I would find out what they are packed with Don before you buy one.
The 13B is good at digesting muffler internals and blowing them out the
exhaust pipe.

David Doshay wrote:

Warning: Soap box mode ON:

And tossing muffler parts has been a very big safety issue. I sure wish
folks would stop trying to do mufflers on the cheap. It is going to hurt
some people and make it impossible for the rest of us to get any
insurance at all.

Anybody remember the Discovery? Mazda powered pusher. Muffler
came apart in flight and went through the prop. Fire at landing burned
the developer/pilot over 80% of his body. He lived, but this event sure
changed his life. 6 months in the hospital, and he is no longer able to
fly a plane. Big hopes and plans turned to shattered dreams pretty fast.

Please use inconel.

OK, I tried, and now I feel a little better.

David

Bill Freeman wrote:

Pushers are ESPECIALLY critical for exhaust integrity.  Several canard
pushers weld a tab onto the rear portion of the exhaust and add a stainless
cable to retain the exh if it fails.  Not a bad idea.   Tractors are
much more forgiving, altho the white-hot gasses exiting in the wrong place
can be pretty "exciting".   Think thru the whole exhaust system very
carefully and use extensive heat shielding of nearby components to
protect from radiated heat.   There is more than you probably think.

Bill

 
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