Hi,

The weather being what it is, and suffering
from pneumonia, I've no choice but to stay
at home and at the most play with FMS, this
excellent free and powerful flight simulator.

By altering the PAR files one can change the
behavior of your model - to get a flimsy
slowflyer to roar across the sky at 200 mph,
or vice versa, but the more interesting
is to try to improve your model's flying
characteristics, by playing with aspect ratio,
chord, stabilisator size, and not least CG.

By moving the CG backward one can use smaller
stabilisator, but then if flying too slow you
run out of stabilisator and elevator, leading to
the famous high-speed tuck! Sometimes you can roll
inverted to safety, but not always!

The one thing that doesn't work as in real life
is stall, though. For if your model goes into
a stall-like spiral dive (usually happens when
you have too small a stabilisator combined
with rearward CG) you have to give pro-rudder
to get out of it, not counter rudder - which is
a wee bit weird.

Can anyone explain why?

Tord
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