Results 11 to 20 of about 7,858 (154)
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, Brown, Kim, Landgrebe, Newman
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Unsteady loads for coaxial rotors in forward flight computed using a vortex particle method [PDF]
, 2018 Recent advances in coaxial rotor design have shown benefits of this configuration. Nevertheless, issues related to rotor-head drag, aerodynamic performance, wake interference, and vibration should also be considered.
Barakos, George +2 more
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Научный вестник МГТУ ГА, 2018 The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin +2 more
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Axial-Flux Permanent-Magnet Dual-Rotor Generator for a Counter-Rotating Wind Turbine
Energies, 2020 Coaxial counter-rotating propellers have been widely applied in ships and helicopters for improving the propulsion efficiency and offsetting system reactive torques.
Filip Kutt +2 more
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High-Torque-Density Low-Cost Magnetic Gear Utilizing Hybrid Magnets and Advanced Materials [PDF]
, 2019 Two major challenges of existing high-performance magnetic gears are: (i) High content of rare-earth permanent magnets which results in high cost as well as price fluctuation; (ii) Conflict between mechanical and electromagnetic performances, especially ...
Al-Qarni, Ali Hussain +2 more
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Design analysis and construction of energy harvesting coaxial helicopter
Aviation, 2013 With the growing need for technology, the tendency for errors has increased many times, which often results in loss of human lives. Our main aim of this paper is to show the implementation of a coaxial rotor aerial vehicle that can be controlled by a ...
Anvinder Singh, Varun Sharma
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Unmanned Helicopter Type Aircraft for the Pesticides and Fertilizers Application
Сельскохозяйственные машины и технологии, 2020 Digital agricultural production is based on robotic agricultural technologies for the use of pesticides and fertilizers using unmanned aerial systems, which are based on unmanned aerial vehicles for monitoring agricultural land, the pesticides ...
L. A. Marchenko +4 more
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Aluminium Feeds for Reflector for NadirSAR [PDF]
, 2018 With the long term aim of developing a NadirSAR quadrotor UAV system specialized for monitoring broad acre grain fields, a large aperture load bearing antenna to use as the main structural element was sort.
Gray, Derek, Le Kernec, Julien
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A rational approach to comparing the performance of coaxial and conventional rotors [PDF]
, 2009 The merit, in terms of its efficiency and performance, of the twin, contrarotating coaxial rotor configuration over the more conventional single rotor system has long been a point of contention.
Brown, R.E., Kim, Hyo Wan
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Mars Science Helicopter Conceptual Design [PDF]
, 2020 Robotic planetary aerial vehicles increase the range of terrain that can be examined, compared to traditional landers and rovers, and have more near-surface capability than orbiters. Aerial mobility is a promising possibility for planetary exploration as
Balaram, Jayarao +15 more
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