Computational Study of NASA's Quadrotor Urban Air Taxi Concept [PDF]
High-fidelity computational fluid dynamics simulations have been carried out in order to analyze NASA's quadrotor urban air taxi concept for urban air mobility, also know as on-demand mobility applications. High-order accurate schemes, dual-time stepping,
Ventura Diaz, Patricia, Yoon, Seokkwan
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Journal of Industrial Design and Engineering Graphics, 2011 The objective of this paper is to analyze the role of helicopter rotor, to classify them by type, and to imagine new types of helicopter rotors that can equip future helicopters.
IONESCU Cristian Andrei
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Pitch-Regulated Control Strategy for Coaxial Drone with Variable Rotor Space Ratio
DronesThis study investigates the impact of rotor spacing on the aerodynamic performance of a coaxialcopter and promotes an innovative regulated control strategy for the coaxial drone. The present research introduces a coaxialcopter with variable rotor spacing,
Zhifang Ke +9 more
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An Exploration of the Performance and Acoustic Characteristics of UAV-Scale Stacked Rotor Configurations [PDF]
As interest grows in rotor- and propeller-driven electric vertical takeoff and landing (eVTOL) aircraft for the Urban Air Mobility market, there is a potential for previously studied concepts to reemerge due to the opportunities afforded by novel ...
Fei, Xiaofan +5 more
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Design and Performance of Lift-Offset Rotorcraft for Short-Haul Missions [PDF]
, 2012 The design and performance of compound helicopters utilizing lift-offset rotors are examined, in the context of short-haul, medium-size civil and military missions.
Johnson, Wayne +2 more
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RATIONALE ARE COAXIAL ROTOR WITH ACTIVE BORER
Литьë и металлургия, 2012 The construction of the executive body passing harvester provides separate rotary drive jumper and internal drill, thus increasing line speeds for milling rock teeth.
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Development of Individual Rotor Mutual Induction (IRMI) Method for Coaxial Counter-Rotating Rotor
Applied SciencesA coaxial counter-rotating rotor (CCRR), which has two rotors rotating in the opposite directions on the same axis, is seen as a promising technology for low-cost floating tidal current/ocean current power generation using single-point mooring, as the ...
Shigeo Yoshida +2 more
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Forward Flight Rotor Performance at Martian Atmospheric Densities and Sensitivity to Low Reynolds Numbers [PDF]
Much effort has been made to enhance exploration on Mars. In addition to a rover and Mars-orbiting satellites, a Mars Helicopter Technology Demonstrator was proposed by the NASA Jet Propulsion Laboratory (JPL) to augment planetary research for the Mars ...
Perez Perez, Brenda NAtalia
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Performance of Advanced Heavy-Lift, High-Speed Rotorcraft Configurations [PDF]
, 2007 The aerodynamic performance of rotorcraft designed for heavy-lift and high-speed cruise is examined. Configurations considered include the tiltrotor, the compound helicopter, and the lift-offset rotor. Design conditions are hover and 250-350 knot cruise,
Acree, C. W., Jr. +2 more
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DETERMINATION OF OPTIMAL AZIMUTH FOR MOUNTING ULTRALIGHT COAXIAL HELICOPTER BLADES
Advanced Engineering Research, 2011 The possibility of reducing vibration of the ultralight coaxial helicopter blades on the through harmonic wave by mounting blades on the optimal azimuth is shown.
Vitaly V. Dudnik, Vladimir A. Kolot
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