Results 21 to 30 of about 232,137 (308)
Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016 The paper deals with the non-contact method of monitoring the integrity of the main rotor blades of a helicopter. The available methods of monitoring the integrity of the main rotor blades of the helicopter are labor-intensive to implement, their ...
A. I. Danilin, S. V. Zhukov, M. S. Popov
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Rotor Flux Controller for Induction Machines Considering Main Inductance Saturation [PDF]
Problems of the Regional Energetics, 2020 This paper discusses the problem of controlling electromechanical systems with maximum per-formance while maintaining accuracy and minimum power consumption.
Diachenko G.
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Известия высших учебных заведений России: Радиоэлектроника, 2019 Introduction. The basis for solving the problem of aircraft recognition is the formation of radar portraits, reflecting the constructive features of aerial vehicles.
Sergey R. Heister, Thai T. Nguyn
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International Journal of Aerospace Engineering, 2020 The tail rotor of a helicopter operating under low-speed crosswind undergoes highly complex flow due to the interaction between the main rotor, fuselage, and tail rotor system.
Nahyeon Roh, Sejong Oh, Donghun Park
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Helicopter main rotor blade injury to the head with survival [PDF]
Journal of the Royal Army Medical Corps, 1997 A case of soldier surviving a major helicopter rotor blade injury occurring in daylight is described and the limited literature on the subject is discussed.
J R, Gibbons +3 more
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Exploring the Detached-Eddy Simulation for Main Rotor Flows [PDF]
Russian Aeronautics, 2018 This paper applies the Detached-Eddy Simulation (DES) method to resolve a larger part of the flow spectrum around rotor blades in hover and forward flight. A comparison between DES and Unsteady Reynolds–Averaged Navier–Stokes simulation was carried out for the case of a forward flying rotor suggesting that DES has great potential for rotor applications.
Dehaeze, F. +4 more
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Helicopter Safe Landing Trajectory after Main Rotor Actuator Failures
Applied Sciences, 2020 Main rotor actuator failure leads to catastrophic accidents for single main rotor helicopters. This paper focuses on safe landing trajectories after an actuator is locked in place by the remaining actuators, without introducing other control inputs.
Yunjie Wang +3 more
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Thrust pulsation of coaxial main rotor, caused by the blades relative position
Научный вестник МГТУ ГА, 2020 The influence of reciprocal position of the upper rotor blades in respect to the lower rotor blades is characteristic for coaxial main rotor. It is established that the initial azimuth of the blade, for example, of the upper rotor’s which does not ...
B. S. Kritsky +3 more
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Investigation of the rotor–obstacle aerodynamic interaction in hovering flight [PDF]
, 2018 In this paper, a comprehensive experimental survey of the aerodynamic interaction of a hovering rotor in the proximity of a ground obstacle is described, taking advantage of multiple experimental techniques.
Giuni, Michea +2 more
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Design of Composite Gyrocopter Main Rotor Blade Involving Rib and Spar Elements [PDF]
Journal of Engineering, Project, and Production Management, 2019 Gyrocopter or gyroplane is a type of rotorcraft that uses an unpowered main rotor in free autorotation to develop lift. Gyrocopter rotor blades have smaller cord length and longer span compared to helicopters blades.
Yonas Mitik Degu, Derbew Alebel
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