Abstract:
An aircraft includes propellers (21, 22) at a center of the airframe (1); a first power source (23); a pitch adjuster (51-1, 51-2, 52); attitude control propellers (31-1, 31-2, 31-3, 31-4); a second power source (32-1, 32-2, 32-3, 32-4); and a control circuit (100) to control attitude of the airframe (1). The control circuit (100) includes a first yaw rotation generation control unit to control first yaw rotation generated by torques of the propellers (21, 22) with the pitch adjuster; and a second yaw rotation generation control unit to control a second yaw rotation generated by torques generated by a difference in rotation speed between the attitude control propellers (31-1, 31-2, 31-3, 31-4). The control circuit is configured to control the first yaw rotation generation control unit and the second yaw rotation generation control unit in accordance with a magnitude of a command value of yaw rotation.
Abstract:
An unmanned aerial vehicle has an internal combustion engine, and a fuel and lubrication system comprising a fuelling system for fuelling the engine and a lubrication system for delivering lubricating oil to the engine. The fuelling system comprises a fuel reservoir from which fuel can be delivered to the engine. The fuel reservoir comprises a main tank and a header tank. The lubrication system comprises an oil tank. The oil tank is accommodated internally within the main tank to provide an integrated assembly. The arrangement provides for warming of lubrication oil for the UAV engine using several available heat sources. Further, the arrangement facilitates a configuration and layout intended to minimise or negate any undesirable moments of inertia for the UAV during flight as fuel and oil is consumed.
Abstract:
Die Erfindung betrifft einen Bausatz (104) und ein Herstellverfahren zum Herstellen eines unbemannten Luftfahrzeugs (10) mit einem maximalen Startgewicht von wenigstens 250kg, wobei der Bausatz (104) eine Rumpfstruktur (13) mit einer Auftriebserzeugungsstrukturbefestigungsschnittstelle (24) zur Befestigung einer Auftriebserzeugungsstruktur (14) und weiter eine erste Auftriebserzeugungsstrukur (14a) und eine unterschiedliche zweite Auftriebserzeugungsstruktur (14b) aufweist, wobei die erste und die zweite Auftriebsstrukturerzeugungsstruktur (14a, 14b) jeweils eine gleich ausgebildete Rumpfstrukturbefestigungsschnittstelle (25) zur Befestigung an der Auftriebsstrukturerzeugungsschnittstelle (24) der Rumpfstruktur (13) aufweist.
Abstract:
The present invention relates to a rotary-wing drone (1) comprising a frame in which are located: - a set of sensors (13) designed for performing tasks of surveillance and/or intelligence gathering and/or assisting with the guidance of the drone (1), and - a control unit (14) associated with this set of sensors (13), characterized in that it comprises a diesel engine (4).
Abstract:
A turboprop-powered medium altitude long endurance aircraft, having a gas turbine engine; a heat scavenging device to scavenge heat from the gas turbine engine; and a heating device to use the scavenged heat to provide heating to the aircraft. The heat scavenging device may be placed on an engine casing and/or on or in an engine exhaust duct. The heating device may include a circulation path routed directly to a location in the aircraft where heating is to be performed, for example a leading edge of an engine support pylon or a leading edge of an engine-carrying wing. The heating device can include a heat exchanger.
Abstract:
A vertical take-off and landing miniature aerial vehicle includes an upper fuselage segment (12) and a lower fuselage segment (14) that extend in opposite directions from a rotor guard assembly (16). A rotor (52) rotates within the rotor guard assembly (16) between the fuselage segments(12, 14). Plural turning vanes (28) extend from the rotor guard assembly (16) beneath the rotor (52). Moreover, plural grid fins (26) extend radially from the lower fuselage segment (14) below the turning vanes (28). The aerial vehicle is capable of taking off and landing vertically. During flight, the aerial vehicle can hover and transition between a horizontal flight mode and a vertical flight mode using the grid fins (26).
Abstract:
An aircraft attack interdiction system using an unmanned interdiction aircraft piloted using a remote control system. In-flight refueling system, weapons launcher systems and intelligence gathering equipment are mounted on the interdiction aircraft. A remote flight control operator to remotely fly the interdiction aircraft can be based on a remote flight control commander aircraft that can be flown at safe distances from targets that are attacked by the interdiction aircraft
Abstract:
A coaxial transmission/center hub subassembly (110) for a rotor assembly (100) of an unmanned aerial vehicle (10) having ducted, coaxial counter-rotating rotors (200, 202) defining a rotational axis (12) for the unmanned aerial vehicle (10), the unmanned aerial vehicle (10) having a toroidal fuselage (20) with a plurality of inwardly extending support struts (24) and including a powerplant subsystem (50), the rotor assembly (100) including upper and lower swashplate subassemblies (80), comprising:
center hub support structure means (160, 146) intermediate said counter-rotating rotors (200, 202) for mounting said coaxial transmission/center hub (110) assembly in fixed coaxial relation to the toroidal fuselage (20) utilizing the plurality of inwardly extending support struts (24); a multi-member transmission housing (140); and a single stage transmission subsystem (120); characterized in that
said multi-member transmission housing (140) includes upper and lower standpipe housings (142, 144) secured in combination with said center hub support structure means (160, 146) in opposed relation along the rotational axis (12) of the unmanned aerial vehicle (10), said upper and lower standpipe housings (142, 144) having external surfaces (142E, 144E) that function as sliding surfaces for the upper and lower swashplate subassemblies (80), respectively; and said single stage transmission subsystem (120) includes an upper bevel gear (128) that includes an upper rotor shaft (128R) rotatably mounted in combination with said upper standpipe housing (142), a lower bevel gear (130) that includes a lower rotor shaft (130R) rotatably mounted in combination with said lower standpipe housing (144), said upper and lower rotor shafts (128R, 130R) providing means for mounting the counter-rotating rotors (200, 202) in combination with said coaxial transmission/center hub subassembly (110), and an input gear (122) rotatably mounted in said center hub support structure means (160, 146) and being mechanically coupled in combination with said upper and lower bevel gears (128, 130) and the powerplant subsystem (50) to couple torque to the counter-rotating rotors (200, 202).
Abstract:
The VTOL aircraft (10) includes a free wing (16) having wings on opposite sides of the fuselage (12) connected to one another for joint free rotation and for differential pitch settings under pilot, computer or remote control. On vertical launch, pitch, yaw and roll control is effected by the elevators (26), rudder (24) and the differential pitch settings of the wings, respectively. At launch, the elevator (26) pitches the fuselage (12) nose downwardly to alter the thrust vector and provide horizontal speed to the aircraft whereby the free wing (16) rotates relative to the fuselage (12) into a generally horizontal orientation to provide lift during horizontal flight. Transition from horizontal to vertical flight is achieved by the reverse process and the aircraft may be gently recovered in or on a resilient surface such as a net (66).