Re: Good starting Penny plane prop pitch?

From: Jake Palmer <82.jake_at_gmail.com>
Date: Wed, 14 Dec 2011 10:21:31 -0800

Mike,

12x24 is a pretty common prop for LPP. In a building that size you should
look at prop designs that will flare. You want most of the blade area
forward of the spar. Even with a flaring prop you'll be bouncing on the
ceiling unless you back off a lot of turns.

If you're planning to fly F1D in a small site without a VP prop I would
recommend using partial motors. Bouncing an F1D off the ceiling won't
usually end well. Something in the neighborhood of 18x34 would be a good
place to start.

Jake

On Wed, Dec 14, 2011 at 5:45 AM, mkirda_at_sbcglobal.net
<mkirda_at_sbcglobal.net>wrote:

> **
>
>
> So I am starting with a Cesar Banks Novice Penny plane.
>
> I will initially be flying only in 20-40 feet range, so I am looking for
> recommendations for prop pitches.
>
> If I use the Propeller forming block Excel workbook, I enter in 12 inch
> diameter, 2" block thickness. Not sure what I should look at for desired
> P/D ratio. Maybe 2.0 or 2.2?
> Will be using some leftover pink foam, so I could do more than one rather
> easily - Just not sure what I should try first.
>
> I should probably already ask about F1D for the same flying spaces too,
> with simple non-VP props...
>
> Thanks in advance!
>
> Regards.
> Mike Kirda
>
>
>
Received on Wed Dec 14 2011 - 10:21:34 CET