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XF-11 Landing Gear

Due to the sheer size of the XF-11 and the compressed schedule, the retractable landing gear needed to be built from scratch. Darrel Hofmann, Joe Bok, John Keefe, and Butch Fleck designed a system that included the main pivot structure, hydraulic actuators, and nitrogen filled struts, all powered by a 28VDC Parker Hannifan Oildyne Pump.

The flawless operation of the massive landing gear was a main contributor to the success of the Aero Telemetry XF-11 airplane.