Under a NASA program, a new engine has been developed for multi-role UAV aircraft with a wide range of missions, including very low temperatures in the Arctic and very long durations, up to 10 hours.

-It is a classic-looking 2-cylinder engine.

“3D CAD engine image”

-It has actually been designed by the US Naval Research Laboratory and developed by NASA at its Ames Research Center. This program was titled SIERRA or “Systems Integration Evaluation Remote Research Aircraft.”

“Real appearance of the engine, installed”