Indoor Props - Pitch versus Ceiling Height

From: Peter L. Hess <hesspl_at_comcast.net>
Date: Sun, 15 Apr 2007 23:45:56 -0000

In general, is there any relationship between the useful or effective
pitch of, say, an LPP prop and the height of the ceiling in the flying
venue?
For example, if I am flying in a venue with a 25' ceiling, would I want
to use a lower or a higher pitch prop than if I were flying in a 50'
high venue?
The question is prompted by an experience I had today flying an LPP in
a gym with a 34' ceiling (well, rafters, etc., at 34'). I tried a new
12" prop with 24.5" pitch on a well used airframe. The prop seemed
very powerful and efficient judging from the way it hauled the plane
around while turning at very low rpm. However, it was very difficult
to control, i.e., to find an suitable rubber size/launch torque
combination. Using props with pitch of about 20" never gave me so many
fits.
Your thoughts, comments, and/or suggestions would be appreciated.
Received on Sun Apr 15 2007 - 16:46:51 CEST