stunthanger.com
Design => Stunt design => Topic started by: GWH on January 09, 2007, 09:17:40 PM
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Hey Guys,
I am thinking about:
Moving my "flaps" outboard to the wingtip area. This position would be the "standard" aileron area of a rc/normal aircraft.
There is no real reason for it. But to make something different per se.
My questions:
Would this cause rolls? ( Thinking the extended linkage: would torque: causing possible rolls)
What about wingtip/outboard area turbulance?
Thanks
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My concern would be more about tip stalls, since the airflow tends to "spill" over the tips causeing vortexs at the tip, the higher angle of attack created by the flaps on the outboard sections IMHO would greatly increase the induced drag when manuevering. This would be counter to my desires.
Mark
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I think tip stalls would be a major problem. There is an OTS legal British airplane called the Meteor which has outboard flaps.
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That sounds interesting. You might need a little more elevator because of the reduced downwash from the wing, but you might need less elevator because of reduced flap effectiveness. You could use torque tubes like arrow shafts to reduce the springiness. Let us know how it turns out.
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Interesting concept. My thoughts on flaps is that for C/L their real purpose is to create additional lift when needed (hard corners). Ailerons are typically used for roll control and even though they increase lift at the wingtips they are not design to increase total lift . I would expect the lift increase to be much greater with full span flaps and also this configuration keeps the center of lift closer to the CG. It might be kind of tricky balancing the lifting moments given the lift/velocity gradient across the wingspan.