Results 211 to 220 of about 44,118 (256)

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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The Engineering Reliability of Shaft-Driven Helicopters

The Journal of the Royal Aeronautical Society, 1963
I am honoured to have been invited to give this Third Cierva Memorial Lecture on a subject which has a general application to all forms of aircraft, and which is central to any consideration of the future of the helicopter.Reliability is a problem, the extent and urgency of which can only be appreciated fully and at first hand by the operator of a ...
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COOLING DATA FOR TURBINE ENGINES IN HELICOPTERS

2017
<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 Review of Engineering Developments in Helicopter Design

The Aeronautical Journal, 1969
One of the most interesting aspects of the aeronautical endeavours of Henson and Stringfellow was their awareness of the impact of the aeroplane as part of an overall transport system. It is all too easy in the field of aeronautical engineering to become mesmerised by the engineering intricacies of what one is doing and so fail to see the vehicle as ...
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A World Of Applications For Helicopter Electromagnetics To Environmental And Engineering Problems

12th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1999
The variety of environmental and engineering applications for helicopter-borne electromagnetic surveys has increased in recent years. Helicopter EM surveys undertaken by Geoterrex-Dighem have been used for: l measuring soil conductivity near oil pipelines to assess corrosion risk, l estimating soil type and depth for pipeline planning, l mapping sand ...
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Rethinking the Paper Helicopter

The American Statistician, 2005
Box's paper helicopter has been used to teach experimental design for more than a decade. It is simple, inexpensive, and provides real data for an involved, multifactor experiment. Unfortunately it can also further an all-too-common practice that Professor Box himself has repeatedly cautioned against, namely ignoring the fundamental science while ...
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Helicopter Engine/Airframe Interface Document and Checklist

2022
<div class="section abstract"> <div class="htmlview paragraph">This SAE Aerospace Recommended Practice (ARP) provides a guide for the preparation of a helicopter engine/airframe interface document and checklist. This document and checklist should identify the information needed by the engine manufacturer and the aircraft manufacturer to ...
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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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THE RECIPROCATING ENGINE IN THE HELICOPTER

SAE Technical Paper Series, 1953
J. J. SHIELDS, J. T. BOWLING
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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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