Investigation into the hovering flight dynamics and control of a flapping wing micro air vehicle [PDF]
, 2003 The hovering flight of a micro air vehicle was investigated. Various flight control concepts, inspired by observation of insect and bird flight, were investigated in some detail. The concepts make use of flap frequency or phase between the flap and pitch
Loh, K.
core +7 more sources
Advances in understanding autogyro flight dynamics [PDF]
, 2008 A comprehensive flight dynamics study of the autogyro is presented in this paper. A state of the art generic simulation of the vehicle type was developed and validated against flight data.
Thomson, D.G., Houston, S.
core +8 more sources
Helicopter tail rotor thrust and main rotor wake coupling in crosswind flight [PDF]
, 2010 The tail rotor of a helicopter with a single main rotor configuration can experience a significant reduction in thrust when the aircraft operates in crosswind flight. Brown’s vorticity transport model has been used to simulate a main rotor and tail rotor
Fletcher, Timothy M. +3 more
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A comparison of coaxial and conventional rotor performance [PDF]
, 2009 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, R.E. +3 more
core +4 more sources
Applied Sciences, 2023 The aerodynamic interaction between the rotor and fuselage is an important consideration in relation to the drag performance prediction of helicopters. In this paper, based on dynamic patched-grid technology coupled with a three-dimensional N–S equation ...
Wenbo Shi, Heng Zhang, Yuanxiang Li
doaj +1 more source
Comparative Study of Coaxial Main Rotor Aerodynamics at Forward Flight Based on Free Wake Model and Unsteady ReynoldsAveraged Navier–Stokes Method [PDF]
Journal of Aerospace Technology and Management, 2022 This paper is dedicated to the numerical modeling of the aerodynamic characteristics of the full-scale coaxial main rotor. The modes of forward flight in the range of values V = 30−60 m∙s–1 (108−216 km∙h–1) have been under consideration.
Sergey Gennadievich Konstantinov +4 more
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Kinematics Measurement and Power Requirements of Fruitflies at Various Flight Speeds
Energies, 2020 Energy expenditure is a critical characteristic in evaluating the flight performance of flying insects. To investigate how the energy cost of small-sized insects varies with flight speed, we measured the detailed wing and body kinematics in the full ...
Hao Jie Zhu, Mao Sun
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A Resilient Forward-Looking Terrain Avoidance Warning Method for Helicopters
Aerospace, 2022 To reduce nuisance alarms caused by a fixed forward-looking boundary, this paper proposes a resilient forward-looking terrain avoidance method. The method constructed the resilient and adjustable forward-looking boundary model by using roll angle and ...
Rui Chen, Long Zhao
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Numerical Study on Tandem-Rotor Autorotation in Forward Flight
Aerospace, 2022 This work presents a systematic approach to analyzing the aerodynamic characteristics of tandem rotor forward autorotation considering rotor-to-rotor interference.
Jiayu Wen +3 more
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Flight dynamic simulation of helicopter forward flight through microburst wind field
Advances in Mechanical Engineering, 2017 A nonlinear dynamic model of a helicopter flying through a variable microburst wind field is developed. Equivalent wind field models are established based on the Soesman and gust models to analyze quantitatively the abrupt change when a helicopter enters
Tong Liu, Yuting Dai, Guanxin Hong
doaj +1 more source