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Full-scale transmission testing to evaluate advanced lubricantsExperimental tests were performed on the OH-58A helicopter main rotor transmission in the NASA Lewis 500 hp helicopter transmission test stand. The testing was part of a lubrication program. The objectives are to develop and show a separate lubricant for gearboxes with improved performance in life and load carrying capacity. The goal was to develop a testing procedure to fail certain transmission components using a MIL-L-23699 based reference oil and then to run identical tests with improved lubricants and show improved performance. The tests were directed at parts that failed due to marginal lubrication from Navy field experience. These failures included mast shaft bearing micropitting, sun gear and planet bearing fatigue, and spiral bevel gear scoring. A variety of tests were performed and over 900 hrs of total run time accumulated for these tests. Some success was achieved in developing a testing procedure to produce sun gear and planet bearing fatigue failures. Only marginal success was achieved in producing mast shaft bearing micropitting and spiral bevel gear scoring.
Document ID
19920017317
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lewicki, David G. (NASA Lewis Research Center Cleveland, OH, United States)
Decker, Harry J. (NASA Lewis Research Center Cleveland, OH, United States)
Shimski, John T. (Naval Air Propulsion Test Center Trenton, NJ., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-TM-105668
AVSCOM-TR-91-C-035
AD-A252382
NAS 1.15:105668
E-7032
Meeting Information
Meeting: International Power Transmission and Gearing Conference
Location: Phoenix, AZ
Country: United States
Start Date: September 13, 1992
End Date: September 16, 1992
Sponsors: ASME
Accession Number
92N26560
Funding Number(s)
PROJECT: RTOP 505-63-36
PROJECT: DA PROJ. 1L1-62211-A-47-A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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