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On Jul 13, 3:33 pm, "Peter Dohm" wrote:
Aha! I read your post this morning and didn't think much about it at the time; but but it now occurs to me that the cooling air gains a lot of heat passing through the cooling fins of the engine--so that you may have created your own problem by sending cold outside air directly into the heat muff. Just a thought. Peter And since those Aeronca muffs tend to leak a lot, forcing air into them might cool the pipe too much just when the heat is needed. The OP needs to seal up those muffs. The connection to the baffling needs to stay, since a muffed pipe with no airflow (except when carb heat is on) will overheat and burn out. Piper had plenty of that sort of trouble on their Cherokees. The OP gets a 50 RPM drop in cruise, with carb heat. That ain't much. Dan |
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On Jul 13, 9:09 pm, Scott wrote:
Actually, my muffs fit fairly "airtight" around the exhaust pipes. I actually had to cut and trim a bit to make them fit at all, so I think the majority of the heat produced is captured inside the muff. However, I just don't think the two halves of aluminum have enough thermal mass to provide a ton of heat to the carb, so I think I still need to come up with a safe way to add mass inside the muff. Scott The Aeronca muff often involved a deflector plate, attached to a small strut across the pipe vee, that prevented the air from travelling straight across the chamber from the inlet to the outlet. The deflector made the air flow around the pipes to get from one side to the other. Lots more heat. Does your have that? Dan |
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![]() wrote The Aeronca muff often involved a deflector plate, attached to a small strut across the pipe vee, that prevented the air from travelling straight across the chamber from the inlet to the outlet. The deflector made the air flow around the pipes to get from one side to the other. Lots more heat. Does your have that? How about a diverter shaped to make the air corkscrew around the pipe? -- Jim in NC |
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cavelamb schreef:
See Tony Bingles books... Confusing dear old Tony with dearer older Capt. James Bigglesworth? |
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jan olieslagers wrote:
cavelamb schreef: See Tony Bingles books... Confusing dear old Tony with dearer older Capt. James Bigglesworth? Capt. James Bigglesworth? Never heard of him! |
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