My heat Muff Installation

[akflyer 1427]

here are some shots of the heat muff I have installed on my plane.  Works damn good..

I have the scat hose just temporarily zip tied to the back of the radiator.  The hose runs down to the heat muff.  The ends of the heat muff are sealed with the rope gasket used around fireplace doors and the paste exhaust sealant.  It is just aluminum formed around the muffler with a 1/2" gap all the way around.  The outlet air runs to a firewall mount that I got off ebay for 9.00 for a J3 cub I think it was.  The air coming out is hot enough to make my right foot HOT when it is -5 F outside. 

[Av8r3400 1178]

So-- All of you heating comes off the Muffler?  Is that for convenience of installation (bigger component) or do you feel the muffler gives off more heat due to the baffling and restrictions in it?

Thanks for the photos.

[akflyer 1427]

just a larger heat sink area.  I figured if I need more heat, I would build a shroud just down stream of the Y pipe and pick up some of that heat.  They also have a paint that draws the heat out of the metal.  We tried it on snowmachines for the Irondog in 07.  We had the cans (muffler part) painted with it and the external tems went from about 450-500 to 750-800 on a wide open run.  It ended up putting too much heat in the cowling so we scrapped the idea.  I had thoughts of painting a stripe on where the heat muff goes to get some more heat out of it.

I think the biggest thing you can do is seal up the air leaks in the cabin area.  These are pretty leaky planes by nature but a little insulation and taping here and there and some good weather stripping and you can seal them up pretty dang good.  Takes alot less to heat a sealed up area.

[Av8r3400 1178]

Not everyone is willing to share a photograph their "hot muff" so thanks. 

What are you using for insulation in the cabin?  Do you use something flame retardant or what?  How much weight do you think you have with this insulation & (duct?) taping?

[akflyer 1427]

I am using the "low-e" insulation.  It is flame retardant and I may have added 1 pound.  It weighs next to nothing yet does wonders for keeping the cabin warm.

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