61. Ion Propulsion Helps Spacecraft Cruise Solar System On The Cheap The Dawn mission to the asteroid belt will do twice as much for a third of the cost thanks to the steady stream of xenon used to propel the probe. http://www.wired.com/science/space/news/2007/10/ion_propulsion

@import "/css/toolbox_article_bottom.css"; @import "/css/article.css"; @import "/css/google_ad.css"; @import "/css/wiredcomment.css"; Subscribe Renew Give a Gift Change Address ... WIRED Science Top Stories Magazine Wired Blogs All Wired Science Space Ion Propulsion Helps Spacecraft Cruise Solar System on the Cheap By Robert Lemos NSTAR Ion Thruster Image: NASA The Dawn mission to the asteroid belt passed a critical test last weekend, exercising its gentle, yet reliable, ion-propulsion system to accelerate its mission to two destinations during an eight-year voyage through our solar system. The key: Ion propulsion only needs a tenth of the fuel of a chemical rocket system to reach the same destination, and that means a smaller rocket and a lot less fuel is needed to launch missions, such as the Dawn probe. The miserly use of propellant will allow the Dawn probe to become the first to orbit two separate objects in this case, the asteroid Vesta in 2011 and the dwarf planet Ceres, where it's expected to arrive in 2015. Ion propulsion uses positively charged atoms, or ions, to propel a spacecraft. An electron gun is used to knock electrons from a reservoir of xenon atoms, turning them into ions. Then, two charged plates accelerate the ions and eject them from the back of the rocket engine at speeds of 35 kilometers per second, or about 77,000 mph. To avoid accumulating a negative charge, the probe shoots electrons back into the stream of xenon ions leaving the engine.

62. ATK - An Advanced Weapon And Space Systems Company Supplier of aerospace and defense products. Munitions, smart weapons, propulsion and composite structures. http://www.atk.com/

HOME ABOUT US CUSTOMER SOLUTIONS INVESTOR RELATIONS ... INTERNSHIPS PRESS RELEASES LAUNCH CAPABILITIES January 21, 2008 ATK CFO John Shroyer to Speak at JPMorgan's 2008 High Yield and Leveraged Finance Conference January 15, 2008 ATK’s Constellation of Five Micro Satellites Collecting Crucial Scientific Data for NASA’s THEMIS Mission January 11, 2008 ATK Selected by Lockheed Martin to Design and Build Solar Arrays for NASA's Orion Crew Exploration Vehicle ATK is the prime contractor for the first stage of Ares I, NASA's next-generation launch vehicle that will carry astronauts to the International Space Station, the moon, to Mars, and beyond. SATELLITE AND SPACECRAFT CAPABILITIES SPACE EXPLORATION CAPABILITIES ATK is a leading provider of satellite bus structures, solar arrays, antennas, and extendable booms for earth observation satellites and space craft looking out to galaxies afar. From launch to landing and beyond, ATK solid rocket motors, composite technologies and solar arrays help lay the groundwork for human exploration. Back to top Home Search Terms and Conditions

63. Soft Skull: Deviant Propulsion By CAConrad I submit that CAConrad s Deviant propulsion, with its sculpted, condensed stanzas of rare, highspirited outpourings be slated for immediate worldwide http://www.softskull.com/detailedbook.php?isbn=1-932360-87-5

64. Lecture #32: Fusion Propulsion Two interesting early papers on D3He space-propulsion reactors are Englert (1962) and Hilton, et al. (1964). These papers followed much of the same logic http://fti.neep.wisc.edu/~jfs/neep533_lect32_99_fusionProp.html

