Since we don't have many people on here that are comfortable
using Quick BASIC I will run Vance's prop program if you send
me some data on your prop.

What is needed is the cord width and angle of attack at
.9 .7 .5 and .3 times the blade max radius.

In other words if it is a 72 inch diameter prop the blade
max radius is 36 inches. .9 times 36 inches is 32.4 inches
out from the hub.

Usually the pitch given in inches is useless as not all props
are twisted properly. Especially of course the IVO variable 
twist prop. In that case send me the numbers for several different
twist settings.  
 
Paul Lamar
 
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