Design of mold for helicopter composite rotor blade [PDF]
, 2006 This paper shows CAD/CAM programming technique of mold recess for helicopter main rotor blade. It is necessary to achieve high precision in this process. Due to the dimensions along one of the blade axis, the segmented mold is found necessary. In this paper the programming procedure is shown for one of these mold segments.
Simonović, Aleksandar +1 more
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Surface pressure measurements at two tips of a model helicopter rotor in hover [PDF]
Surface pressures were measured near the tip of a hovering single-bladed model helicopter rotor with two tip shapes. The rotor had a constant-chord, untwisted blade with a square, flat tip which could be modified to a body-of-revolution tip.
Gray, R. B. +3 more
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Rotor-vortex interaction noise [PDF]
A theoretical and experimental study was conducted to develop a validated first principles analysis for predicting noise generated by helicopter main-rotor shed vortices interacting with the tail rotor.
Amiet, R. K., Schlinker, R. H.
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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
Helicopter rotor trailing edge noise [PDF]
A two dimensional section of a helicopter main rotor blade was tested in an acoustic wind tunnel at close to full-scale Reynolds numbers to obtain boundary layer data and acoustic data for use in developing an acoustic scaling law and testing a first ...
Amier, R. K., Schlinker, R. H.
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Manoeuvrability assessment of a hybrid compound helicopter configuration [PDF]
, 2014 The compound helicopter design could potentially satisfy the new emerging requirements placed on the next generation of rotorcraft. The main benefit of the compound helicopter is its ability to reach speeds that significantly surpass the conventional ...
Ferguson, Kevin, Thomson, Douglas
core
A Single Oscillator-Excited Piezoelectric Actuator with Internal Contact Teeth. [PDF]
Micromachines (Basel), 2023 Fang D +7 more
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Investigation of a Compound Helicopter Flying the Depart and Abort Mission Task Element [PDF]
, 2017 The next generation of rotorcraft will have to satisfy the appropriate handling qualities requirements before entering service. Many of these vehicles will operate at significantly greater speeds than the conventional helicopter and will therefore have
Anderson, Dave +2 more
core
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 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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