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	Space Shuttle Main Engine (SSME) - Summary
		The SSME has achieved 100% flight success and a demonstrated reliability of over 0.9999.
		The SSME is a re-usable, staged combustion liquid oxygen / liquid hydrogen engine.
		The 77.5 : 1 area ratio nozzle was selected to optimize SSME performance along it's flight path from lift-off to orbit.
	www.spaceandtech.com /spacedata/engines/ssme_sum.shtml (59 words)

	PC Pro: Product Reviews: SmartSuite Millennium Edition 9.5
		SSME really was the first true intranet suite and the significance of this perhaps wasn't fully appreciated.
		With the launch of SSME 9.5 comes an opportunity to re-evaluate the suite in the context of its current competition, namely Microsoft Office 2000 (reviewed issue 57, p166) and WordPerfect Office 2000 (reviewed issue 59, p178).
		Most SSME applications also have the ability to open and save documents directly from or to a Domino database, streamlining the information-management system.
	www.pcpro.co.uk /reviews/216/smartsuite-millennium-edition-95.html (1757 words)

	MAIN PROPULSION SYSTEM
		In each SSME, a small portion of liquid oxygen is diverted into the engine's oxidizer heat exchanger, and the heat generated by the engine's high-pressure oxidizer turbopump converts the liquid oxygen into gaseous oxygen and directs it through a check valve to two orifices and a flow control valve for each engine.
		During SSME thrusting periods, liquid oxygen tank pressure is maintained between 20 and 22 psig by the orifices in the two lines and the action of the flow control valve from each SSME.
		The SSME thrust level depends on the flight: it may be 100 percent or 104 percent for some missions involving heavy payloads or may require the maximum thrust setting of 109 percent for emergency situations.
	science.ksc.nasa.gov /shuttle/technology/sts-newsref/sts-mps.html (14311 words)

	developerWorks : Blogs : SSME bloggers (Site not responding. Last check: 2007-11-05)
		SSME is the application of scientific, engineering and management disciplines to tasks that one organization beneficially performs for others ("services").
		SSME (Services Sciences, Management, and Engineering) is still emerging, and is seeking to formalize many areas of innovation related to services, including Blue ocean strategies.
		SSME deals with the multidisciplinary study of service system design and evolution, in which clients and providers coproduce value via work sharing, risk sharing, information sharing, and decision sharing configurations of people, technology, and organizations.
	www-128.ibm.com /developerworks/blogs/dw_blog.jspa?blog=510 (3369 words)

	Space Shuttle Main Engines: is there a future? Rockwell and Boeing
		SSMEs may be the best engines flying, but reducing engine weight may still prove essential for true Single-Stage-to-Orbit flight.
		Asked if there were any limiting factors on how long SSMEs could be kept flying, McMillion said that upgrades will continue, and "we are going to be marketing this engine for the foreseeable future." He expects no problems keeping the vendor base in line.
		Because of its association with the Shuttle, the SSME "is perceived in a terrible light.
	www.speakeasy.org /~donaldfr/ssme.htm (2878 words)

	Active Skim View of: 5 PROPULSION
		Modifications of the present SSME engine that will be used in the space shuttle program include improved LOX and LH2 turbopumps, a single-tube heat exchanger, a two-duct powerhead, a simplified low-pressure oxidizer turbopump, a large throat main chamber, and an improved engine controller.
		The SSME Block I, which flew on the shuttle in 1995, and RD-0120 have F/W values of 51 and 43, respectively, whereas the requirement for the RLV is between 75 and 80, depending upon vehicle configuration, vehicle weight, and engine specific impulse.
		MCC manufacture of the SSME Block II engine will be reduced to 24 months by using precision castings of the combustion manifolds rather than welding and by improvements in the plating and assembly process.
	www.nap.edu /nap-cgi/skimit.cgi?isbn=0309054370&chap=55-75 (929 words)

	Cape Canaveral Rocket and Missile Programs:
		SSME thrust is variable, which is extremely important in Space Shuttle mission applications.
		SSME thrust can be varied from a range of 65% minimum to 109% maximum of their 100% rated power levels at precise increments of 1% as needed.
		If all three SSME's do not reach a mandatory thrust of 90% over the course of the next three seconds, a Main Engine Cutoff command is initiated automatically, followed by the cutoff of all three SSME's and a number of safety functions.
	www.spaceline.org /rocketsum/main-engines.html (894 words)

	SHUTTLEPOWER
		Each SSME is controlled by its own computer, which checks the health of the engines 50 times per second during countdown and ascent.
		The SSMEs were designed in the late 1970s by Rocketdyne, now a part of the Boeing Company.
		The SSMEs throttle down to reduce stress during the period of maximum dynamic pressure, and then throttle up to 104.5 percent propelling the orbiter to 17,500 miles per hour.
	shuttle.msfc.nasa.gov /SSME.cfm (585 words)

