Accession Number:

ADA021231

Title:

Foaming Characteristics of MIL-L-7808 Turbine Lubricants.

Descriptive Note:

Technical rept. Jun 73-Apr 75,

Corporate Author:

AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Smith,H. A.
• Centers,P. W.
• Craig,W. R.

Report Date:

1975-11-01

Pagination or Media Count:

88.0

Abstract:

An investigation of MIL-L-7808 lubricant foaming was conducted to 1 determine the effects of air flow, temperature, simulated altitude conditions, and aeration time on lubricant foaming characteristics, 2 develop test methods for the qualification and lot acceptance testing of MIL-L-7808 lubricants with respect to foaming, 3 investigate the dispersion characteristics of the anti-foam additive used in some lubricant formulations and the associated changes in lubricant foaming during storage due to loss of anti-foam additive. This investigation has shown 1 effect of varying test parameters including aeration rates and temperature on lubricant foaming can vary dramatically with different formulations, 2 foaming characteristics of the fourteen lubricants investigated at simulated altitude conditions exhibited the same relative foam characteristics when tested at ground level conditions, 3 lubricant foaming characteristics can change significantly in storage, 4 the relative ranking of foaming characteristics for the fourteen lubricants investigated was the same for both the dynamic and static test.

Descriptors:

• *LUBRICANTS
• *FOAM
• *AIRCRAFT ENGINE OILS
• TEMPERATURE
• FORMULATIONS
• TEST METHODS
• QUALITY CONTROL
• TURBINES
• ALTITUDE
• AERATION
• LUBRICANT ADDITIVES
• FOAMING INHIBITORS

Subject Categories:

• Lubricants and Hydraulic Fluids
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE