Re: F1D longitudinal trim

From: Tapio Linkosalo <tapio.linkosalo_at_helsinki.fi>
Date: Sun, 12 Nov 2006 10:09:33 +0200 (EET)

On Sun, 5 Nov 2006 RLBailey_at_care4free.net wrote:

: CG is much too far back; suggest you move CG forward by up to 10 mm and
: retry. You need to eliminate the deep stall first.

Bob, you hit the nail right to the head. I moved wing 10mm back, and now
the stall behaviour is much better. The model is still rather sensitive to
decalage, but now there is a window between stall and dive.

Nick wrote:

: If the Fuse is floppy, It will come back to haunt you, It took Fred
: Tellier point that out with my model for me to see that.

I also added some boron to the fuselage, and I think this made the
behaviour of the model more consistent. I managed to ged some
decent-looking flights yesterday. Not much duration, as it seems obvious
that my rubber is too thin, after some climb on the burst I start to loose
altitude on cruise. But the model is seriously overweight, as well as the
motor tube is battered, so I think I better build a new model rather that
use thicker rubber and witness the tube collapse under load. In any case
this first attempt gave me some nice data on model layout and trimming,
that I can use when building new models.


-Tapio-
Received on Sun Nov 12 2006 - 00:15:51 CET