Luscombe exhaust cabin heat

[Geraldo]

I have a 41 bc12-85 with luscombe exhaust with little to no cabin heat in the winter, does anyone have any suggestions
Thank you

[PA1195]

Re: Luscombe exhaust cabin heat

Hello from Fairbanks AK home of cold. I'm not an A&P just a fellow aircraft owner. Here's some questions and suggestions.

Is this your exhaust or similar? http://dc65stc.blogspot.com/2010/09/...onversion.html

There appears to be two heat muffs. I don't know but are both providing heat or is one for the carb and "only" one for the cabin?

Heat comes from adequate outside airflow of ambient temp air ducted over an adequate large heated surface area. That's in turn fed into a tight leak-free space that's as small as possible. No mystery, eh?

Working with your mechanic figure out a way to maximize the heat coming from your exhaust. Run the engine at 75% rated power. Make sure the heat muffs don't leak hot air. Draw as much heat from "them" as possible consistent with adequate carb heat when it's needed. Insulate hot air ducting to the cabin. Seal the cockpit to exclude cold and retain heat. Put a curtain behind the seat to minimize the heated area and exclude the rest of the fuselage and floor.

I've seen installations where annealed small diameter door pull coil springs are wrapped around the exhaust under the heat muffs to pick up more heat. I've seen where one heat muff feeds the second pre-heated air to increase the heat output of the second to the cockpit. Discuss these and any changes to your current heat system or plane with your mechanic.

Or install a C-150 exhaust system and merge the heat output from both muffs. There are copies of field approvals for them available.

Gary

[astjp2]

Re: Luscombe exhaust cabin heat

Hanolin Wilson mufflers, the luscombe exhaust is not for winters...There is a 337 posted in the tech ref. section on this.