Questions About Props

[Jerry Voth]

Master Airscrew's suggestion is to decrease the diameter 1" and increase the 
pitch 1" when changing from a 2 blade to a 3 blade

Jerry
----- Original Message ----- 
From: "Dieter Rozek" <rozekd at earthlink.net>
To: <discussion at nsrca.org>
Sent: Thursday, August 25, 2005 11:57 PM
Subject: Questions About Props


> I'm sure that this has been covered before but how does one go about 
> figuring out which 3 bladed prop size to use in place of a 2 blade.  I'm 
> assuming the the diameter would be smaller but by how much and I'm 
> guessing pitch affects the size as well.
>
> Also, this is somewhat related but not an aerobatic question per say.  If 
> an aircraft has a pusher prop configuration and is powered with an 
> electric motor isn't it possible to use a regular prop and just mount it 
> in the same orientation as it would be used in a tractor configuration but 
> just reverse the direction of the engine.  Isn't it also possible to 
> reverse the direction of a gas engine as well.  If this is the case why do 
> they sell "pusher props", is this so that you don't have to reverse the 
> direction of the engine.  Thanks for any help with this.
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