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Old Dec 06, 2012, 09:00 PM
markschaffin is offline
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United States, KS, Andover
Joined Oct 2005
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Originally Posted by CFBird View Post
I'm designing and building a Large swing-wing 1/5 scale aircraft and I'm trying to figure out what size actuators or servos to use. The question I have is...what type of forces are affecting the movement of the wing....meaning if I had a 30lb actuator pushing the wing forward while the aircraft is moving at 120mph will this be enough to move the wing? Or will there be additional force on the wing which would translate into more weight for the actuator to push? If I'm not being clear please let me know.
Thrust = drag, so you should be able to get some rough idea what proportion of the drag is due to the wing. How much thrust do you get from your propulsion system. From there, approximate the center of drag for each wing and calculate the moment you need to counter with your actuator. These are all approximations. Or, you could go the other way. Given the span of your wing, what would be the drag required to reach the limit of your actuator. Does this drag make sense?

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