Results 191 to 200 of about 1,707 (248)

Acceleration Performance of Helicopter Engines

Journal of Engineering for Gas Turbines and Power, 1987
The desirability of good acceleration behavior from helicopter gas turbine engines is discussed in the context of the increasing demand for helicopter maneuverability and safety. Features which result in improved engine handling qualities are discussed and reference is made to some analytical techniques which may be employed to assist in obtaining the ...
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Sustainability Assessment in Piston-Prop Helicopter Engine

2016
About 75% of the world’s energy requirement is provided by fossil fuels, and there are various improvement efforts in all fields to ensure the effective use of available sources, taking into consideration the gradual decrease in fossil fuels. Several approaches are used against the decrease in energy sources including the concept of sustainability ...
Yıldırım, E., Altuntaş, Önder, Hikmet, Karakoç, T., Mahir, Nevin   +3 more
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HELICOPTER ENGINE MOUNTING

2017
<div class="section abstract"> <div class="htmlview paragraph">This Aerospace Information Report (AIR) reviews the requirements to be satisfied by the engine mount systems and provides an outline of some suitable methods. Factors such as drive shaft alignment, engine expansion, mount crashworthiness, vibration isolation, and other effects
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Twin Engine Helicopter Power Requirements

2017
<div class="section abstract"> <div class="htmlview paragraph">This SAE Aerospace Information Report (AIR) defines the power spectrum during normal and emergency operations of a twin engine helicopter and thereby postulates suitable power plant rating structures.
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HELICOPTER TURBINE ENGINE WASH

2017
<div class="section abstract"> <div class="htmlview paragraph">Engines subject to dust, industrial pollution, saltwater contamination or other chemically laden atmosphere (including pesticides and herbicides) lose performance due to deposits of contaminants on surfaces in the aidgas flow path.
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Mechanical Engineering Aspects of Helicopter Design

Proceedings of the Institution of Mechanical Engineers, Part D: Transport Engineering, 1985
The work of the early pioneers which led to the evolution of the current helicopter configurations is briefly reviewed. The major mechanical elements of the helicopter are then identified: the engine, transmission and blades analogous to the engine, transmission and wheels of a road vehicle.
Sir Basil Biackwell, V A B Rogers
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HELICOPTER ENGINE FOREIGN OBJECT DAMAGE

2017
<div class="section abstract"> <div class="htmlview paragraph">The purpose of this SAE Aerospace Information Report is to disseminate qualitative information regarding foreign object damage (FOD) to gas turbine engines used to power helicopters and to discuss methods of preventing FOD.
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Helicopter Engine Connecting Rod Failures

2019
Abstract In a helicopter engine connecting rod, high-cycle, low-stress fatigue fractures in bolts and arms progressed about 75% across the section before the final rupture. Factors involved were insufficient specified preload, inadequate tightening during assembly, and engine overspeed.
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COOLING OF TURBINE ENGINES IN HELICOPTERS

2021
<div class="section abstract"> <div class="htmlview paragraph">A tested method of data presentation and use is described herein. The method shown is a useful guide, to be used with care and to be improved with use.</div></div>
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A Test Plant for Helicopter Engines

The Journal of the Royal Aeronautical Society, 1957
This Note describes the design and construction of a “ Tilting Test Bed ” for helicopter engines for Alvis Ltd., for which some onerous requirements were laid down (Fig. 1). The most important of these were that:—(i)Readings of engine torque and b.h.p.
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