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Old 04-21-2014, 12:29 PM   #3
pmdec
 
Join Date: Nov 2006
Location: France
Posts: 439
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Hi,

It could be made in Micarta (http://en.wikipedia.org/wiki/Micarta) or Permali (http://www.permali.com/) and not in "true" wood.
I have a variable pitch propeller with this kind of blades :



It is from 1938 and was made for a Dewoitine 520 and blades are Permali. The root blade is slightly conical. I searched for a picture of the blade root, but don't find one. Not even sure we have ever dismantled one from the hub.

Regards,
PM
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