Abstract:
Gyroptère à voilures tournantes contrarotatives coaxiales, avec en particulier celui de deux rotors couronnes tournantes (2,1) en sens inverse autour d'une nacelle (6) soit en version drone, soit en version nacelle habitée, avec procédé du pilotage de la machine par la commande de l'incidence des pales par des anneaux de commande, la sécurité est avantageusement renforcée par des structures adaptée, une enveloppe protectrice multifonction (27) par un système de sustentation entre les couronnes (2,1) et la nacelle (6) tant pour les forces radiales qu'axiales participe à la maîtrise optimisée des tensions, et avec commandes électriques adaptée tant pour modélisme, drone, qu'aéronef habité et ou piloté.
Abstract:
This invention relates to ring-wing aircraft and is suited particularly, although not exclusively, to use in micro-unmanned air vehicles (UAV's) with ring-wings. An aircraft (10) according to the invention comprises a ring-wing (11) defining a duct (16) with a longitudinally-extending central axis (31), propulsion means (15) located within the duct and moveable aerofoils (13, 18) for controlling the aircraft in flight, the ring-wing being truncated obliquely at one end, that end being the rear (11b) when in horizontal flight, to form a ring-wing with opposed sides of unequal length. This arrangement produces centre of mass offset from the central axis of the ring-wing, the pendulum effect will ensure that the aircraft will roll so that its centre of mass will always be at the lowest height possible when the aircraft is airborne. Therefore the aircraft has a preferred orientation, and the control surfaces can be oriented with respect to this preferred orientation. In addition, the oblique truncation at the rear keeps the centre of mass towards the front of the aircraft thereby giving improved stability in all three axes.
Abstract:
A method for reducing a nose-up pitching moment in an unmanned aerial vehicle (10) during forward flight. The unmanned aerial vehicle includes counter-rotating rotor assemblies (38, 40) that are mounted within a duct (18). Each rotor assembly (38, 40) includes a plurality of rotor blades. The method involves adjusting the rotor blades to have substantially zero pitch. Then rotating the rotor asemblies (38, 40) to produce a virtual plane (62) across the duct (18). The virtual plane (62) is operative for substantially deflecting air (70) passing over the fuselage (44) away from the duct (18). In one embodiment of the invention, the method involves the further step of obstructing at least a portion of the bottom of the duct (18) to inhibit air (70) that is flowing across the bottom of the duct from passing into the duct (18).
Abstract:
본 발명은 몸체(120)와, 회전축(131)과 블레이드(135)로 이루어지며 몸체(120)에 연결되어 설치되는 두 개 이상의 회전부(130)와, 상기 몸체(120)와 회전부(130)를 감싸도록 설치되며 개구부(201a)가 형성된 케이스(201)로 이루어지는 수직이착륙기(100), 상기 케이스(201)를 회전부(130)를 감싸도록 설치되며 개구부(201a)가 형성된 덕트 형상으로 형성하거나, 상기 케이스(201)가 회전부(130)의 블레이드(135) 둘레로 측벽(203)을 구비하거나 또는 상기 개구부(201a)에 보호수단(207)을 구비하는 수직이착륙기(100)에 관한 것으로, 상기 수직이착륙기(100)는 두 개 이상의 회전부(130)를 구비하여 별도의 장치를 구비하지 않는 경우에도 회전부(130)의 회전에 의한 반동 토크를 상쇄시킬 수 있으며, 회전부(130)의 블레이드(135)를 감싸도록 설치되는 케이스(201)를 구비하여 블레이드(135)가 케이스(201) 내에서 회전하므로 전진 비행시 회전익기에서 나타나는 블레이드(135)의 회전에 의한 양력 불균형이 소멸하고, 회전부(130)가 외부 물체와 접촉하는 것을 방지할 수 있으므로 외부 물체와의 접촉에 의한 회전부(130)의 손상이나 외부 물체의 파손 또는 인체의 부상을 방지할 수 있으며, 덕트 형상으로 케이스(201)를 형성하거나 또는 케이스(201)에 측벽(203)을 구비함으로써 약10∼15%정도 추력이 증가하며, 개구부(201a)에 방향타(301)를 구비하여 방향타(301)의 설치 방향에 따라 요잉(Yawing)운동이나 전후진 운동을 자유롭게 할 수 있는 수직이착륙기(100)를 제공하는 것이다. 수직이착륙기, 케이스, 측벽, 보호수단, 방향타
Abstract:
PURPOSE: A VTOL(vertical takeoff or landing) aircraft by using a variable vane system is provided to control the yaw of a fuselage by offsetting torque from a propeller with plural variable yaw vanes and adjusting the angle of the vane, and to adjust pitch and rolling by using the drag with operating pitch and roll vanes. CONSTITUTION: A VTOL(vertical takeoff or landing) aircraft is composed of a propelling system having a propeller(1) and an engine(2); a torque control unit having a fixed yaw vane(3) and a variable yaw vane(4) installed in the lower part of the propeller to control yawing of the fuselage; a front pitch vane(5) and a rear pitch vane(6) controlling the direction of the fuselage pitch; a right roll vane(7) and a left roll vane(8) controlling rolling of the aircraft; and a duct(9) surrounding the propeller. Torque from the propeller system and yawing of the fuselage are controlled with the fixed yaw vane and the variable yaw vane. The size of the fuselage is reduced by eliminating a tail rotor from the yaw vane system, and breakage of the aircraft is minimized against collision. The structure is simplified, and maintenance is conveniently performed by using pitch and roll vanes. The performance of the propeller is improved with protecting the propeller by the duct.
Abstract:
A propeller alignment device is described. The propeller alignment device can include a second retainer attached to a propeller and a motor. The propeller alignment device can also include a first retainer that does not rotate, but that is aligned with the second retainer. The first retainer can include two or more magnets oppositely orientated relative to each other. The second retainer can also include two or more magnets oppositely orientated relative to each other. As the second retainer rotates relative to the first retainer, the magnets may alternatingly align with each other. In the absence of a current applied to the motor, the magnets may magnetically bias the second retainer into a predetermined orientation relative to the first retainer. The predetermined orientation can be predetermined to correspond to an alignment of the propeller that is desirable (e.g., that minimizes aerodynamic drag on the propeller).