Results 101 to 110 of about 10,178 (235)

A Soviet quasi-market for inventions : jet propulsion, 1932–1946 [PDF]

open access: yes
This paper is about how a command system allocated resources under profound uncertainty. The command system was the Soviet economy, the period was Stalin's dictatorship, and the resources were designated for military research & development.
Harrison, Mark
core   +1 more source

The influence of dynamic factors on the characteristics of the aviation engine in operating modes

open access: yesАвіаційно-космічна техніка та технологія
In the range of different flow modes for selecting the dimensions of the flow part, the rotor rotation frequency, and the design of compressors and turbines, the highest tension values for the strength were considered.
Serhii Tovkach
doaj   +1 more source

A turbojet simulator for Mach numbers up to 2.0 [PDF]

open access: yes
A turbojet simulator was designed and fabricated for use in wind tunnel models. The simulator contains a six-stage, axial-flow compressor powered by a three-stage, axial-flow turbine. High pressure heated air was used to drive the turbine.
Nosek, S. M.   +3 more
core   +1 more source

Assessment of a regulatory measurement system for the determination of the non-volatile particulate matter emissions from commercial aircraft engines. [PDF]

open access: yesJ Aerosol Sci, 2021
Kinsey JS   +27 more
europepmc   +1 more source

Environmental and High-Strain Rate effects on composites for engine applications [PDF]

open access: yes
The Lewis Research Center is conducting a series of programs intended to investigate and develop the application of composite materials to structural components for turbojet engines.
Chamis, C. C., Smith, G. T.
core   +1 more source

The design and performance estimates for the propulsion module for the booster of a TSTO vehicle [PDF]

open access: yes
A NASA study of the propulsion systems for possible low-risk replacements for the Space Shuttle is presented. Results of preliminary studies to define the USAF two-stage-to-orbit (TSTO) concept to deliver 10,000 pounds to low polar orbit are described ...
Maldonado, Jaime J.   +1 more
core   +1 more source

Optimization and guidance of flight trajectories for the national aerospace plane [PDF]

open access: yes
The research on optimal trajectories for the National Aerospace Plane (NASP) performed by the Aero-Astronautics Group of Rice University from June 22, 1989 to December 31, 1990 is summarized.
Miele, Angelo
core   +1 more source

Emission calibration of a J-58 afterburning turbojet engine at simulated supersonic stratospheric flight conditions [PDF]

open access: yes
Emissions of total oxides of nitrogen, unburned hydrocarbons, and carbon monoxide from a J-58 engine at simulated flight conditions of Mach 2.0, 2.4, and 2.8 at 19.8 km altitude are reported.
Holdeman, J. D.
core   +1 more source

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