NASA NTRS · 19700000186
Two-speed wheel-drive system without lubrication
Abstract
System based on sprockets and toothed belts provides high and low speeds in forward drive and high speed in reverse. It is inexpensive to produce and maintain, light in weight, reliable, and long-lived without lubrication.
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Burch, J. L.. 1970-09-01. Two-speed wheel-drive system without lubrication. https://ntrs.nasa.gov/citations/19700000186
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