View Full Version : Washout in BOT wings
Mirage1
Aug 13, 2005, 03:36 PM
I picked up a like new BOT ARF with radio and was wondering if any washout is required.
It seems to be balanced 3 7/8 " back from LE. I weighed it at 58 oz. Any flying tips? Thanks, David
solo6796
Aug 13, 2005, 11:41 PM
They fly great. Use a Hi start. Anticipate turn response time and plan ahead. Don't land downwind. Drink plenty of water, and try to stay in the shade....
AJ
GBR2
Aug 13, 2005, 11:46 PM
Only grease it in for a landing, the fiberglass just behind the training edge is THIN and will crack no doubt after a couple less than perfect landings. It flies nice but they probably still haven't fixed the bad wing structure. Basic Chinese crap.
glidagida
Aug 13, 2005, 11:53 PM
Dear Mirage 1
I have been flying my original BOT for 15 years and most definitely you need washout. If not there will be some interesting behaviour on launch:eek:
Tip stalling with such a narrow tapering tip is always a possibility and I used to have to reset my washout every now and again when the covering stretched [it was Solatex fabric on an all balsa/spruce structure]. As the covering relaxed the tip stall would manifest itself with a moderate yaw on launch. The stall was controlled by a sharb dab of down which re-established airspeed.
I would set my inner panels with about 3mm and the outer at about 6mm.
Regards
GG
Stan Myers
Aug 14, 2005, 02:34 AM
Don't need it if built to plans. Tips go semi symmetrical when sanded as per instructions. Plane will generally stall straight w/o tips dropping other than slow downwind turns and almost anything will stall that way.
Stan
SoCalGliderFlyr
Aug 14, 2005, 02:38 PM
Dave's original hand drawn plans have the washout in the last six to eight inches.
mhodgson
Aug 16, 2005, 08:52 PM
Built mine from plan. Got it rediculously light (needed ballast to make it competition legal until I recovered it in something stronger and heavier) but never did put washout in.
Flew/flies great, slow flat turns, sharp steeper ones, stress free, hands off thermaling at its best.
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