Abstract:
VTOL micro-aircraft comprising a first and a second ducted rotor (1, 2) mutually aligned and distanced according to a common axis and whose propellers (4, 6) are driven in rotation in mutually opposite directions. Between the two ducted rotors (1, 2) are positioned a fuselage (3) and a wing system (13) formed by wing profiles (10, 11) forming an X or an H configuration and provided with control flaps (16).
Abstract:
An unmanned rotor carried aerial vehicle comprises a propulsion unit (5) and a carrier (7) suspended from the propulsion unit. The propulsion unit (5) is connected to the carrier (7) via a cardan-like joint (9) for permitting limited tilting of the propulsion unit relative to the carrier in two orthogonal directions corresponding to the roll and pitch directions of the vehicle and for preventing relative movement between the propulsion unit and the carrier in the yaw direction of the vehicle.
Abstract:
A snubber assembly (230) for an unmanned aerial vehicle (10) including a rotor assembly (100) having ducted counter-rotating rotors (200, 202), the rotor assembly (100) including a rotor shaft (128R or 130R), a torque tube (270) having an inboard end, and a flexbeam (260) having an inboard end (262), comprising:
a bracket (238) configured to be secured in combination with the inboard end of the torque tube (270); a spherical bearing (232) secured in combination with said bracket (238); and a rotor hub (204), configured for securement in interlocked, engaged combination with the rotor shaft (128R or 130R), having a plurality of radially extending arms (214), each of said radially extending arms (214) including means for securing the inboard end (262) of the flexbeam (260) in combination with the rotor hub (204) and means for rotatably mounting said spherical bearing (232), bracket (238) combination internally in said rotor hub (204); said internally rotatably mounted spherical bearing (232), bracket (238) combination being positioned inboard of said outboard end of said radially extending arm (214) and inboard of the inboard end (262) of the flexbeam (260); characterized in that said securing means of each said radially extending arm (214) comprises a clevis (220); and said rotatably mounting means for each said radially extending arm (214) comprises an inboard internal bulkhead (223), an outboard internal bulkhead (224), said inboard and outboard internal bulkheads (223, 224) in combination defining a bearing cavity (225) and an inboard cavity (226), and a bearing bolt (234); said bearing bolt (234) being disposed in combination with said outboard internal bulkhead (224), said spherical bearing (232), and said inboard internal bulkhead (223) for rotatably mounting said spherical bearing (232), bracket (238) combination in said bearing cavity (225).
Abstract:
Redundancy in engine timing position sensing maintains a UAV operational in the event of failure of a primary engine timing position sub-system. The redundancy avoids duplication of the primary crankshaft timing position sensing components, and avoids adding weight, cost and component complexity. Conditioned (square) waveform(s) (102) is/are created from respective sinusoidal waveform(s). Each consecutive leading edge (103a) and trailing edge (103b) of the pulses of the square waveform (102) is derived from the crossing of the zero voltage value by consecutive sinusoidal waveforms A,B,C (e.g. Voltage (V) vs Time (t) or angular degrees). The square pulse waveform (102) is output (104) to a microcontroller (106) to create and output a pseudo crankshaft timing position signal (108) to be used by an ECU to determine ignition and fuel injection events in the event that the primary timing signal from the crankshaft position sensor (CPS) has failed. The signal (108) output to the ECU can have a missing pulse (116) (i.e. indicative of a TDC position of the engine crankshaft) as well as multiple square pulses (114) corresponding to the pulses of the initial square pulse waveform (102). The waveform signal (108) is therefore derived from the alternator waveform signal(s) and provides a pseudo crankshaft timing position signal in the event of failure of the primary or initial CPS signal.
Abstract:
Die Erfindung betrifft ein unbemanntes Luftfahrzeug (10), dessen Antrieb (12) einen als Diesel- und/oder Kerosinmotor ausgebildeten Verbrennungsmotor (28) mit Ladereinrichtung (30) zur Motoraufladung umfasst. Insbesondere ist als Antrieb (12) ein Hybridantrieb (32), mehr insbesondere ein Parallel-Hybridantrieb, vorgesehen.
Abstract:
A turboprop-powered medium altitude long endurance aircraft, comprising: a gas turbine engine (8); heat scavenging apparatus (44), for example a thermal blanket comprising capillary tubing,arranged to scavenge heat from the gas turbine engine (8); and heating apparatus arranged to use the scavenged heat to provide heating to the aircraft. The heat scavenging apparatus (44) may be placed on an engine casing (14) and/or on or in an engine exhaust duct (16).The heating apparatus may comprise a circulation path (40) routed directly to a location in the aircraft where heating is to be performed, for example a leading edge of an engine support pylon (6) or a leading edge of an engine-carrying wing. The heating apparatus may comprise a heat exchanger (53 and/or 52).
Abstract:
La presente invención se refiere a un nuevo dirigible en el cual se instalan cámaras infrarrojas y radares para monitoreo de zonas urbanas y ductos de conducción de gas o derivados petrolíferos, para detección de fugas, así como para Ia revisión de los mismos; también para el transporte de refacciones y/o herramienta para Ia reparación de dichos ductos.
Abstract:
Method and systems for starting propeller driven aircraft and other devices. A system in accordance with one embodiment of the invention includes a removable fixture (130) that is coupled to the propeller (120) and has at least one portion (131a) exposed to a flowstream to rotate the propeller during engine start-up. The fixture is configured to separate from the propeller after the engine (110) begins to turn over (e.g., after the engine starts and/or rotates above a threshold rate). Accordingly, the system can include a releasable link (132) between the fixture and the propeller.