Your article is loads better than the current one on prop effective pitch.
Vance

I just read that Effective Pitch article in EAA Sport Av and it is not 
all that bad of an idea. Course it is a bit redundant with just specifying 
the top speed achieved with a given prop.

It would be better if the prop building guys used a cord pitch instead
of the bottom of the blade. Also a speed specification for optimum twist.

If that seems impractical then specify the angle of the blade every
0.1 blade radii. Too many props out there with the wrong twist, improperly
twisted or no twist at all.
 
Perhaps the EAA could apply some pressure for standardization.

Why don't you write an article on props Vance? Send it to me first and
I will critique it :-)

Paul Lamar 

The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org