Abstract:
The present invention relates to an aircraft comprising a fuselage (100) comprising a fuselage axis (101), a first wing arrangement (110) and a second wing arrangement (120). The first wing arrangement (110) is mounted to the fuselage (100) such that the first wing arrangement (110) is tiltable around a first rotary wing axis (111) of the first wing arrangement (110) and such that the first wing arrangement (110) is rotatable around the fuselage axis (101). The first wing arrangement (110) is adapted in such a way that, in a fixed-wing flight mode, the first wing arrangement (110) do not rotate around the fuselage axis (101). The first wing arrangement (110) is further adapted in such a way that, in a hover flight mode, the first wing arrangement (110) is tilted around the respective first rotary wing axis (111) with respect to its orientation in the fixed-wing flight mode and that the first wing arrangement (110) rotates around the fuselage axis (101). The aircraft further comprises an extendible lift increasing system which is arranged to the first wing arrangement (110) for selectively amending a lift area of the first wing arrangement (110) in the fixed-wing flight mode and the hover flight mode.
Abstract:
The present invention relates to a device for generating aerodynamic lift and in particular an aircraft (100) for vertical take-off and landing. A wing arrangement (110) comprises at least one propulsion unit (111), wherein the propulsion unit (111) comprises a rotating mass which is rotatable around a rotary axis (117). The wing arrangement (110) is mounted to a fuselage (101) such that the wing arrangement (110) is tiltable around a longitudinal wing axis (112) of the wing arrangement (110) and such that the wing arrangement (110) is rotatable with respect to the fuselage (101) around a further rotary axis that differs to the longitudinal wing axis (112). An adjusting mechanism adjusts a tilting angle of the wing arrangement (110) around the longitudinal wing axis (112) under influence of a precession force (Fp) which forces the wing arrangement (110) to tilt around the longitudinal wing axis (112).
Abstract:
The present invention relates to an aircraft comprising a fuselage (100) comprising a fuselage axis (101), a first wing arrangement (110) and a second wing arrangement (120). The first wing arrangement (110) is mounted to the fuselage (100) such that the first wing arrangement (110) is tiltable around a first longitudinal wing axis (111) of the first wing arrangement (110) and such that the first wing arrangement (110) is rotatable around the fuselage axis (101). The second wing arrangement (120) comprises at least one propulsion unit (122), wherein the second wing arrangement (120) is mounted to the fuselage (100) such that the second wing arrangement (120) is tiltable around a second longitudinal wing axis (121) of the second wing arrangement (120) and such that the second wing arrangement (120) is rotatable around the fuselage axis (101). The first wing arrangement (110) and the second wing arrangement (120) are adapted in such a way that, in a fixed-wing flight mode, the first wing arrangement (110) and the second wing arrangement (120) do not rotate around the fuselage axis (101). The first wing arrangement (110) and the second wing arrangement (120) are further adapted in such a way that, in a hover flight mode, the first wing arrangement (110) and the second wing arrangement (120) are tilted around the respective first longitudinal wing axis (111) and the respective second longitudinal wing axis (121) with respect to its orientations in the fixed-wing flight mode and that the first wing arrangement (110) and the second wing arrangement (120) rotate around the fuselage axis (101).
Abstract:
A system for controlling inbound transition of an aircraft includes a fuselage and first and second freewings pivotably mounted on opposing sides thereof. The system includes an airspeed sensor that outputs an airspeed indication signal. The system includes a controller for increasing aircraft engine thrust to substantially maximum for inbound transition, and for generating pitch and freewing control signals. The system includes actuators for actuating aircraft control surfaces in response to the pitch control signal to rapidly increase pitch of the fuselage to decelerate the aircraft, and for actuating freewing control surfaces in response to the freewing control signal to adjust lift produced by the freewings to oppose climbing of the aircraft due to the increase in engine thrust and the increase in the fuselage pitch. The controller is configured to decrease the engine thrust as the aircraft decelerates until the aircraft is in a hover mode.
Abstract:
The invention concerns an aircraft with vertical take-off and landing having a passenger cabin (3) remaining horizontal whatever the angle of inclination of the aircraft, characterised in that the support stands (69), (70), (71) and (72) in contact with the ground are supported each by a beam bearing a change-over flap (77), (78), (79) and (80) pivoting about an axis perpendicular to the aircraft axis and located in the vertical extension of the beam, the aircraft being vertical.
Abstract:
A dual flight mode aircraft enables efficient forward-flight and hover modes. The aircraft comprises: a fuselage defining a nose and a tail, including a wing attachment region positioned between the nose and the tail, and a tail surface attachment region positioned between the wing attachment region and the tail; a starboard wing connected to the wing attachment region using a starboard spar, the starboard wing also connected to a starboard motor; a port wing connected to the wing attachment region using a port spar, the port wing also connected to a port motor; a rotation mechanism connected to the fuselage for rotating the starboard wing about a longitudinal axis of the starboard spar, and for rotating the port wing about a longitudinal axis of the port spar, wherein the starboard wing rotates generally counter to a direction of rotation of the port wing; and a tail surface connected to the tail surface attachment region.
Abstract:
An aerial vehicle (50) for vertical take-off and landing and horizontal flight comprises two wings (31, 32) extending substantially parallel to a Y-axis in spanwise direction, substantially parallel to an X-axis in chordwise direction, and extending substantially parallel to a Z- axis in thickness direction. The wings are substantially symmetrical with respect to a XZ-plane. The aerial device comprises at least four propulsion units (3, 4, 5, 6), each propulsion unit being rigidly mounted to the wings with a respective nacelle and configured to generate a force vector along a respective imaginary force vector line, said force vector line, for a subset of at least two of the propulsion units, when projected on the XY-plane, being oriented at a first angle with respect to the X-axis, and when projected on the XZ- plane, is further oriented at a second angle with respect to the X-axis.
Abstract:
A propeller includes a blade free to rotate. A first stop is positioned to mechanically engage one or both of a first portion of the blade and a first structure coupled to the blade when the blade is in a first position at a first end of the rotational range of motion. A second stop is positioned to mechanically engage one or both of a second portion, of the blade and a second structure coupled to the blade when the bia.de is in a second position at a second end of the defined rotational range. The blade rotates to the first position against the first stop when the propeller is rotated in a first direction and to the second position against the second stop when the propeller is rotated in a second direction.
Abstract:
An air vehicle (10) comprising a main body (12)and a pair of opposing wing members (14a, 14b) extending substantially laterally from the main body (12), at least a first propulsion device (16) associated with a first of said wing members (14a) and a second propulsion device (16) associated with a second of said wing members (14b), each said propulsion device (16) being arranged and configured to generate linear thrust relative to said main body (12), in use, the air vehicle further comprising a control module for generating a control signal configured to change a mode of flying of said air vehicle, in use, between a fixed wing mode (Figure 2) and a rotary wing mode (Figure 3), wherein, in said fixed wing mode of flying, the direction of thrust generated by the first propulsion device (16) relative to the main body (12) is the same as the direction of thrust generated by the second propulsion device (16), and in said second mode of flying, the direction of thrust generated by the first propulsion device (16) relative to the main body is opposite to that generated by the second propulsion device (16).