Calculated Dynamic Characteristics of a Soft-Inplane Hingeless Rotor Helicopter [PDF]
Calculated dynamic characteristics of a representative soft-inplane hingeless rotor helicopter are presented. The flight dynamics as a function of speed and gross weight are given. The requirements for accurate analytical modelling of this helicopter are
Johnson, W.
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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
Study for prediction of rotor/wake/fuselage interference, part 1 [PDF]
A method was developed which allows the fully coupled calculation of fuselage and rotor airloads for typical helicopter configurations in forward flight. To do this, an iterative solution is carried out based on a conventional panel representation of the
Clark, D. R., Maskew, B.
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A Quiet Helicopter for Air Taxi Operations [PDF]
NASA is exploring rotorcraft designs for VTOL air taxi operations, also known as urban air mobility (UAM) or on-demand mobility (ODM) applications. Several concept vehicles have been developed, intended to focus and guide NASA research activities in ...
Johnson, Wayne
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A Single Oscillator-Excited Piezoelectric Actuator with Internal Contact Teeth. [PDF]
Micromachines (Basel), 2023 Fang D +7 more
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Aeroacoustic analysis of main rotor and tail rotor interaction [PDF]
, 2008 The increased restrictions placed on helicopter noise levels over recent decades have encouraged manufacturers to better understand tail rotor noise and its aerodynamic sources.
Brown, R.E. +2 more
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Applications of higher harmonic control to hingeless rotor systems [PDF]
A comprehensive analytical formulation was developed to predict the vibratory hub loads of a helicopter rotor system in forward flight. This analysis is used to calculate the optimal higher harmonic control inputs and associated actuator power required ...
Chopra, Inderjit, Nguyen, Khanh
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Integration of dynamic, aerodynamic, and structural optimization of helicopter rotor blades [PDF]
Summarized here is the first six years of research into the integration of structural, dynamic, and aerodynamic considerations in the design-optimization process for rotor blades.
Peters, David A.
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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.
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A computer program for the determination of the acoustic pressure signature of helicopter rotors due to blade thickness [PDF]
A computer program is presented for the determination of the thickness noise of helicopter rotors. The results were obtained in the form of an acoutic pressure time history.
Farassat, F., Mall, G. H.
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