Ceiling Bumps was Re: Word.

From: <joshuawfinn_at_gmail.com>
Date: Sun, 23 Dec 2012 22:24:15 -0000

Bob Bailey wrote:
>Sounds to me like longitudinal stability being marginal which allows
>tucking in due to speed build up in the dive. Much depends on
>component stiffnesses; the stiffer the model the less the stability
>required for quick enough recovery.
>
>Bob

Bob, I fly a pretty forward CG; Standard stab sizes, static CG is about 70% chord, more forward of that with the motor aboard. 3-4 degrees incidence. Still won't pull out when the prop is at a low enough pitch to use most of the available winds in a Cat I site.

Do you have any deflection data for tailbooms? I've thought that might be part of it, but I don't have the slightest idea what the stiffness should be on an F1D tailboom since no one publishes that data.

-Joshua Finn
Received on Sun Dec 23 2012 - 14:24:18 CET