Results 171 to 180 of about 19,013 (214)
Large dynamic pitching for lift enhancement during the pull-out manoeuvre of raptors. [PDF]
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Journal of the American Helicopter Society, 2013
A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration ...
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A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration ...
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Aircraft Engineering and Aerospace Technology, 1985
AGAINST the background briefly outlined together with the development of increasingly sophisticated powerplants as well as the research activities conducted into the operational aspects of rotating wing aircraft, it was realised that major benefits could be expected from fully exploiting health monitoring techniques.
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AGAINST the background briefly outlined together with the development of increasingly sophisticated powerplants as well as the research activities conducted into the operational aspects of rotating wing aircraft, it was realised that major benefits could be expected from fully exploiting health monitoring techniques.
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The Journal of the Royal Aeronautical Society, 1966
This brief historical note on British rotorcraft may be likened to the small visible part of a large iceberg and the reasons for it are these.When I was asked to write this note for the Society's Journal I agreed to undertake the task with certain reservations. In the first instance there was very little time in which to do it.
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This brief historical note on British rotorcraft may be likened to the small visible part of a large iceberg and the reasons for it are these.When I was asked to write this note for the Society's Journal I agreed to undertake the task with certain reservations. In the first instance there was very little time in which to do it.
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The Aeronautical Journal, 2003
A few of us, like Tennyson, have the gift of foreseeing the future. (see Fig. I). Another few, like Juan de la Cierva have the gift of delivering the future. They are the innovators.Those who know Tennyson's verse will recall that his vision was of transportation by air of people and freight and also sadly of weapons.
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A few of us, like Tennyson, have the gift of foreseeing the future. (see Fig. I). Another few, like Juan de la Cierva have the gift of delivering the future. They are the innovators.Those who know Tennyson's verse will recall that his vision was of transportation by air of people and freight and also sadly of weapons.
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Aircraft Engineering and Aerospace Technology, 1996
Reports on a recent review of service experience relating to health and usage monitoring of rotorcraft transmission systems. Describes trials of integrated HUMS on military helicopters and an operator's experience using EuroHUMS on Super Puma helicopters. Informs on the vibration monitoring role of integrated HUMS.
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Reports on a recent review of service experience relating to health and usage monitoring of rotorcraft transmission systems. Describes trials of integrated HUMS on military helicopters and an operator's experience using EuroHUMS on Super Puma helicopters. Informs on the vibration monitoring role of integrated HUMS.
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Future Rotorcraft Technologies
SAE Technical Paper Series, 1982<div class="htmlview paragraph">The rapid advancement of vertical lift technology over the past thirty years (less than half the time involved in fixed wing technology advancement) has provided the helicopter the capability of eliminating airports <i>and</i> runways with their lengthy, complicated navigation and approach systems and ...
John F. Zugschwert +2 more
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The Journal of the Acoustical Society of America, 1997
The rotorcraft noise model (RNM) is a multiplatform computer program being developed for NASA-Langley Research Center which calculates sound levels at receiver positions on the ground from helicopter and tiltrotor operations. RNM calculates levels at positions on a uniform grid or a specific defined locations.
Michael J. Lucas, Michael A. Marcolini
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The rotorcraft noise model (RNM) is a multiplatform computer program being developed for NASA-Langley Research Center which calculates sound levels at receiver positions on the ground from helicopter and tiltrotor operations. RNM calculates levels at positions on a uniform grid or a specific defined locations.
Michael J. Lucas, Michael A. Marcolini
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Physics Bulletin, 1971
Noise within the vicinity of many airports is gradually reaching intolerable levels and action is urgently required to prevent a further deterioration of this situation. The introduction of special take off flight paths and noise monitoring near airports has restricted the spread of the 'take off' noise.
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Noise within the vicinity of many airports is gradually reaching intolerable levels and action is urgently required to prevent a further deterioration of this situation. The introduction of special take off flight paths and noise monitoring near airports has restricted the spread of the 'take off' noise.
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Piezoelectric Deicing System for Rotorcraft
Journal of the American Helicopter Society, 2015Deicing using piezoelectric actuators is considered as a potential solution to the development of low-energy ice protection systems for rotorcraft. This type of system activates resonant frequencies of a structure using piezoelectric actuators to generate sufficient stress to break the bond between the ice and the substrate.
Villeneuve, Éric +4 more
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