	Boeing: Rocketdyne: Space Shuttle Main Engine Amazing Facts (Site not responding. Last check: 2007-11-05)
		Although not much larger than an automobile engine, the SSME high-pressure fuel turbopump generates 100 horsepower for each pound of its weight, while an automobile engine generates about one-half horsepower for each pound of its weight.
		Even though Rocketdyne's SSME weighs one-seventh as much as a locomotive engine, its high-pressure fuel pump alone delivers as much horsepower as 28 locomotives, while its high-pressure oxidizer pump delivers the equivalent horsepower for 11 more.
		The SSME high-pressure fuel turbopump main shaft rotates at 37,000 rpm compared to about 3,000 rpm for an automobile operating at 60 mph.
	www.boeing.com /defense-space/space/propul/SSMEamaz.html (244 words)

	NASA Eyes Alternative to Shuttle Main Engine for Heavylift
		NASA had previously planned to use a modified version of the SSME to power the Crew Launch Vehicle's upper stage, but decided earlier this year instead to go with an updated version of the J-2 engine that powered the upper stage of the Saturn 5 rocket.
		The SSME also also built by Pratt and Whitney Rocketdyne and has been in service for more than 25 years, powering every space shuttle on its way to orbit.
		Each SSME is capable of producing just under 420,000 pounds of thrust at sea level.
	www.space.com /spacenews/businessmonday_060320.html (792 words)

	MPTA-098 - Wikipedia, the free encyclopedia
		After extensive repairs were completed, testing resumed in September, but on November 4, a high-pressure oxidizer turbopump failed 9.7 seconds into a scheduled 510-second test.
		Finally, on December 17, 1979, a complete static firing was accomplished that included all three Space Shuttle Main Engines running at up-to 100 percent of rated thrust for 554 seconds, exceeding the predicted maximum time that the SSME's would burn during an operational shuttle launch.
		On January 17, 1981, with less than three months remaining before the scheduled STS-1 launch date, MPTA-098 successfully demonstrated a 625-second firing that included simulated abort profiles, completing the final PFC test and allowing the SSME design to be fully certified for flight, clearing the way for the launch of STS-1 on April 12, 1981.
	en.wikipedia.org /wiki/MPTA-098 (710 words)

	METU-SSME (Site not responding. Last check: 2007-11-05)
		Study of various topics related to teaching methodology in research studies to help students develop a more critical perspective, to increase awareness of the variety of approaches to studying teaching and to provoke thought about appropriateness of teaching method(s) in teaching the subjects.
		Characteristics of various instructional technologies, the place and use of technologies in instructional process, development of teaching materials through instructional technologies (worksheets, transparencies, slides, videotapes, computer-based course material, etc.) and quality assessment of various teaching materials with respect to their feasibility and efficiency for the applications in science/mathematics education.
		Practice teaching in a classroom environment for acquiring required skills in becoming an effective science or mathematics teacher (one day or two half days a week; minimum 12 weeks); teaching of a course(s) in a planned way to improve teaching skills in the real classroom setting.
	www.fedu.metu.edu.tr /ssme/courses.html (610 words)

	SSME
		A dual-redundant igniter was used during the engine start sequence to initiate combustion.
		The SSME could be throttled between 67% and what NASA called "109%" of its rated thrust.
		Launches normally used 104% (2170 kN) as a maximum, with 109% (2280 kN) reserved for abort emergency situations.
	www.astronautix.com /engines/ssme.htm (392 words)

	Adaptive Machine Learning
		Many interrelated SSME sensors must be monitored in real-time and compared against expected behaviors; an out of tolerance value can cause a launch scrub…in flight, a failure could be disastrous.
		The most serious cases typically occur in the last few seconds before ignition; a launch scrub that late in the countdown usually means a period of investigation of a month or more.
		The actuator at the left is one used to gimbal one of the three SSMEs on a shuttle.
	www.interfacecontrol.com /news/AML_STTR.htm (819 words)

	The UW SSME Constitution
		Subsequent policies defining the character and structure of the UW SSME may be included in separate policy or regulation statements.
		The general membership of the UW SSME shall consist of undergraduate and graduate students who are student members of at least one of CSME, ASME, SAE, and enrolled in the Faculty of Engineering at the University of Waterloo.
		The Faculty Advisor of the UW SSME shall be appointed by the chairperson of the Department of Mechanical Engineering on the advice of the current executive council.
	www.eng.uwaterloo.ca /~ssme/constitution.html (2865 words)

	Thermal and Structural Analysis Conducted on Hollow-Core Turbine Blade of the Space Shuttle Main Engine (Site not responding. Last check: 2007-11-05)
		For instance, the thermal transient during startup within the space shuttle main engine (SSME) can lead to a gas temperatures in excess of 3000 °C, affecting the operating life of key components, such as the turbine blades.
		Moreover, because of the anisotropic nature of the single crystal, the stress-strain response and the dynamic characteristics of any component made out of single crystal (such as the turbine blade) would depend on both the secondary and the primary orientation angles.
		A previous study (ref. 1) involving a flat plate of single-crystal material subjected to thermal loading showed that the influence of the secondary orientation on the elastic stress response is very substantial.
	www.grc.nasa.gov /WWW/RT1995/5000/5220aa.htm (510 words)

