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Both theStandard DPD single-thrusterand DPD-XT dual thruster utilize Tecnadyne “high-efficiency, lightweight brushless thrusters with a ducted KORT Nozzle propeller”, except the DPD-XT obviously employs two th...
6751946 Ducted fan integrated power plant unit having propeller with central blade wheel 2004-06-22 Li 60/269 5562419 Shrouded fan blisk 1996-10-08 Crall et al. 416/190 5261227 Variable specific thrust turbofan engine 1993-11-16 Giffin, III 60/226.1 5114100 Anti-icing system for aircraft 1992...
2929580Aircraft for vertical or short takeoff, and integrated propulsion lifting and propeller slip stream deflecting unit therefor1960-03-22Ciolkosz244/12.5 Primary Examiner: DIXON, KEITH L Attorney, Agent or Firm: HONEYWELL/S&S Claims: I claim: ...
At the same rotation speed in the air, the thrust of the propeller system decreases and the required power increases. With an increase in the height of the propeller above the water surface, the thrust and power return to normal. Furthermore, a numerical model was proposed to express the ...
Motivated by a bioinspired optimal aerodynamic design of a multi-propeller configuration, here we propose a ducted multi-propeller design to explore the improvement of lift force production and FM efficiency in quadrotor drones through optimizing the ducted multi-propeller configuration. We first conducted...
Turbulent rotational flow on the propeller blades may occur in descent and cause a vortex-ring state, which causes unsteady shifting of the flow along the blade span and may lead to roughness and loss of aircraft control. The last approach to VTOL aircraft is the use of a ducted lift fan ...
Turbulent rotational flow on the propeller blades may occur in descent and cause a vortex-ring state, which causes unsteady shifting of the flow along the blade span and may lead to roughness and loss of aircraft control. The last approach to VTOL aircraft is the use of a ducted lift fan ...
Turbulent rotational flow on the propeller blades may occur in descent and cause a vortex-ring state, which causes unsteady shifting of the flow along the blade span and may lead to roughness and loss of aircraft control. The last approach to VTOL aircraft is the use of a ducted lift fan ...