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Old Dec 06, 2012, 08:14 PM
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United States, MT, Kalispell
Joined Aug 2004
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Originally Posted by peterlngh View Post
Hi, RoboSerg.

A sailplane, not a hotliner, will generally use a motor with a kv from 850-1200. One wants to be able to swing a large prop to generate thrust at low speed.

A non folding prop will generate so much drag, particularly if it windmills, that soaring will be virtually impossible.

Soaring time depends on how much current one uses with the motor. A sailplane with four micro servos will be able to run the radio for well over an hour if one doesn't spend time flying under power.
Hi, peter.
Just curious why you think a freewheeling prop generates more drag than a stationary prop? I can't think of how that's possible.

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