Thread: Discussion Japanes Ball Drone.
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Old Aug 16, 2011, 04:21 AM
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Well, precession shifts a tilting moment along the rotation of the disk. This can be used to stabilize a device, for example a spinning top: as the top tilts, precession makes it tilt sideways rather than in the direction of the initial balance. this moves the contact point on its shaft sideways, meaning that the shaft will contact the ground off center and pull the top upright. On an helicopter the precession on the flybar plane of rotation is used to change the incidence of the rotor blades so that the rotor plane of rotation will compensate. But with a fixed prop the precession will only send the prop moving in a conical path. This also happens with the turboplan, but the spinning mass is large enough and the conical path is so wide that the pilot has plenty of time to compensate, while a smaller mass would tilt much quicker
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