Using car exhaust for engine Pre- heat??

nrp wrote:
On Jan 14, 11:22 pm, Clark wrote:
wrote in news:0aed474f-8115-4575-84e4-18b6c58bb1b3
@n10g2000vbl.googlegroups.com:



Greetings:
It's winter here in Tennessee a question for the group: If I took a
flexible Aluminim duct,/ hose hooked it up to my car exhaust pipe,
then put the other end in the lower end of the engine cowling to pre-
heat the aircraft's engine would this cause any problems?
I would drill a small hole in the cars exhaust pipe to allow for
exhaust water to escape
Today's cars are very clean burning with almost zero emissions or so
they say? I would not direct the exhaust at the airframe or the
engine just enough to enter the cowling at the nose strut. I would
open the oil door to allow a flow of exhaust. I would leave the cabin
door open on the aircraft to make sure no CO2 besides, my aircraft
has a CO2 detector installed.
Carbonic acid isn't the problem but the nitrogen oxides and sulfur
oxides combine with the water of combustion to make nitric and
sulfuric acids!

I assume that you do not have electricity at your aircraft otherwise a
Tanis, etc preheater installed would be much better, or a modified
ceramic heater with ducting. I have a Tanis that heats the oil and all
four cylinders.

--

Regards, Ross
C-172F 180HP
KSWI

Clark writes:


Big time corrosion potential with all that water vapor and CO2. Carbonic acid
is a problem with any combustion gas...

Note that mufflers rust out. There's a reason why, and the exhaust gas is it.

On a home furnace, you use a clay or PVC flue.

[It's less of an issue when the muffler/flue gets HOT and stays hot. It's the
cooler ones where the gases condense that get you..]


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