"Castle, Ron" wrote:

Paul, I just looked over the cozy motor mount setup. You have the exhaust
running thro the wings. The spar in the back is where the wing attachments
are. it runs up to the fuselage.

Yes the exhaust pipes are behind the spar and they go that far out
to reduce the hot exhaust impinging on the prop. With a non integer
gear reduction such as most psru's available it is not possible
to sync the prop to exhaust pulses. That burns the prop. So that is 
the reason why the pipes are shown like that. Flex pipes could be used and a 
tangential muffler could be used out there. That would keep the nice long
tuned pipes and cut the noise.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org