Actuated roll axis aerial refueling boom

Details Actuated roll axis aerial refueling boom Actuated roll axis aerial refueling boom

1995-12-22

1998-07-28

Oberleitner, Robert J.

Aeronautics and astronautics

Aircraft structure

Fuel supply

244135R, B64D 3900

Patent

active

057852766

ABSTRACT:
An improvement in an airplane mounted aerial refueling boom wherein the boom assembly mounting permits motion about three axes. A first pivot attached to the fuselage of the airplane provides for radial or azimuth motion of the boom about a vertical or yaw axis of rotation essentially normal to the air stream. The second axis of motion, the pitch axis, is located below the airplane fuselage and perpendicular to the yaw axis so that the pitch axis rotates with any yaw motion of the boom and allows vertical displacement of the boom. Vertical and yaw displacement takes place in a conventional fashion. The third axis of motion, the roll axis, is located in-plane with and perpendicular to the pitch axis. This roll axis is coincident with the longitudinal centerline of the boom structural tube and a helical rotary actuator that produces a commanded roll motion as a function of pitch and yaw motion of the boom assembly. Rolling motion of the boom assembly serves to align the cross-sectional vertical chord axis of the boom and boom mounted aerodynamic surfaces with the local free stream air flow about the tanker airplane to minimize drag and optimize control authority.

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