of taper to them, so it's not just a straight roll. I'll see what I can do. I'm sure I can make an improvement in each of those pieces. (Back to the drawing board!)
Walt
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Administrator
Re: Optional rear heat muff
If you are like me it only takes 3 times to get it like you like it.
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