How do you make a part of a stage go up and down? Hydraulic cylinders are well known technical solutions. They are quiet (the pump is noisy, but that can be somewhere out of earshot), and positioning and speed control can be done with great sensitivity. However, they have the disadvantages of leaking (everything leaks eventually), and a straight lift cylinder requires a hole in the ground or a loss of building floor space below the stage. What are other options? “Rising Above It All: ...

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