Fuselage length, CG and decalage?

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Wed, 01 Apr 2009 09:30:17 +0300

I'm returning back to the question of the huge decalage (oveer 6
degrees) that I have in my current F1D. Looks like part of the problem
is the tailplane, that is too flexible, and washes in in the flight,
thus reducing the decalage. Therefore the static 6 degrees may not be
the whole truth. But another thing that came to my mind, when seeing the
drawing of the model of Leif Englund, was the fuselage length. Leif uses
a model with overall fuz length of 800mm (with 50mm of nose), while my
model, built along Big Square drawings, has overall lenght of 910mm.
Longer moment arm of the tail means that it needs to lift less, thus
reduce it's angle of attack? Maybe shortening the fuselage would improve
the model? Definately it would make the fuselage lighter and stiffer...



-Tapio-
Received on Tue Mar 31 2009 - 23:30:24 CEST