Symmetrical pendulum system on an axle, for demonstrating centrifugal force. The pendulum arms are held in a state of rest by a coil spring. Depending on the rotational speed, they are lifted against the force of gravity as the axle turns.
This can then be used to control the speed of a steam engine.
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for generating acoustically excited Chladni figures, 1000706 [U56006], Oscillations](/thumblibrary/U56006/U56006_01_140_140_Chladni-Plate-Square-for-generating-acoustically-excited-Chladni-figures.jpg)
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