Perry Mick wrote:

Paul wrote:

As Perry's design stands now I suspect the engine will bog,
possible as low as 5000 RPM. This means it will be short
of its design goal of 6000 RPM and 180 HP. This will be
caused by using the thick Clark Y wood airfoil I suspect.

I think a thinner supersonic airfoil is indicated and may allow
the engine to rev higher hence generate more HP. I also think
it can be done with carbon fiber.

You're right on that account, my prop analysis program (from the
Hollman book) shows that.  Just changing the thickness of the
blades has a significant effect, the thinner the better.

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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