Questions About Props

[Wayne Galligan]

In using Dave Lockharts repitched three blade APC.
We go from a 17x12 std APC to the 15.75x10 or 11 3-b APC.
They originally start out as 15.75x13 3-B APC's

Wayne Galligan



-- Original Message ----- 
From: "Jerry Voth" <jjvoth at mtelco.net>
To: <discussion at nsrca.org>
Sent: Friday, August 26, 2005 10:29 AM
Subject: Re: Questions About Props


> 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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