Results 51 to 60 of about 9,291 (187)
Effect of inert propellant injection on Mars ascent vehicle performance [PDF]
A Mars ascent vehicle is limited in performance by the propellant which can be brought from Earth. In some cases the vehicle performance can be improved by injecting inert gas into the engine, if the inert gas is available as an in-situ resource and does
Colvin, James E., Landis, Geoffrey A.
core +1 more source
Centaur Development Flight Scheduled for Launch March 29 [PDF]
, 1966 Atlas centaur launch vehicle test mission ...
core +1 more source
In situ propellant production: Alternatives for Mars exploration [PDF]
Current planning for the Space Exploration Initiative (SEI) recognizes the need for extraterrestrial resources to sustain long-term human presence and to attain some degree of self-sufficiency.
Cole, Kevin J. +3 more
core +1 more source
AerospaceThe present work demonstrates a comparative study of hydrogen fuel cells and combustion aircraft to investigate the potential of fuel cells as a visionary propulsion system for radically more sustainable medium- to long-range commercial aircraft.
Stanislav Karpuk +2 more
openaire +2 more sources
Space station propulsion: The advanced development program at Lewis [PDF]
A reference configuration was established for the initial operating capability (IOC) station. The reference configuration has assumed hydrazine fueled thrusters as the propulsion system.
Jones, R. E.
core +1 more source
Hydrogen-fueled scramjets: Potential for detailed combustor analysis [PDF]
Combustion research related to hypersonic scramjet (supersonic combustion ramjet) propulsion is discussed from the analytical point of view. Because the fuel is gaseous hydrogen, mixing is single phase and the chemical kinetics are well known; therefore,
Beach, H. L., Jr.
core +1 more source
A survey of processes for producing hydrogen fuel from different sources for automotive-propulsion fuel cells [PDF]
, 1996 Seven common fuels are compared for their utility as hydrogen sources for proton-exchange-membrane fuel cells used in automotive propulsion. Methanol, natural gas, gasoline, diesel fuel, aviation jet fuel, ethanol, and hydrogen are the fuels considered.
openaire +2 more sources
Radiation exposure and performance of multiple burn LEO-GEO orbit transfer trajectories [PDF]
Many potential strategies exist for the transfer of spacecraft from low Earth orbit (LEO) to geosynchronous (GEO) orbit. One strategy has generally been utilized, that being a single impulsive burn at perigee and a GEO insertion burn at apogee.
Gorland, S. H.
core +1 more source
, 1981 The system includes reusable turbojet propelled booster vehicles releasably connected to a reusable rocket powered orbit vehicle. The coupled orbiter-booster combination takes off horizontally and ascends to staging altitude and speed under booster power
Jackson, L. R. +3 more
core +1 more source
Development and use of hydrogen-air torches in an altitude facility [PDF]
A hydrogen-air ignition torch concept that had been used successfully in two rocket engine test facilities to consume excess hydrogen in their exhausters at atmospheric conditions was experimentally evaluated and developed in an altitude test facility at
Huber, Gary T., Lottig, Roy A.
core +1 more source