Results 21 to 30 of about 54,340 (264)
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
doaj +1 more source
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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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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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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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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FEBS Open Bio, EarlyView.Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty +13 more
wiley +1 more source
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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Protocol for quantifying miRNA trafficking across the endosomal membrane
FEBS Open Bio, EarlyView.An in vitro protocol measures miRNA uptake into endosomes isolated from mammalian cell extracts, which are free of subcellular contaminants. Performed at 37 °C in the presence of ATP, it ensures the import of single‐stranded miRNA into the endosomal lumen.
Syamantak Ghosh +2 more
wiley +1 more source
Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading
Advanced Engineering Materials, EarlyView.The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley +1 more source