my second problem is regarding servo movement.i want to know whether is there is any way to find out required amount of servo movement to attain a speciic amount of turn in air at approx constant air speed and height?
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@ Shailendra ,
Simple Answer is "NO" , like Greg said is trial and error or by lot of mathematical calculation & is almost impossible to give in simple formula or yes/no. There many variables for any given configuration for the approach you are taking. For eg. The length of servo horns , the distance of pivot point at which the push rod is connected. width of control surface( rudder/elevator/aileron, combination etc changes the turn radius. It is not same as how much would you need to turn your steering wheel to get a particular turn radius in your car, each plane would turn with different radius and again differently if cross wind is involved. You have to remember that planes and boats do not turn the same way as car or land vehicle. In any case if you are trying to standardize turn radius for a plane against given amount of servo turn/movement etc seems to wrong way to approach as it will be different almost every time , even different for different servos !!, So read , read more, use your imagination to find practical solution that you can try.
The answer is no. Or yes ,there is a way, by trying it out. every airframe is different. Or go to school and learn Aeronautical Engineering. Really there are to many variables involved in your question. Study other aircraft and use your intuition and imagination and it will come to you. Or just use +- 30 deg for an average plane. ;)
Replies
Simple Answer is "NO" , like Greg said is trial and error or by lot of mathematical calculation & is almost impossible to give in simple formula or yes/no. There many variables for any given configuration for the approach you are taking. For eg. The length of servo horns , the distance of pivot point at which the push rod is connected. width of control surface( rudder/elevator/aileron, combination etc changes the turn radius. It is not same as how much would you need to turn your steering wheel to get a particular turn radius in your car, each plane would turn with different radius and again differently if cross wind is involved. You have to remember that planes and boats do not turn the same way as car or land vehicle. In any case if you are trying to standardize turn radius for a plane against given amount of servo turn/movement etc seems to wrong way to approach as it will be different almost every time , even different for different servos !!, So read , read more, use your imagination to find practical solution that you can try.