Re: F1D longitudinal stability

From: Tapio Linkosalo <tapio.linkosalo_at_helsinki.fi>
Date: Sat, 10 Nov 2007 09:45:26 +0200 (EET)

On Tue, 6 Nov 2007 RLBailey_at_care4free.net wrote:

> I believe that moving the CG forward is the only cure for this problem,
> particularly if the model stalls during cruise in bad air and not just
> at getaway. I recommend 5 - 10 mm forward. A larger tail will be heavier
> and the CG will go back, negating the benefit thereof.

On Tue, 6 Nov 2007, Bill Gowen wrote:

> I don't want to give advice about F1D's because I don't fly F1D but in
> general a short heavy motor can be accommodated by using a wire spacer
> at one or both ends of the motor to ease the strain on the motor stick.

Bob, thanks. I think I could get away with buiding a larger stab, as the
first one is a bit too hefty, and I could get away with lighter
structures. But anyway, as moving the CG forward is a better way, thanks
Bill for reminding about the spacers. That is the easiest way, as the
motor is short and heavy anyway, just bend a spacer a few centimeters long
to move the motor and thus CG forward. I'll try that the next time I get a
chance to test my F1D.


-Tapio-
Received on Fri Nov 09 2007 - 23:45:30 CET