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XF-11 Engine Testing

The XF-11 was powered by two twin cylinder 2-stroke drone engines modified to 273cc.  The starboard engine was additionally modified to turn in the opposite direction than the port engine. This gave the model additional stability about the Yaw axis.

Hours of testing each engine by the Aero Telemetry team helped make sure the engines would be operating at maximum power output during the flights.  The engines used fixed-pitch, counter-rotating propellers provided by the Tennessee Propeller Company.