Vertical takeoff and landing aircraft
First Claim
Patent Images
1. A vertical takeoff and landing aircraft, comprising:
- a) a fuselage having a forward end and a rearward end;
b) a wing mounted on and extending from said rearward end;
c) a horizontal stabilizer mounted on said forward end;
d) a pair of opposed booms independent of said wing and extending laterally of said fuselage between said wing and horizontal stabilizer;
e) each boom having an end distal of said fuselage to which is mounted a propeller nacelle carrying an unshrouded propeller having an axis of rotation, each nacelle being freely pivotable about a pivoting axis, each propeller having a plurality of propeller blades;
f) engine means for driving said propellers;
g) each propeller nacelle being pivotable between a first position wherein said axis of rotation is approximately horizontal and a second position wherein said axis of rotation is approximately vertical; and
h) brake means for restraining free pivoting movements of said nacelles, whereby release of said brake means permits free pivoting of said nacelles.
0 Assignments
0 Petitions
Accused Products
Abstract
A vertical takeoff and landing aircraft has a fuselage with a wing located above the fuselage at the rearward end and with a horizontal stabilizer located at the forward end. The propellers are mounted on booms separate from the wings and located just behind the center of gravity of the aircraft. The propellers are pivotable between horizontal and vertical axes and brakes are provided to allow locking of propeller position. When the brakes are released, the propellers automatically pivot between vertical and horizontal orientations and vice-versa based upon control of the aircraft by the pilot.
85 Citations
31 Claims
-
1. A vertical takeoff and landing aircraft, comprising:
-
a) a fuselage having a forward end and a rearward end; b) a wing mounted on and extending from said rearward end; c) a horizontal stabilizer mounted on said forward end; d) a pair of opposed booms independent of said wing and extending laterally of said fuselage between said wing and horizontal stabilizer; e) each boom having an end distal of said fuselage to which is mounted a propeller nacelle carrying an unshrouded propeller having an axis of rotation, each nacelle being freely pivotable about a pivoting axis, each propeller having a plurality of propeller blades; f) engine means for driving said propellers; g) each propeller nacelle being pivotable between a first position wherein said axis of rotation is approximately horizontal and a second position wherein said axis of rotation is approximately vertical; and h) brake means for restraining free pivoting movements of said nacelles, whereby release of said brake means permits free pivoting of said nacelles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. In a vertical takeoff and landing aircraft including two opposed propeller carrying nacelles freely pivotably mounted to move between generally horizontal and vertical orientations, the improvement comprising:
-
a) each propeller being unshrouded and driven by engine means; b) pitch varying means for varying propeller pitch; c) brake means for controllably preventing free pivoting of said nacelles; d) control means for controlling operation of said aircraft including control of said pitch varying means; e) said aircraft being flown from a position sitting on a ground surface with said nacelles in a generally vertical orientation and lifting off controlled by a pilot operating said control means, whereby release of said brake means allows (1) forward self-pivoting of said nacelles, responsive to controlled adjustment of said pitch varying means, to a generally horizontal orientation to permit horizontal flight of said aircraft, and (2) backward self-pivoting, responsive to controlled adjustment of said pitch varying means, to return from horizontal flight to hovering and landing. - View Dependent Claims (27, 28, 29, 30)
-
-
31. In a vertical takeoff and landing aircraft including opposed left and right nacelles, each carrying an unshrouded propeller having a plurality of blades comprising a left and right propeller, respectively, said nacelles being pivotably mounted to move between generally horizontal and vertical orientations, the improvement comprising said left propeller turning counterclockwise and said right propeller turning clockwise and each propeller including ditch variation means for varying cyclic pitch thereof, said nacelles pivoting on said aircraft, a roll control solely operated by varying lateral cyclic pitch of said propellers regardless of orientation of said nacelles whereby opposed rotation directions of said propellers results in additive direction of roll action of radial forces on said blades.
Specification