University of Wisconsin-Madison Fusion Technology Institute Home Research ... Search NEEP533 Course Notes (Spring 1999) Resources from Space Lecture #32: Opening the Solar-System Frontier Title: Fusion Propulsion NEEP 533/Geology 533/Astronomy 533/EMA 601: Resources from Space April 9, 1999 Next: Lecture 33: Heavy Lift Launch Vehicles Previous: Lecture 31: Plasma and electric propulsion Up: Resources from Space syllabus Developing a frontier Q: Thomas Jefferson reputedly (by Willy Ley ) predicted in 1803 that it would take 800 years to settle the Louisiana Purchase. Nevertheless, most territories in the region achieved statehood before 1900. What happened? A: The introduction of a new technology, the train, shortened the travel time from New York to Chicago from six weeks to two daysenabling the development of the American West. The year 1803, coincidentally, saw the first operation of a train for commercial freight transport. Fusion propulsion, I believe, can be a similarly enabling technology for the space frontier. From the Rheilffordd Ffestiniog Railway Web pages Selected events in the history of fusion for space propulsion 1950's to 1970's: Conceptual designs were formulated for both D- He and D-T fusion reactors for space propulsion. These included

65. Space Exploration Technology: Space Exploration And Nuclear Propulsion Discusses the scientific aspects of nuclear propulsion in space. Includes technical concepts, technology basics with schematic diagrams, history and topical http://www.astrodigital.org/space/nuclear.html

Nuclear Propulsion Getting More Miles Per Gallon By Blair P. Bromley Contents Introduction Space Mission Analysis Limitations of Chemical Rocket Engines The Advantage of Nuclear Propulsion Systems Sample Calculations for a Mars Mission What Progress Has Been Made in Space Nuclear Power and Propulsion? Conclusions References Table 1: Types of Propulsion Systems Table 2: Mars Mission Comparison - Round Trip Figure 1: Mass Ratio Dependence on Mission Delta-V and Specific Impulse Figure 2: Schematic Diagram of a Solid Nuclear Thermal Rocket (NTR) Engine Introduction For those who are interested in the exploration and development of space by humans, nuclear propulsion technology is a very attractive option. Why? Compared with the best chemical rockets, nuclear propulsion systems (NPS's) are more reliable and flexible for long-distance missions, and can achieve a desired space mission at a lower cost. The reason for these advantages in a nutshell is that NPS's can get "more miles per gallon" than a chemical rockets. If NPS's were analogous to a 1998 Honda Civic, then your best chemical rocket would be a gas-guzzler from the 1950's. Space Mission Analysis For any space mission, there are a few basic questions that must be answered:

66. Jet Propulsion - Wikibooks, Collection Of Open-content Textbooks This book intends to provide an introduction to jet propulsion at the undergraduate level. A jet engine is a type of airbreathing internal combustion http://en.wikibooks.org/wiki/Jet_Propulsion

Jet Propulsion From Wikibooks, the open-content textbooks collection Jump to: navigation search Wikipedia has related information at Cross section of a high bypass two spool turbofan engine This book intends to provide an introduction to jet propulsion at the undergraduate level. A jet engine is a type of air-breathing internal combustion engine often used on aircraft. The principle of all jet engines is essentially the same; they accelerate a mass (air and combustion products) in one direction and, from Newton's third law of motion, the engine experiences thrust in the opposite direction. Contents Sister books Basic Concepts History Engine families ... edit Sister books Rocket Propulsion Aerodynamics Computational Fluid Mechanics edit Basic Concepts edit History Frank Whittle received the patent in 1930 for a jet engine. Hans von Ohain received the German patent in 1935. The first jet aircraft was the Heinkel He178 flown in 1939 with a von Ohain engine producing 4.9kN of thrust. My father told me his father ,Robert Bolton first patented the jet engine in 1917 using the name of his brother in law Stocker Harris ,we have a letter from the editor of Flight magazine saying that his patent was 17 years ahead of Whittle's.He also patented the "Bolton highspeed circuit breaker".I wouldn't know how to rescearch these "facts",I do know that he worked for the English electric company and Allan West electrics,where his designs where in the name of the firms he worked for. edit Engine families edit Jet engine types The main types are the

67. "Purdue AAE Propulsion Website" The following pages contain images and specs for many of today s rocket and airbreathing propulsion systems, as well as a compilation of useful data for http://cobweb.ecn.purdue.edu/~propulsi/propulsion/

