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Topic: Drive-Ins & 70mm: Has anyone actually done it?
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 05-07-2002 07:56 AM
Union Carbide (National Projector Carbons) experimented with carbon arc lamps that produced up to 42,000 lumens open gate. For example, an experimental 11mm "Ultrex" positive carbon ran at 195 amperes and 80 volts (15,600 watts) with a f/2.0 mirror system.The largest was a 13.6mm "Ultrex" positive operating at 290 amperes and 80 volts (23,200 watts) with a f/2.0 condenser lamp. Don't know if these lamps were ever commercialized. Buffalo NY had a drive-in equipped with 70mm Norelco projectors. It was the I-290 (it was located near that Interstate highway, just north of Buffalo).
------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243 e-mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion
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