NASA NTRS · 19900017018
Efficiency study comparing two helicopter planetary reduction stages
Abstract
A study was conducted to compare the efficiency of two helicopter transmission planetary reduction stages. Experimental measurements and analytical predictions were made. The analysis predicted and experiments verified that one planetary stage was a more efficient design due to the type of planet bearing used in the stage. The effects of torque, speed, lubricant type, and lubricant temperature on planetary efficiency are discussed.
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Krantz, Timothy L., Handschuh, Robert F.. 1990-07-01. Efficiency study comparing two helicopter planetary reduction stages. https://ntrs.nasa.gov/citations/19900017018
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