Results 81 to 90 of about 11,647 (229)

Ascent trajectory optimisation for a single-stage-to-orbit vehicle with hybrid propulsion [PDF]

open access: yes, 2012
This paper addresses the design of ascent trajectories for a hybrid-engine, high performance, unmanned, single-stage-to-orbit vehicle for payload deployment into low Earth orbit. A hybrid optimisation technique that couples a population-based, stochastic
Brown, Richard   +4 more
core   +1 more source

HYBRID ROCKET ENGINE TEST FACILITY DESIGN

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2016
Hybrid rocket engines is relatively less researched subject of chemical rockets. Using fuel and oxidizer in different phases hybrids are safe and cheap. Yet, they are not generating enogh thrust to deliver heavy payloads to edge of space.
Ali Emre Samur   +2 more
doaj  

Next generation earth-to-orbit space transportation systems: Unmanned vehicles and liquid/hybrid boosters [PDF]

open access: yes
The United States civil space effort when viewed from a launch vehicle perspective tends to categorize into pre-Shuttle and Shuttle eras. The pre-Shuttle era consisted of expendable launch vehicles where a broad set of capabilities were matured in a ...
Hueter, Uwe
core   +1 more source

Experimental Investigation on a Throttleable Pintle-Centrifugal Injector

open access: yesApplied Sciences
This paper presents the design and experimental evaluation of a throttleable pintle-centrifugal injector system tailored for hybrid rocket engines, aimed at improving combustion efficiency and enabling precise throttling control.
Tianwen Li   +3 more
doaj   +1 more source

A theoretical study on throttle ranges of O/F controllable hybrid rocket propulsion systems

open access: yesJournal of Fluid Science and Technology, 2018
The characteristics of several O/F control methods for hybrid rocket propulsion have been discussed and theoretically analyzed from the physical properties of propellants and fuel regression behavior.
Kohei OZAWA, Toru SHIMADA
doaj   +1 more source

Design issues for lunar in situ aluminum/oxygen propellant rocket engines [PDF]

open access: yes
Design issues for lunar ascent and lunar descent rocket engines fueled by aluminum/oxygen propellant produced in situ at the lunar surface were evaluated.
Meyer, Michael L.
core   +1 more source

Status Update Report for the Peregrine 100km Sounding Rocket Project [PDF]

open access: yes, 2008
The Peregrine Sounding Rocket Program is a joint basic research program of NASA Ames Research Center, NASA Wallops, Stanford University and the Space Propulsion Group, Inc. (SPG). The goal is to determine the applicability of liquifying hybrid technology
Cantwell, Brian   +7 more
core   +1 more source

From Earth to Orbit: An assessment of transportation options [PDF]

open access: yes
The report assesses the requirements, benefits, technological feasibility, and roles of Earth-to-Orbit transportation systems and options that could be developed in support of future national space programs.
Blond, Edmund   +9 more
core   +1 more source

Innovative Methods to Enhance the Combustion Properties of Solid Fuels for Hybrid Rocket Propulsion

open access: yesAerospace, 2019
The low regression rates for hydroxyl-terminated polybutadiene (HTPB)-based solid fuels and poor mechanical properties for the alternative paraffin-based liquefying fuels make today hybrid rocket engines far from the outstanding accomplishments of solid ...
Suhang Chen   +6 more
doaj   +1 more source

A Unique Hybrid Propulsion System Design for Large Space Boosters [PDF]

open access: yes
A study was made of the application of hybrid rocket propulsion technology to large space boosters. Safety, reliability, cost, and performance comprised the evaluation criteria, in order of relative importance, for this study.
Rodgers, Frederick C.
core   +1 more source

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