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Technical Design Solutions for Theatre by Don Harvey, Ben Sammler

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David Kriebs

Low-Pressure Air Casters

 

Air casters powered by a large volume of low-pressure air from a vacuum cleaner can be constructed in any woodworking shop. Most vacuum cleaners will supply sufficient air for two 12″-radius casters, and a typical system using two vacuum cleaners and four 12″-radius casters can move over one ton. The following design and construction procedures work for casters with radii between 9″ and 12″. Sealing the gaskets of larger casters becomes difficult.

DESIGN PROCEDURE

1. Determine the pressure generated by a given vacuum cleaner with the following formula:

image

Find W by holding the nozzle vertically, covering ...

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