> Here is an interesting idea.
 > the spring keeps the heat shield spaced out
 > from the tangential muffler and allows air to
 > flow through for cooling.
 >
 > Paul Lamar

 > The exhaust seems to be aimed at the rubber bushing motor mount. Even

with

 > some cooling air, this could be hot enough to catch it on fire, or melt

it,

 > especially during taxiing. He may be able to construct a small stainless
 > shield completely over the mount to protect it, but you'll need to check
it
 > during taxi testing. My exhaust manifold was about 4" away from the

mount,

 > and I had to construct a shield. It worked fine.

I don't interpret the photo that way, It looks like the exhaust must go out
the OTHER end of the tangential muffler.  Air come in this end that is shown
to flow over the muffler.  If you are talking about radiant heat transfer to
the motor mount, then I agree with the statement, probably need a heat shield.

Bill Schertz
KIS Cruiser #4045

This is the back of the muffler. The exhaust goes straight down and exits
the side of the cowl. Not in the middle. IMHO the pipe dia. is on the small side.

The springs will act as fins and some of the heat in the springs will be
carried off hopefully by the air flow between the muffler and the heat shield.
The cowl opening in front of the muffler is still there. Not the lowest
cooling drag arrangement in the world but this is a 130 MPH bush plane.

Paul Lamar


The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

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