Ramon Collado. wrote:

Hi Paul.....    I scaled the propeller dwng you have on the web and it came
out that the width at the center of one blade is about 4.700
inches......and 35" long.........Does that sound right to you?????

Ramon

Will that fit your airplane landing gear? 
Check the mach number of the tips at 6300 engine RPM 
for the 2.17:1 PSRU drive ratio or 2900 prop RPM. 
A 70 inch prop dia. sounds a little large. 
Mach .8 is about right. It gets real noisey
much above that. A 3:1 PSRU is another story. 

BTW Have you found those Torlon balls yet? 
I have some engineering data on Torlon somewhere around
here if you are interested. Also check the Torlon ball race 
diameter so there is just a little clearance for the number of balls
you are using. I wrote a short QB program to figure that out awhile
ago.

Are you making anything yet? don't forget to take pictures.
 
Paul Lamar
 
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