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Suitability of Military Specification Lubricants for Two-Stroke RPV Engines
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Sector:
Event:
Aerospace Meeting
Language:
English
Abstract
The Army is exploring the feasibility of using Remotely Piloted Vehicles (RPV's) in a multi-mission role. Powerplants for these RPV's are to be small, two-stroke, air-cooled, reciprocating engines which require a fuel/oil mix for operation. As no federal or military specification lubricant exists for this application, this paper details results of an analytical/experimental investigation to evaluate the suitability of existing MIL SPEC lubricant classes for Army RPV use. Performance of a limited sampling of military specification lubricants was evaluated by cyclic testing with a small two-stroke, air-cooled piston engine currently used in the Army AQUILA RPV. An ashless dispersant lubricant qualified to Boating Industry of America standards for two-cycle, water-cooled engines (BIA/TC-W) was used for reference. Standard magneto ignition and engine cooling were used in 20 of the 23 tests. The final three tests explored the combined effects of capacitive discharge ignition and elevated cylinder head temperature.
Authors
Citation
Marbach, H., Russell, J., and Smith, K., "Suitability of Military Specification Lubricants for Two-Stroke RPV Engines," SAE Technical Paper 770996, 1977, https://doi.org/10.4271/770996.Also In
References
- U.S. Government Specification VV-G-76B “Gasoline, Automotive (Leaded)” May 1974
- U.S. Military Specification MIL-G-5572E “Gasoline, Aviation” July 1969
- Boating Industry Association Standards Basis ABYC S-18-75 “BIA Certification Tests for TC-W and TC-2 Two-Cycle Engine Lubricants” 1975
- U.S. Military Specification MIL-L-22851B “Lubricating Oil, Aircraft Piston Engine, Type II and III (Ashless Dispersant)” December 1971
- U.S. Military Specification MIL-L-46152 “Lubricating Oil, Internal Combustion Engine, Administrative Service” November 1970
- U.S. Military Specification MIL-L-2104C “Lubricating Oil, Internal Combustion Engine (Heavy Duty)” November 1970
- U.S. Military Specification MIL-L-23699B “Lubricating Oil, Aircraft Turbine Engines, Synthetic Base” November 1971
- Russell, J.A. Lestz, S.J. “Rating Method and Lubricant Appetite Study for an Air-Cooled Rotary Engine” SAE 741068 October 1974