"Kent, Russell" wrote:

Paul Lamar wrote:

Why not one straight piece guys. A lot less work.

I had the same question in my mind.  We must be drinking the same
stuff
again. :-)

I think you'll want the exit end to be square cut.  As you have drawn
it
now (beveled), I think there is the potential to have the airflow
cause
unwanted backpressure.

Russell Kent

On some planes it won't work because of motor mount conflicts. Also, if
the exhaust pipe is placed  on the center line of the muffler,  it does
not leave room for the rad/oil cooler combo. If the radiator/oil cooler
combo is  under the engine then the exhaust pipe must be angled away
from it as I have done on my installation.    There is no alternative!
In Bob's case he is  using cheek radiators so in that particular
instance, perhaps,  straight pipe could be used.  From my point of view
as a builder, the straight pipe offers no advantages.  I can plasma cut
a curve just as easily as a straight line.     As far as the exit end
is concerned. it can be angled with the air stream  or shaped as
desired.  Jerry

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