Purdue School of Aeronautics and Astronautics Propulsion Web Page Sponsored by Allied Signal Welcome to the home of smoke and fire. The following pages contain images and specs for many of today's rocket and airbreathing propulsion systems, as well as a compilation of useful data for propulsion analysis using fundamentals of compressible flow and combustion. In addition, you can find out more about Purdue's Propulsion program here Engine Types, with Pictures and Statistics Rocket Engines Solid Rocket Motors Liquid Rocket Engines Satellite Propulsion Systems Advanced Concepts Airbreathing Engines Some Basic Concepts Turbojet Engines Turbofan Engines Turboprop and Turboshaft Engines ... VTOL and other advanced concepts Useful Propulsion Data Fundamental Properties of Internal Fluid Flows 1-D Isentropic Flow Gamma=1.4 Gamma=1.3 Gamma=1.2 Normal Shocks ... Rayleigh Flow Rocket Thrust Coefficient Tables Gamma=1.4 Gamma=1.3 Gamma=1.2 U.S. Standard Atmosphere Combustion and Thermochemical Data Periodic Table of the Elements Specific Heat Data for Common Gases NASA Thermochemistry Code - Sample Input Files Heats of Formation and Chemical Composition ... Constant Pressure Equilibrium Constants (Kp Data) Cool Video Clips Test Firing at Allegany Ballistics Laboratory, Alliant Techsystems, Inc.

68. Howstuffworks "How Electromagnetic Propulsion Will Work" Get a sneak peek (even before NASA scientists) at a new type of spacecraft that could be jolted through space by electromagnets. http://www.howstuffworks.com/electromagnetic-propulsion.htm

HowStuffWorks.com RSS Make HowStuffWorks your homepage Get Newsletter Search HowStuffWorks and the web: Science Space Future Space Related Categories: REFERENCE LINKS PRINT EMAIL How Electromagnetic Propulsion Will Work by Kevin Bonsor Inside This Article Introduction to How Electromagnetic Propulsion Will Work Jolting Into Space Beyond Our Solar System Lots More Information See all ... articles For decades, the only means of space travel have been rocket engines that run off of chemical propulsion. Now, at the beginning of the 21st century, aerospace engineers are devising innovative ways to take us to the stars , including light propulsion nuclear-fusion propulsion and antimatter propulsion. A new type of spacecraft that lacks any propellant is also being proposed. This type of spacecraft, which would be jolted through space by electromagnets , could take us farther than any of these other methods. Source: NASA Electromagnetic propulsion could take us to the heliopause at a speed unachievable by conventional spacecraft. When cooled to extremely low temperatures, electromagnets demonstrate an unusual behavior: For the first few nanoseconds after electricity is applied to them, they vibrate.

69. Propulsion Systems Analysis Branch The PSAO is a systems analysis group within NASA Glenn s Aeronautics Directorate. We analytically predict the thermodynamic cycle performance of a variety http://www-psao.grc.nasa.gov/

70. Propulsion Ventures - Welcome Founded in 1995, propulsion Ventures is a top tier venture capital firm with $200 million under management. propulsion actively invests in promising http://www.propulsionventures.com/

Afficher_Flash("propulsion.swf"); 2007/09/12 : Palo Alto, California; Quebec City, Canada - Coveo Solutions Inc., a global provider of secure enterprise search solutions, announced today that its patented Coveo Audio and Video Search (CAVS) technology was selected by editors of KMWorld Magazine as one of the "Trend-Setting Products of 2007." [ read it 2006/10/25 : Coveo Solutions Inc., announce that it has secured $6 million through a Series A Preferred venture capital financing agreement read it 2006/09/20 : MODASolutions Secures US $11 Million in Funding read it 2006/06/12 : Propulsion Ventures announces the sale of Montreal-based VertigoXmedia read it 2006/05/11 : Propulsion Ventures announces the sale of Montreal-based Interstar Technologies read it 2006/04/06 : Propulsion Ventures announces the appointment of two new partners: Thomas Birch and David Bernardi read it 2006/02/27 : Launch of Propulsion Ventures III S.E.C. Fund read it 2005 CVCA Deal of the Year Award read it read it 2005/09/29 : Taleo IPO read it Print Founded in 1995, Propulsion Ventures is a top tier venture capital firm with $200 million under management. Propulsion actively invests in promising early-stage software companies in Canada. Propulsion Ventures, based in Montreal, is one of four of

