Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
Get Book Here
Book Description
One rocket motor assembly was successfully fired and extinguished repeatedly in the low-pressure environment of Vertical Test Cell 1-42B at pressure altitudes of 98,000 to 105,000 feet which demonstrated the capability of this design of propulsion system to start-stop on command in the space environment.
Author: John Denker
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Get Book Here
Book Description
One rocket motor assembly was successfully fired and extinguished repeatedly in the low pressure environment of Vertical Test Cell 1-42B which demonstrated the capability of this design of propulsion system to start-stop on command in the space environment. (Author).
Author: John Denker
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
Get Book Here
Book Description
Twelve rocket motor firings were performed to determine propulsion efficiencies of two propellant formulations at high expansion ratios because the rocket exhaust gases produced by different propellant formulations will behave uniquely when expanded to the low pressure of high altitudes and may, therefore, provide varying propulsion efficiencies. These efficiencies may differ from the efficiencies of sea level firings at lower expansion ratios. It is obviously important that the delivered performance of a propellant at high altitude be known for system design calculations. The altitude simulation facility provided pressure altitudes above 100,000 feet, and all motor firings were successful. (Author).
Author: J. A. Suddreth
Publisher:
ISBN:
Category :
Languages : en
Pages : 22
Get Book Here
Book Description
The necessity for experimental verification of rocket-engine performance at altitude or near-space conditions has long been recognized in the aerospace industry. Recent spacecraft rocket-engine research and development trends toward higher area ratios, advanced nozzle concepts, and nonequilibrium flow conside ations have made altitude simulation a requirement of development pro- grams. Recause the need for information regarding the capabilities and char- acteristics of altitude test facilities that are suitable for l%id-rocket%- engine operation was recognized, this survey was compiled with the help of representatives of industry and government agencies;% % INTROPUCTION The advent of upper-stage and spacecraft engine-vehicle development pro- grams along with the need for more rigorous performance and reliability data justified the construction of a number of altitude test facilities. The test capabilities of these facilities range from small attitude-control engines to large upper-stage engines. The altitude-simulating systems include simple diffusers coupled to the engine nozzle exit (fig. 1), steam ejector coupled to the engine-driven diffuser (fig. 2), and pumped environmental chambers coupled to a diffuser or ejector system for use during engine firing (fig. 3). Several techniques for vacuum generation exist. In addition to the conventional sys- tems of mechanical pumps and steam boilers for stem% ejectors, there are semi- portable liquid-propellant-driven steam generators.
Author: Harry E. Bloomer
Publisher:
ISBN:
Category : Rocket engines
Languages : en
Pages : 36
Get Book Here
Book Description
Author: Jack A. Suddreth
Publisher:
ISBN:
Category : Rocket engines
Languages : en
Pages : 10
Get Book Here
Book Description
The necessity for experimental verification of rocket-engine performance at altitude or near-space conditions has long been recognized in the aerospace industry. Recent spacecraft rocket-engine research and development trends toward higher area ratios, advanced nozzle concepts, and nonequilibrium flow conside ations have made altitude simulation a requirement of development pro- grams. Recause the need for information regarding the capabilities and char- acteristics of altitude test facilities that are suitable for l%id-rocket%- engine operation was recognized, this survey was compiled with the help of representatives of industry and government agencies;% % INTROPUCTION The advent of upper-stage and spacecraft engine-vehicle development pro- grams along with the need for more rigorous performance and reliability data justified the construction of a number of altitude test facilities. The test capabilities of these facilities range from small attitude-control engines to large upper-stage engines. The altitude-simulating systems include simple diffusers coupled to the engine nozzle exit (fig. 1), steam ejector coupled to the engine-driven diffuser (fig. 2), and pumped environmental chambers coupled to a diffuser or ejector system for use during engine firing (fig. 3). Several techniques for vacuum generation exist. In addition to the conventional sys- tems of mechanical pumps and steam boilers for stem% ejectors, there are semi- portable liquid-propellant-driven steam generators.
Author: F. B. Cyran
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: G. D. Westcot
Publisher:
ISBN:
Category : Rocket engines
Languages : en
Pages : 9
Get Book Here
Book Description
Author: Nasa
Publisher: PDQ Press
ISBN: 9780979828898
Category : History
Languages : en
Pages : 400
Get Book Here
Book Description
NASA commissioned the Columbia Accident Investigation Board (CAIB) to conduct a thorough review of both the technical and the organizational causes of the loss of the Space Shuttle Columbia and her crew on February 1, 2003. The accident investigation that followed determined that a large piece of insulating foam from Columbia's external tank (ET) had come off during ascent and struck the leading edge of the left wing, causing critical damage. The damage was undetected during the mission. The Columbia accident was not survivable. After the Columbia Accident Investigation Board (CAIB) investigation regarding the cause of the accident was completed, further consideration produced the question of whether there were lessons to be learned about how to improve crew survival in the future. This investigation was performed with the belief that a comprehensive, respectful investigation could provide knowledge that can protect future crews in the worldwide community of human space flight. Additionally, in the course of the investigation, several areas of research were identified that could improve our understanding of both nominal space flight and future spacecraft accidents. This report is the first comprehensive, publicly available accident investigation report addressing crew survival for a human spacecraft mishap, and it provides key information for future crew survival investigations. The results of this investigation are intended to add meaning to the sacrifice of the crew's lives by making space flight safer for all future generations.
Author: Bart Hendrickx
Publisher: Springer Science & Business Media
ISBN: 038773984X
Category : Technology & Engineering
Languages : en
Pages : 541
Get Book Here
Book Description
This absorbing book describes the long development of the Soviet space shuttle system, its infrastructure and the space agency’s plans to follow up the first historic unmanned mission. The book includes comparisons with the American shuttle system and offers accounts of the Soviet test pilots chosen for training to fly the system, and the operational, political and engineering problems that finally sealed the fate of Buran and ultimately of NASA’s Shuttle fleet.
