contra-rotating generators

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Wimshurst machine — Suppose that the conditions are as in the figure that is the segment A1 is positive and the segment B1 negative. Now, as A1 moves to the left and B1 to the right, their potentials will rise on account of the work done in separating them against… … Wikipedia
Constant Speed Drive — Mechanism CSDs are mainly used on airliner and military aircraft jet engines to drive the alternating current (AC) electrical generator. In order to produce the proper voltage at a constant AC frequency, usually 3 phase 115 VAC at 400 Hz, a… … Wikipedia
Unconventional wind turbines — Wind turbines History Design Manufacturers Unconventional As of 2010, the most common type of wind turbine is the three bladed horizontal axis wind turbine (HAWT). This article deals with various types of wind turbine that differ from the… … Wikipedia
Naval mine — Polish wz. 08/39 contact mine. The protuberances around the top of the mine, called Hertz horns, are part of the detonation mechanism … Wikipedia

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