Automated Power Assessment for Helicopter Turboshaft Engines [PDF]
An accurate indication of available power is required for helicopter mission planning purposes. Available power is currently estimated on U.S. Army Blackhawk helicopters by performing a Maximum Power Check (MPC), a manual procedure performed by ...
Litt, Jonathan S., Simon, Donald L.
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Application of Climate Impact Metrics to Civil Tiltrotor Design [PDF]
, 2013 Multiple metrics are applied to the design of a large civil tiltrotor, integrating minimum cost and minimum environmental impact. The design mission is passenger transport with similar range and capacity to a regional jet.
Johnson, Wayne, Russell, Carl R.
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Rotorcraft convertible engines for the 1980s [PDF]
Two rotorcraft studies were executed. The goal was to identify attractive techniques for implementing convertible powerplants for the ABC, Folded Tilt Rotor, and X-wing type high speed, high-L/D rotorcraft; to determine the DOC and fuel savings benefits ...
Eisenberg, J. D.
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Multipoint Design and Optimization of a Turboshaft Engine for a Tiltwing Turboelectric Vertical Takeoff Landing Air Taxi [PDF]
This paper describes the design of a turboshaft engine for a tiltwing air taxi application. In this case, the tiltwing air taxi is intended to fly a 400 nm mission with up to fifteen passengers.
Chapman, Jeffryes W.
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Open airscrew VTOL concepts [PDF]
The following concepts, based on using open airscrew(s) for VTOL maneuvers, are re-examined in light of current technology: (1) tip-driven helicopters, (2) compound helicopters; and (3) high-speed VTOL aircraft, represented by tiltrotors, tiltwings ...
Stepniewski, W. Z., Tarczynski, T.
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Feasibility of water injection into the turbine coolant to permit gas turbine contingency power for helicopter application [PDF]
A system which would allow a substantially increased output from a turboshaft engine for brief periods in emergency situations with little or no loss of turbine stress rupture life is proposed and studied analytically.
Vanfossen, G. J.
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Design of a Slowed-Rotor Compound Helicopter for Future Joint Service Missions [PDF]
, 2010 A slowed-rotor compound helicopter has been synthesized using the NASA Design and Analysis of Rotorcraft (NDARC) conceptual design software. An overview of the design process and the capabilities of NDARC are presented.
Johnson, Wayne R. +2 more
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Energy Harvesting Technologies for Structural Health Monitoring of Airplane Components-A Review. [PDF]
Sensors (Basel), 2020 Zelenika S +21 more
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Concept Vehicles for VTOL Air Taxi Operations [PDF]
Concept vehicles are presented for air taxi operations, also known as urban air mobility or on-demand mobility applications. Considering the design-space dimensions of payload (passengers and pilot), range, aircraft type, and propulsion system, three ...
Johnson, Wayne +2 more
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Component research for future propulsion systems [PDF]
Factors affecting the helicopter market are reviewed. The trade-offs involving acquisition cost, mission reliability, and life cycle cost are reviewed, including civil and military aspects.
Walker, C. L., Weden, G. J., Zuk, J.
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