Effect of rotor stiffness and lift offset on the aeroacoustics of a coaxial rotor in level flight [PDF]
, 2009 The acoustic characteristics of a twin contra-rotating coaxial rotor configuration with significant flapwise stiffness are investigated in steady forward flight.
Brown, Richard +2 more
core
A Dynamic RCS and Noise Prediction and Reduction Method of Coaxial Tilt-Rotor Aircraft Based on Phase Modulation. [PDF]
Sensors (Basel), 2022 Wang Z, Huang J, Yi M, Lu S.
europepmc +1 more source
Experimental and numerical investigation on a trimaran airwake, geometry modification. [PDF]
Heliyon, 2023 Vakilabadi KA, Ghafari HR, Ghassemi H.
europepmc +1 more source
Helicopter rotor wake geometry and its influence in forward flight. Volume 1: Generalized wake geometry and wake effect on rotor airloads and performance [PDF]
An analytic investigation to generalize wake geometry of a helicopter rotor in steady level forward flight and to demonstrate the influence of wake deformation in the prediction of rotor airloads and performance is described.
Egolf, T. A., Landgrebe, A. J.
core +1 more source
Modeling and Robust Tracking Decoupling Control of a Coaxial Unmanned Helicopter Based on the Improved Alternating Direction Method of Multipliers. [PDF]
Comput Intell Neurosci, 2022 Xu A, Wang F, Chen M.
europepmc +1 more source
Design and preliminary tests of a blade tip air mass injection system for vortex modification and possible noise reduction on a full-scale helicopter rotor [PDF]
Full-scale tests were conducted on the Langley helicopter rotor test facility as part of a study to evaluate the effectiveness of a turbulent blade tip air mass injection system in alleviating the impulsive noise (blade slap) caused by blade-vortex ...
Balcerak, J. C. +3 more
core +1 more source
Research on Attitude Detection and Flight Experiment of Coaxial Twin-Rotor UAV. [PDF]
Sensors (Basel), 2022 You D, Hao Y, Xu J, Yang L.
europepmc +1 more source
Co-design Optimization of a Novel Multi-identity Drone Helicopter (MICOPTER). [PDF]
J Intell Robot Syst, 2022 Abedini A, Bataleblu AA, Roshanian J.
europepmc +1 more source
Application of Artificial Neural Networks to a Model of a Helicopter Rotor Blade for Damage Identification in Realistic Load Conditions. [PDF]
Sensors (Basel)Ballarin P +5 more
europepmc +1 more source
Experimental and Numerical Analysis of Chlorinated Polyethylene Honeycomb Mechanical Performance as Opposed to an Aluminum Alloy Design. [PDF]
Materials (Basel), 2022 Baciu F +4 more
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