Aircraft with retractable rotor wing
First Claim
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1. An aircraft comprising:
- an airframe having a longitudinal axis,a drive shaft rotatably mounted in said airframe substantially perpendicular to the longitudinal axis,a wing attached to one end of said drive shaft, the wing having multiple extended arms of airfoil cross section,drive means coupled to said drive shaft for rotating the wing,said wing arms having variable pitch tip portions,control means coupled to said tip portions for cyclically controlling the pitch thereof during wing rotation,wing actuating means including a telescopic mast having a fixed outer portion secured in the airframe coaxial with said drive shaft,a movable mast axially slidable in said outer portion,said wing being rotatably mounted on said movable mast,an actuator connected between said outer portion and said movable mast for extension and retraction of the movable mast,stop means on the airframe for holding the wing in the retracted position with certain of said arms extending on opposite sides of the airframe, and said control means including a pitch control shaft extending from each of said wing arms, and actuators mounted on said movable mast and connected to said pitch control shafts.
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Abstract
An aircraft having a rotor wing which in one position is locked against theirframe for forward flight, and in another position is extended clear of the airframe. In the extended position the wing is rotated and the tip portions are controllable in the manner of a helicopter rotor. A single power source provides propulsive and wing rotation power. In the preferred form the power source is a turbojet engine and the wing is rotated by a tip jet powered drive beam, separated from the wing to avoid aerodynamic interference. For forward flight the drive beam is enclosed in the airframe as the wing is retracted to fixed position.
66 Citations
9 Claims
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1. An aircraft comprising:
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an airframe having a longitudinal axis, a drive shaft rotatably mounted in said airframe substantially perpendicular to the longitudinal axis, a wing attached to one end of said drive shaft, the wing having multiple extended arms of airfoil cross section, drive means coupled to said drive shaft for rotating the wing, said wing arms having variable pitch tip portions, control means coupled to said tip portions for cyclically controlling the pitch thereof during wing rotation, wing actuating means including a telescopic mast having a fixed outer portion secured in the airframe coaxial with said drive shaft, a movable mast axially slidable in said outer portion, said wing being rotatably mounted on said movable mast, an actuator connected between said outer portion and said movable mast for extension and retraction of the movable mast, stop means on the airframe for holding the wing in the retracted position with certain of said arms extending on opposite sides of the airframe, and said control means including a pitch control shaft extending from each of said wing arms, and actuators mounted on said movable mast and connected to said pitch control shafts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification