Neil A. Kruiswyk wrote:

Martin Orro wrote:

Paul,

        Is'nt circumference = pi x diameter?  Therefore:

        ((dia X 3.14 / 12) X RPM X 60) / 5280 = MPH

                        Martin

You are absolutely right. I don't know what I was thinking about :-)

Paul Lamar

For reference,

Mach 1 = 803820 inches per min = 761 miles per hour.

Here's an interesting web site.  http://simscience.org/fluid/red/af.html

Neil

 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

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