Results 171 to 180 of about 15,084 (235)

Nature-Inspired Designs in Wind Energy: A Review. [PDF]

Biomimetics (Basel)
Omidvarnia F, Sarhadi A.
europepmc   +1 more source

Inspection of Floating Offshore Wind Turbines Using Multi-Rotor Unmanned Aerial Vehicles: Literature Review and Trends. [PDF]

Sensors (Basel)
Zhang K, Pakrashi V, Murphy J, Hao G.
europepmc   +1 more source

Uncrewed aerial vehicle with onboard winch system for rapid, cost-effective, and safe oceanographic profiling in hazardous and inaccessible areas. [PDF]

HardwareX
Poulsen E, Rysgaard S, Hansen K, Karlsson NB.   +3 more
europepmc   +1 more source

Optimal blade pitch control for enhanced vertical-axis wind turbine performance. [PDF]

Nat Commun
Le Fouest S, Mulleners K.
europepmc   +1 more source

Ascending with ultrasound: telementored eFAST in flight-a feasibility study. [PDF]

Emerg Radiol
Engelsen PC, Heyerdahl F, Maddali DD, Akhavi MS, Undseth RM, Elle OJ, Brun H.   +6 more
europepmc   +1 more source

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Helicopter rotor blades

The Journal of the Acoustical Society of America, 1993
Flow separation behind the notch region of a swept tip of a helicopter rotor blade is reduced by features of the geometry and aerodynamic characteristics of the notch region itself. In particular it has been found beneficial for a forwardly swept leading edge portion to extend at an angle between 30 degrees and 55 degrees from a reference line parallel
Frederick J. Perry, Alan Brocklehurst
openaire   +1 more source

Design and analysis of helicopter rotor blades

International Journal of Science and Research Archive, 2023
Rotor blades of helicopters must be stiff and strong enough to maintain structural loads within working limits. The rotating cycles change the aerodynamic and structural stresses created by the blade revolution. In this project, you will discover the structural stresses of the blades as well as the vibration frequencies studied using the Ansys ...
null Kolli Ramesh, null Macha Srikanth, null Palanati Swetha   +2 more
openaire   +1 more source

Helicopter Rotor Blade Radar Antenna

Journal of the American Helicopter Society, 1966
The helicopter main rotor blade can be used as a scanning radar antenna. Its large aperture gives a narrow azimuth beam‐width and the natural rotor scanning motion provides a fast scan. It is much lighter than conventional antennas and since it is integral with the rotor blade, it induces no additional drag.
openaire   +1 more source

Apparatus for damping helicopter rotor blade oscillations

The Journal of the Acoustical Society of America, 1990
A major design consideration in helicopters is that of compensating for ssses on blades resulting from air forces during blade revolutions. Spinning rotor blades are severely stressed. To some degree conventional articulated helicopter rotor hubs overcome vibration difficulties, but high maintenance is a problem.
David G. Matuska, Donald L. Ferris
openaire   +1 more source