Aeronautics and astronautics – Aircraft structure – Fuel supply
Patent
1977-10-11
1980-11-04
Kelmachter, Barry L.
Aeronautics and astronautics
Aircraft structure
Fuel supply
244199, B64D 3900
Patent
active
042315360
ABSTRACT:
A ruddevator assembly for controlling movement of an aircraft refueling boom, comprising two ruddevators mounted to the boom, each at a dihedral angle of about 42.degree.. Each ruddevator has an outboard section, which is an advanced technology cambered airfoil for high lift at transonic speeds, with a raked wing tip. The inboard portion of the airfoil has a forwardly extending strake-like member having a sharp leading edge which in planform comprises three sections. There is a curved forward edge section and two rearwardly extending edge sections, which in operation are positioned at high sweep angles. The side edge portions of the strake-like member create vortices which travel over the inboard portion of the ruddevator to augment lift over a wide range of surface deflection of the ruddevator (i.e., angle of attack). The inboard vortex also smooths the flow over the boom housing, and another aerodynamic feature is that the hinge moments exerted on the ruddevators are relatively linear over a wide range of deflection, thus enhancing the control characteristics of the ruddevator assembly.
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Ishimitsu Kichio K.
Tinoco Edward N.
Kelmachter Barry L.
The Boeing Company
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