Results 211 to 220 of about 9,883 (263)

The future of aircraft propulsion

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2000
The next century offers many challenges to the aero-engine industry in both the civil and the military markets. The primary driver in both markets will be to reduce the cost of acquiring, operating and supporting the product throughout its life.
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Trends in Aircraft Propulsion

The Journal of the Royal Aeronautical Society, 1961
The 1,186th Lecture to be given before the Society—and the 40th Main Lecture to be held at a Branch centre—“ Trends in Aircraft Propulsion” by H. Pearson, B.A., F.R.Ae.S., Chief Engineer (Performance & Research), Rolls-Royce Ltd., was given under the auspices of the Southampton Branch on 19th January 1961. Professor A. R.
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Jet propulsion for quiet aircraft

The Journal of the Acoustical Society of America, 1974
A novel method of jet noise reduction has been subjected to bench and wind tunnel tests. This patented method uses very small nozzles arranged on struts protuding from the upper surface of an aircraft wing. Bench tests included various arrangements of nozzles on each strut; tests with heated air; tests of noise power and directivity versus number of ...
F. Bert Bossler, D. L. Smith
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Hybrid-Electric Propulsion for Aircraft

Journal of Aircraft, 2015
Against a background of increasing energy demand and rising fuel prices, hybrid-electric propulsion systems have the potential to significantly reduce fuel consumption in the aviation industry, particularly in the lighter sectors. By taking advantage of both electric motor and internal combustion engine, hybrid-electric propulsion systems provide not ...
C. Friedrich, P.A. Robertson
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Propulsion System Modeling for a Multi-Aircraft Simulator [PDF]

AIAA Modeling and Simulation Technologies (MST) Conference, 2013
A procedure for high accuracy propulsion modeling in a multi-aircraft simulator environment is described. The procedure consists in obtaining engine characteristics from a small set of available data and processing them off-line to obtain different engine maps. Each aircraft engine, mainly turbofan or turboprop, is modeled with a different architecture
CASSARO, MARIO, GUNETTI, PAOLO GIOVANNI MICHELE, BATTIPEDE, Manuela, GILI, Piero   +3 more
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Trends in Military Aircraft Propulsion

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 1989
The major factors determining the choice of engine cycle for a combat aircraft are the requirements of the design mission and those of aircraft speed and agility. The requirement for jet-borne flight in short take-off vertical landing (STOVL) aircraft imposes further demands on cycle and configuration.
R M Denning, N A Mitchell
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ATOMIC POWER And Aircraft Propulsion

SAE Technical Paper Series, 1949
<div class="htmlview paragraph"><b>A</b>FTER outlining the fundamental physical background for the release of atomic energy, the author shows that the high concentration of energy and the high cost and relative scarcity of atomic fuels mark them for use where there is a high premium on performance, rather than on direct cost per unit ...
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Propulsion Integration for Military Aircraft

SAE Technical Paper Series, 1989
<div class="section abstract"><div class="htmlview paragraph">ABSTRACT</div><div class="htmlview paragraph">The transonic aerodynamic characteristics for high-performance aircraft are significantly affected by shock induced flow interactions as well as other local flow interference effects which usually occur at transonic speeds.
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The challenges and potential benefits of electrified propulsion for aircraft

2022
This work presents a study of the potential benefits and limitations of electric propulsion for aircraft. Components such as chemical batteries, electrical machines and power electronics benefit from high power conversion efficiencies and high specific powers (power conversion capability per unit weight).
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Cycloidal Propulsion Applied to Aircraft

Transactions of the American Society of Mechanical Engineers, 1928
Abstract After reporting observations on the flight of gulls which indicated that the wing top moves with a cycloidal motion, the author proceeds to an analysis of this type of motion as it might be applied to the propulsion of aircraft.
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