Low-Cost ACL Fixtures

John Holloway

 

The problem presented was to produce a large number of fixtures for PAR-36-size ACL (aircraft landing) lamps. The fixtures would need to be focusable along both the horizontal and vertical axes. They should be durable, functional, inexpensive, easy to make, and should not look shop-built. They were to be mounted on an octagonal lighting truss made of welded square tube, and wired in series in groups of four to maintain the proper voltage.

Parts needed would include a barrel housing to hold the lamp, a yoke to provide for movement along the vertical axis, and a fastener to hold the unit to the truss and to provide for movement along the horizontal axis. It was immediately apparent that the material of ...

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