Results 211 to 220 of about 3,568 (253)

Turboshaft Engine Altitude Testing for Army Qualification

Proceedings of the Vertical Flight Society 75th Annual Forum, 2019
The altitude qualification test is one of the key test activities during the Army's Engineering & Manufacturing Development program that must be successfully completed by test in order to complete engine qualification. It is also one of the most expensive tests that must be performed during Qualification Testing, putting it under ...
Richard Wayne, George Bobula, Charles Watwood   +2 more
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Shaft Engines Turboprop, Turboshaft, and Propfan

2016
This chapter handles shaft-based aero engines. In Chap. 4 piston engines were analyzed while this chapter completes the family tree of shaft engines. Turboprop, turboshaft, and propfan engines are thoroughly analyzed. This engine family is concerned with output power rather than the thrust force. Thus specific power and powers specific fuel consumption
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TRENDS IN NAVY TURBOPROP/TURBOSHAFT ENGINE DEVELOPMENTS

SAE Technical Paper Series, 1960
<div class="section abstract"><div class="htmlview paragraph">The purpose of this paper is twofold: (1) to show that Naval aviation has continuing requirements for shaft-power turbine engines, and (2) to describe briefly some of the more important aspects of turboprop and turboshaft engines under development to fill these requirements ...
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Active Stabilization of Surge in an Axi-Centrifugal Turboshaft Engine

Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 1999
Active stabilization of surge was implemented on an Allied Signal LTS-101 axi-centrifugal gas producer, reducing the surging mass flow by 1%, for an operating range increase of 11%. Control was achieved using high response sensors in the inlet and diffuser throat, coupled to actuators that injected air near the diffuser throat.
E. B. Nelson, J. D. Paduano, A. H. Epstein   +2 more
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Model-based Engine Health for Turboshaft Engines with Limited Instrumentation

Proceedings of the Vertical Flight Society 75th Annual Forum, 2019
Helicopter health and usage monitoring has lagged large commercial aircraft due to the limited instrumentation and high mission complexity of typical rotorcraft. To counteract these challenges, a model-based framework is introduced to utilize knowledge of engine and aircraft operation to determine (either on-board or off-board) the overall ...
Daniel Cornelius, Scott Hannula
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The T700-GE-700 Turboshaft Engine Program

SAE Technical Paper Series, 1973
<div class="htmlview paragraph">The 1500 SHP T700 Engine is being developed for the U.S. Army UTTAS and AAH Helicopters. Prototype engines have been running well since testing began early in 1973. Qualification is expected in early 1976. Engine history and current details, design features, program milestones and possible future developments are ...
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The Control of Turboshaft Engines in Helicopters

SAE Technical Paper Series, 1965
<div class="htmlview paragraph">Written from the point of view of the helicopter constructor, this paper attempts a comprehensive review of the experience accumulated by airframe, engine, and control systems designers in the United Kingdom in the course of developing a wide variety of first generation turbine engined helicopters.</div> < ...
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Turboshaft Engine Development for Commercial Tiltrotor Aircraft

SAE Technical Paper Series, 1991
<div class="htmlview paragraph">The civil aircraft market frequently employs propulsion systems originally developed and qualified for military aircraft applications. When this occurs, the civil sector benefits greatly from the lessons learned during the military engine development and qualification process.
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INSTRUMENTATION REQUIREMENTS FOR TURBOSHAFT ENGINE PERFORMANCE MEASUREMENTS

2017
<div class="section abstract"> <div class="htmlview paragraph">This SAE Aerospace Recommended Practice (ARP) defines the measurement parameters that may be used by a pilot or operator to monitor the thermodynamic health of a turboshaft engine in a helicopter and the measurement system accuracies desired.</div></div>
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Rotorcraft Turboshaft Engine Idle Power Scheduling

<div class="section abstract"> <div class="htmlview paragraph">The purpose of this SAE Aerospace Information Report (AIR) is to provide rotorcraft and engine designers with a better understanding of turboshaft engine idle power characteristics and objectives to be considered in the design and integration process.
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