A two axis controller for controlling a tanker aircraft in-flight refueling boom while maneuvering prior to engagement with the receiver aircraft and including a boom load alleviation system after engagement. Movement of the control stick is transmitted mechanically to a position transducer. The transducer...http://www.google.es/patents/US4150803?utm_source=gb-gplus-sharePatente US4150803 - Two axes controller
