Results 111 to 120 of about 1,536 (172)

Advanced General Aviation Turbine Engine (GATE) concepts [PDF]

open access: yes
Concepts are discussed that project turbine engine cost savings through use of geometrically constrained components designed for low rotational speeds and low stress to permit manufacturing economies.
Lays, E. J., Murray, G. L.
core   +1 more source

Helicopter Turboshaft Engine Emission Estimation Based on Standard Flight Profile [PDF]

open access: yesChallenges to national defence in contemporary geopolitical situation, 2020
József TÓTH   +2 more
openaire   +1 more source

Automated Power Assessment for Helicopter Turboshaft Engines [PDF]

open access: yes
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.
core   +1 more source

A review of NASA's propulsion programs for aviation [PDF]

open access: yes
A review of five NASA engine-oriented propulsion programs of major importance to civil aviation are presented and discussed. Included are programs directed at exploring propulsion system concepts for (1) energy conservation subsonic aircraft (improved ...
Johnson, H. W.   +2 more
core   +1 more source

Propulsion System Models for Rotorcraft Conceptual Design [PDF]

open access: yes
The conceptual design code NDARC (NASA Design and Analysis of Rotorcraft) was initially implemented to model conventional rotorcraft propulsion systems, consisting of turboshaft engines burning jet fuel, connected to one or more rotors through a ...
Johnson, Wayne
core   +1 more source

Fuel conservation merits of advanced turboprop transport aircraft [PDF]

open access: yes
The advantages of a propfan powered aircraft for the commercial air transportation system were assessed by the comparison with an equivalent turbofan transport.
Revell, J. D., Tullis, R. H.
core   +1 more source

Multipoint Design and Optimization of a Turboshaft Engine for a Tiltwing Turboelectric Vertical Takeoff Landing Air Taxi [PDF]

open access: yes
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.
core   +1 more source

Effects of helicopter transport on red blood cell components. [PDF]

open access: yesBlood Transfus, 2012
Otani T   +7 more
europepmc   +1 more source

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