[NSRCA-discussion] trimming question

[Bob Pastorello]

There is no reason on earth to try to balance an airplane for identical 
elevator trim handling inverted or upright, unless new laws of Physics and 
aerodynamics can be drummed up.

EVERY airplane that "requires NO elevator when inverted" is nearly ALWAYS 
making some other trim compromise, usually has some bizarre wing and stab 
incidence, thrust offsets, and carries elevator trim.
    Then all of THOSE things require mixes out the butt....

I once was challenged to "watch his airplane when he wiggles the sticks 
pre-engine start".....and this was an airplane that belonged to someone we 
would all be SHOCKED to hear about...Sure enough, when he wiggled those 
sticks around, it was unbelievable.  NO control input was "pure".

His airplane flew hands-off inverted.

EVERYWHERE else in his sequence, he was driving those sticks and flippin' 
switches like you wouldn't believe.

Just something to think about.... and go here 
http://www.rcaerobats.net/trim_chart.htm

Bob Pastorello
www.rcaerobats.net
rcaerobob at cox.net
----- Original Message ----- 
From: "Anthony Romano" <anthonyr105 at hotmail.com>
To: <nsrca-discussion at lists.nsrca.org>
Sent: Friday, May 19, 2006 9:00 AM
Subject: [NSRCA-discussion] trimming question


> For checking CG I had relied on rolling inverted from level flight and
> checking for how much forward stick was needed. I have also seen this done
> on a 45. Wouldn't this bias toward tail heavy? What is the advantage of
> either?
>
> Anthony
>
>
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