Archie wrote:

Just another trade-off guys.
Helical gears = Quiet, Thrust effect, and limited strength.
Spur gears= Noisy, No thrust, and high strength.
Somewhere there is a median compromise per hp.
Archie

I am not sure I agree on the strength issue Archie.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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