Continental A-65 engine stall?

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

wrote:


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

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

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

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

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?

Dan

Aha! No, mine do not have anything inside them. The only thing that
deflects any air is the exhaust pipes...this might be something to
investigate

Scott

Scott wrote:
wrote:


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

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


Door spring wrapped around the pipe?

See Tony Bingles books...

cavelamb schreef:

See Tony Bingles books...

Confusing dear old Tony with dearer older Capt. James Bigglesworth?

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!