A summary of rotor-hub bending moments encountered by a high performance hingeless- rotor helicopter during nap-of-the-earth maneuvers [PDF]
Rotor-hub bending moment measurements on hingeless rotor helicopter during abrupt maneuvers near ...
Snyder, W. J.
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Hover and forward flight acoustics and performance of a small-scale helicopter rotor system [PDF]
A 2.1-m diam., 1/6-scale model helicopter main rotor was tested in hover in the test section of the NASA Ames 40- by 80- Foot Wind Tunnel. Subsequently, it was tested in forward flight in the Ames 7- by 10-Foot Wind Tunnel.
Kitaplioglu, C., Shinoda, P.
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Forces on Obstacles in Rotor Wake – A GARTEUR Action Group [PDF]
, 2017 The paper describes the objectives and the structure of the GARTEUR Action Group HC/AG-22 project which deals with the basic research about the forces acting on obstacles when immersed in rotor wakes.
Bakker, Richard +13 more
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Rotor performance characteristics from an aeroacoustic helicopter wind-tunnel test program [PDF]
An investigation of helicopter rotor noise at model scale was conducted in the Langley 4 by 7 meter tunnel. The program described was the first of a planned three-phase project whose purpose was to examine the characteristic noise mechanism involved in ...
Elliott, J. W., Hoad, D. R., Orie, N. M.
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The effects of nonuniform swash-plate stiffness on coupled blade-control system dynamics and stability. Part 2 - Computer program listing [PDF]
Computer program for calculating effects of swash-plate stiffness on helicopter rotor system dynamics and ...
Piarulli, V. J.
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PRESSURE THEORY OF HELICOPTER ROTOR
Advanced Engineering Research, 2011 A new theory of determining the principal aerodynamic characteristics of the propeller is offered.
openaire +2 more sources
An exploratory investigation of the flight dynamics effects of rotor rpm variations and rotor state feedback in hover [PDF]
This paper presents the results of an analytical study conducted to investigate airframe/engine interface dynamics, and the influence of rotor speed variations on the flight dynamics of the helicopter in hover, and to explore the potential benefits of ...
Chen, Robert T. N.
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An investigation of rotor harmonic noise by the use of small scale wind tunnel models [PDF]
Noise measurements of small scale helicopter rotor models were compared with noise measurements of full scale helicopters to determine what information about the full scale helicopters could be derived from noise measurements of small scale helicopter ...
Schaffer, E. G., Sternfeld, H., Jr.
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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
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A laboratory study of the subjective response to helicopter blade-slap noise [PDF]
The test stimuli recorded during a recent field study consisted of 16 sounds, each presented at 4 peak noise levels. Two helicopters and a fixed-wing aircraft were used.
Shepherd, K. P.
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