Characterization and Analysis of the UEL 1100 Oil Pump

Report No. ARL-TR-4520
Authors: Logan P. Riley and Albert K. Owen
Date/Pages: June 2009; 22 pages
Abstract: The U.S. Army's Shadow unmanned aerial vehicle (UAV) is an indispensable tool in modern military intelligence acquisition. The Shadow is powered by one UEL 1100 engine, a single-rotor Wankel engine. However, at high-altitude, low-temperature conditions, engine operation may be compromised due to insufficient oil delivery to the engine. To develop a better understanding of the engine system's oil delivery, we have evaluated the performance of the oil pump. Testing consisted of measuring oil pumping capability at various temperatures and speeds, and with different grades of oil.
Distribution: Approved for public release
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Last Update / Reviewed: June 1, 2009