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Old 12-04-2009 | 02:12 PM
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ram3500-RCU
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From: n. canton, OH
Default RE: Too much right thrust? Waco

ORIGINAL: skillet92

Guys I have a hangar 9 Corsair with G-20 Gasser and the parkzone corsair. I can tell ya that my electric has a lot more Right thrust built in than my Gasser. Why I do not have a clue. Both fly great. And both require precise ground handling while taking off because of the torque.
I have been flying RC for over 40 years now and enjoy nearly all aircraft types of the hobby including the exploding electric type. I have a couple observations to offer on this subject. Our larger and heavier nitro and gas ships have greater mass vs. torque, having heavier wings. They are also generally using slower turning props than any electric direct drive motor (the older gear reduced and slower turning props did not have as much right thrust built in). The light weight (usually foam of some type) electric planes are more easily effected by the torque that an electric motor can exert on it. Most of the weight in them is concentrated very near the mean thrust line (center of the plane). A greater thrust angle helps to overcome all this on these light airframes. Heavier more conventionally built planes powered with larger electric motors, turning typical giant scale props, do not seem to need as much right thrust (more what we would call typical in the 3deg range). I am experimenting with adding weight to the right wing tip on planes (as explained in a recent RC journal) and in does reduce the need for this right thrust (and even reduces the deflection of right rudder on take off), and almost eliminates the effect of torque. Very interesting. For all these years, I went to great lengths to laterally balance my planes, and I should have been making them slightly heavy on the right wing tip. The learning continues.