	Stephen Gloor: Science (Site not responding. Last check: 2007-11-05)
		Of course the SSME is going to outperform the RS-68 in a vacuum as this is what is was specifically designed for.
		Also with the SSME the turbo pump is so highly loaded because of the high chamber pressure that small dents and eddies in the fuel lines can lead to fuel or oxidizer starvation which in milliseconds can lead to the destruction of the turbo pump and motor.
		The SSME being such a high performance engine is more sensitive to such changes and will be much harder to re-integrate with the new vehicle.
	stevegloor.typepad.com /sgloor/science (6912 words)

	Services Science, Management and Engineering (SSME) at UC Berkeley
		Services Science, Management and Engineering (SSME) at UC Berkeley is a multi-disciplinary effort to conduct research and teaching in the emerging discipline of services science.
		The theoretical foundations of SSME come from the disciplines of economics, computer science, engineering, law, and organizational sociology, each of which provides important perspectives on the evolution of the information and services economy.
		But SSME would be merely theoretical without the pragmatics provided by business strategy and operations, information technology, accounting and finance, and user-centered design, each of which contributes insight about the services lifecycle from design to implementation to deployment.
	ssme.berkeley.edu (317 words)

	Space Shuttle Performance Enhancements (Site not responding. Last check: 2007-11-05)
		The Block II SSME project was initially undertaken as a "safety improvement" since the modified engines have more margin between nominal operating temperatures and pressures and "redline" values.
		By applying a different bias to the trim angles of each SSME, the thrust vectors are "paralleled" in the pitch axis, resulting in maximum thrust in the desired direction.
		The roll is a simple roll around the vehicle’s longitudinal axis performed by the SSME’s at an earth relative velocity of 12, 200 feet per second.
	www.theandyzone.com /launchzone/pe.html (1099 words)

	SSME (Site not responding. Last check: 2007-11-05)
		In 1971, the Society moved to Luddenham in Sydney’s southwestern suburbs to a 10 hectare (25 acre) property previously used as a farm, and a new clubhouse and facilities were built.
		The SSME today is located on a rural property in Sydney’s south western suburbs, approx 50km from the city central business district.
		The SSME will be hosting the 50th Australian Association of Live Steamers Annual Convention at Luddenham at Easter, 14~17 April 2006, coinciding with the 100th anniversary of the club.
	www.livesteaming.com /clubs/club_pages/SSME.htm (330 words)

	Space Shuttle Main Engine Test
		SSME Test with preliminary commentary (44:35 minutes - Fast forward 2.5 minutes from the start for first picture)
		Space Shuttle Main Engines (SSME) have been flying for more than 20 years, yet those flying today are much more capable and reliable than those that lifted STS-1 on April 12, 1981.
		This increased capability and reliability and the fact that these engines are used to lift people and not just cargo, requires a continuous program of testing to assure the safety of the astronauts and their cargo.
	science.nasa.gov /enginetest (239 words)

	Feature Article (Site not responding. Last check: 2007-11-05)
		To meet this challenge, NASA and Pratt and Whitney, its contractor for the main engine turbopump, have implemented programs over the past several years that convert costly welded, assembled and forged components into one-piece cast metal parts that are more economical, safer and reliable.
		In 1986, Pratt and Whitney accepted a challenge to develop alternate turbopumps for the SSME that would be capable of 55 missions between major overhauls, a factor 10-20 times better than the previous pump designs.
		In addition to the same materials and processes used on the liquid oxidizer pump (all of the investment castings are also produced by Howmet), the fuel pump also features the more common of casting methods&emdash;sand casting.
	www.castsolutions.com /archive/01_feature_article.html (2188 words)

	spinoff 2004-FLUID FLOW TECHNOLOGY THAT MEASURES UP
		This instrument was missing since the original SSME included a LOX turbine flow meter that failed during a ground test, resulting in considerable damage for NASA.
		Marshall and QMC engineers performed extensive modeling and analysis of the SSME system, and determined that the existing instrumentation was not sufficient to fully evaluate the SSME health status primarily relating to turbine blade failures.
		To meet the SSME LOX flow need, the group required a meter that would operate in different fluid physical states; accommodate wide variations in temperature, pressure, vibration, and flow conditions; measure flow with less than 1-percent error; and provide a mechanically robust system with low probability of failure.
	www.sti.nasa.gov /tto/Spinoff2004/ip_2.html (794 words)

	Space shuttle main engine - Wikipedia, the free encyclopedia
		The Space Shuttle orbiter has three main engines (SSMEs).
		They are very sophisticated power plants that burn liquid hydrogen with liquid oxygen, both from the Space Shuttle external tank.
		MPTA-098 - the SSME test article used in Shuttle development
	en.wikipedia.org /wiki/SSME (1955 words)

	Boeing: Rocketdyne: Space Shuttle Main Engine (Site not responding. Last check: 2007-11-05)
		The SSMEs have achieved 100% flight success with a demonstrated reliability of over 0.999.
		Using a mixture of liquid oxygen and liquid hydrogen, the SSME can attain a maximum thrust level (in vacuum) of 512,950 pounds which is equivalent to greater than 12,000,000 horsepower.
		This upgraded SSME configuration was launched in January 1998.
	www.boeing.com /defense-space/space/propul/SSME.html (207 words)

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