Efficiency testing of a helicopter transmission planetary reduction stage
Robert F. Handschuh, Douglas A. Rohn, Lewis Research Center, United States. Army Avition Research and Technology Activity. Propulsion Directorate
National Aeronautics and Space Administration, Scientific and Technical Information Division, 1988 - Technology & Engineering - 15 pages
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100 percent speed 75 TORQUE analytical results applied torque calibrated carrier cm3/sec coefficient of friction Comparison with reference components described in reference drive motor efficiency increased experimental results flowmeter full power FULL TORQUE 100 function of torque gal/min gear lubricant gearbox Helicopter Transmission Planetary high-speed shaft inlet temperature input power INPUT SHAFT input torque Lewis Research Center load low-speed shafts lubricant flow rate lubricant properties lubricant type lubrication systems manifold nozzles oil flow rate oil-inlet temperature parametric study parametric tests percent of full planet bearings PLANET-RING planetary gear train planetary power losses planetary stage planetary test present study ranged from 99.44 reference 16 ring gear rotational speed shaft losses shown in figure slave planetary sections sliprings strain gage sun gear speed SYMBOLS DENOTE LUBRICANT test and slave test conditions test hardware Test parameters test planetary section thermocouples torque was decreased torquemeter turboprop U.S. Army viscosity