The design program shows a static stability margin of 72% with the CG at 1/8" behind the wing. You shouldn't have to change the CG but feel free to do whatever it takes.
My personal model has only one flight on it due to factors beyond my control. That flight was outside at night and was around 2 minutes on an 800 turn wind. If I ever get to fly again (actually should happen on November 18) I'll report on the results. I have a wood wing on mine now but will try both wings if I have the time.
----- Original Message -----
From: Neil Dennis
To: Indoor_Construction_at_yahoogroups.com
Sent: Friday, November 03, 2006 8:32 AM
Subject: [Indoor_Construction] SO models
Wonder, has anyone successfully flown the "little square" model ? My
group is having a problem with "tail standing", the one I built also did
that. So, what I'm wondering, the stab seems to be too small to be a
true lifting stab so the CG can be behind the wing, it doesn't seem to
have enough "control". The boys are not happy when the DD Mark IV's we
have putt around happily in the windy gym while the LS's fall on their
tails and usually break.
Anyhow, I'm going to build another model with the same wing and stab
sizes but with the CG at about 50% of chord and see what happens.
Any thoughts, I think the tail volume is much smaller than the usual
indoor model that has the CG well behind the wing.
wombat
[Non-text portions of this message have been removed]
Received on Fri Nov 03 2006 - 06:06:04 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:44 CET