Results 61 to 70 of about 1,267 (185)

RESULTS OF THE FIRST MI-171A2 FLYING LABORATORY TEST PHASE

Научный вестник МГТУ ГА, 2016
The present publication describes the results of the first stage of the flying laboratory (Mi-171 helicopter) flight tests performed at Mil Moscow Helicopter Plant, JSC facilities. Main rotor components with blades made of polymer composite materials and
V. A. Ivchin, K. Y. Samsonov
doaj  

Numerical investigation of rotor loads of a shipborne coaxial-rotor helicopter during a vertical landing based on moving overset mesh method

Engineering Applications of Computational Fluid Mechanics, 2019
Coupled ship/coaxial-rotor simulations have been conducted to investigate the rotor loads of a shipborne coaxial-rotor helicopter during a vertical landing based on Reynolds-averaged Navier-Stokes (RANS) solver.
Dacheng Su, Guohua Xu, Shuilin Huang, Yongjie Shi   +3 more
doaj   +1 more source

Sand Erosion Resistance and Failure Mechanism of Polyurethane Film on Helicopter Rotor Blades. [PDF]

Polymers (Basel), 2023
Zheng L, Fan J, Gong Q, Sun W, Jia X.
europepmc   +1 more source

Lifting and Transport of Martian Dust by the Ingenuity Helicopter Rotor Downwash as Observed by High-Speed Imaging From the Perseverance Rover. [PDF]

J Geophys Res Planets, 2022
Lemmon MT, Lorenz RD, Rabinovitch J, Newman CE, Williams NR, Sullivan R, Golombek MP, Bell JF, Maki JN, Vicente-Retortillo A.   +9 more
europepmc   +1 more source

Hysteresis Compensation for a Piezoelectric Actuator of Active Helicopter Rotor Using Compound Control. [PDF]

Micromachines (Basel), 2021
Zhou J, Dong L, Yang W.
europepmc   +1 more source

A Case of Penetrating Head Wound Due to Helicopter Rotor Blade Injury in a 34-Year-Old Naval Helicopter Pilot Who Returned to Active Service 5 Years Later. [PDF]

Am J Case Rep, 2021
Hsieh CC, Chan PY, Liou LR, Chen YK, Tsao MJ, Chen LF, Lin KH.   +6 more
europepmc   +1 more source

CALCULATED RESEARCH OF INFLUENCE OF HELICOPTER MAIN ROTORS GEOMETRY ON THE EFFICIENCY IN HOVER MODE BASED ON THE NONLINEAR VORTEX MODEL

Научный вестник МГТУ ГА, 2018
The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin, P. V. Makeev, A. I. Shomov   +2 more
doaj   +1 more source

Design of Unmanned Helicopter Distributed Electric Tail Rotor Controller Based on Improved Active Disturbance Rejection Control

IEEE Access
In response to the critical implications of single tail rotor failures in unmanned helicopters, this study proposes a distributed electric tail rotor yaw channel controller that employs Active Disturbance Rejection Control (ADRC) techniques.
Qing-Xin Zhang, Yun-Feng Ji, Feng Wang, Lei Pei, Zheng-Ming Cha   +4 more
doaj   +1 more source

Study on dynamic characteristics of the helicopter main transmission system

Jixie chuandong
ObjectiveTo identify the main excitation frequencies that cause the vibration of the helicopter main transmission system and reveal the influence of system speed, rotor torque, and rotor lift on the dynamic characteristics of the helicopter main ...
XU Huachao, XU Zhiliang, WANG Yong, FAN Mengyang, YANG Longze, LIAO Hongjun   +5 more
doaj  

Research of the crosswind effect on the single-rotor helicopter unintentional yaw rotation

Научный вестник МГТУ ГА
During the operation of single-rotor helicopters, aviation accidents quite frequently occur in the form of an unintentional turn or even a yaw rotation, causing, as a rule, a ground collision.
V. V. Efimov, V. A. Ivchin, K. O. Chernigin   +2 more
doaj   +1 more source