Advanced airbreathing engine lubricants study with a tetraester fluid and a synthetic paraffinic oil at 492 K (425 F).
- Author:
- Zaretsky, E. V.
- Published:
- Apr 1, 1972.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Bamberger, E. N.
Online Version
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access - Summary:
- Groups of 120-mm-bore angular-contact ball bearings made from AISI M-50 steel were fatigue tested with a tetraester and a synthetic paraffinic oil at a bearing temperature of 492 K (425 F) in an air environment. Bearing life exceeded AFBMA-predicted (catalog) life by factors in excess of 4 and 10 for the tetraester and synthetic paraffinic fluids, respectively. The final viscosities after 500 hours of operation were 14 and 6 times the initial values, respectively. During the same time period, when the test oil is replaced at a rate approximating the replenishment rate in actual commercial engine usage, no significant increase in lubricant viscosity with time was observed.
- Other Subject(s):
- Collection:
- NASA Technical Reports Server (NTRS) Collection.
- Note:
- Document ID: 19720014846.
Accession ID: 72N22496.
E-6541.
NASA-TN-D-6771. - Terms of Use and Reproduction:
- No Copyright.
View MARC record | catkey: 15946960