71. HobbySpace - New & Proposed Launch & Propulsion This page looks various launch and propulsion technologies that have either recently come into operation or are proposed. http://www.hobbyspace.com/Links/LaunchPropulsion1.html

Home Tech Culture Activities ... Site Info Index Space News Headlines Space Blogs Forums, etc ... Living in Space RLV: General, US World Technology History ... Science Web HobbySpace This page looks various launch and propulsion technologies that have either recently come into operation or are proposed. General Overviews Launch costs Conventional Launch Systems Sounding Rockets ... Rocketry Competitions General Overviews of Future Launchers, Advanced Concepts, etc. Survey of Private Space Ventures (continued) - Dec.11.05 Low Cost Launch Vehicles - list at astronautix.com Science@NASA Propulsion Series: The Right Stuff for Super Spaceships:Tomorrow's spacecraft will be built using advanced materials with mind-boggling properties.- Science@NASA - Sept.16.02 Houston, are we there yet? : NASA is developing a variety of new safe and fast technologies to propel explorers across the solar system. - Science@NASA - Sept.9.02 The Future of Earth-to-Orbit Propulsion by Robert C. Truax - Rocketry Online - In Our Opinion Scientific American : February 1999 Issue - several articles on innovative propulsion schemes.

72. JANNAF -Home to enable global leadership in aerospace propulsion by responding to current and future propulsion needs of our country. New at JANNAF http://www.jannaf.org/

JANNAF MISSION AND SCOPE HISTORY OF JANNAF JANNAF EXECUTIVE COMMITTEE ... TECHNICAL MEETINGS AND WORKSHOPS The JANNAF Vision... ...to enable global leadership in aerospace propulsion by responding to current and future propulsion needs of our country. New at JANNAF 34th PEDCS and 23rd SEPS Meeting Review (August 2007) JANNAF Journal Accepting Manuscripts for Inaugural Issue JANNAF Journal of Propulsion and Energetics Inaugural Issue Scheduled for 2007 JANNAF Public Papers site General Tools Practices and Procedures Manual (March 2006) [Acrobat PDF] Paper Clearance Form [Acrobat PDF] DoD Distribution Statements [outside link] JANNAF Journal Tools Author's Guide [Acrobat PDF] Technical Scope [MS Word document] Instructions for Uploading JANNAF Journal Manuscript [Acrobat PDF] Tech Meeting Tools [Acrobat PDF] Manuscript Template [MS Word Template] Workshop Guidelines [Acrobat PDF] Abstract Submittal Form (Current Meetings) Acronyms To order JANNAF Publications call 410-992-7300 or email pubs@jannaf.org

73. The Daily O’Collegian » Rocket Propulsion Research Might Advance Military On the Web and at Oklahoma State University since 1895. http://ocolly.com/2008/01/18/rocket-propulsion-research-might-advance-military-t

Search Archives Sponsored Ad About About Us Subscriptions History ... Friday, January 18, 2008 Aerospace amazement Rocket propulsion research might advance military technology By Ted Bado Staff Writer Oklahoma State researchers are developing a state-of-the-art propulsion system for the United States Defense Advanced Research Projects Agency. If successful, the propulsion system will be featured in sophisticated unmanned aircraft small enough to fit into a soldier’s pocket. “What we want the infantrymen to be able to do is pull a pack of six or so out of their pocket and have them ready for use,” Jamey Jacob, an associate professor of mechanical and aerospace engineering, said. The aircraft would be used for surveillance purposes and allow soldiers to inspect hostile areas before moving through them. Jacob and his team have been working on the project since the end of August. “It’s a new propulsion technology to be used by micro and nano-unmanned aerial vehicles, or UAV,” Jacob said. “By micro, we mean smaller than a foot, and by nano, we mean smaller than six inches.” Jacob’s project would provide a significant upgrade over the UAV equipment currently available to soldiers.

74. Antigravity Propulsion, Levitation AntiGravity propulsion= A Faster Stairway to the Stars ! http://antigravitypower.tripod.com/

***AntiGravity*** *Propulsion* - A Faster Stairway to the Stars !!! - 'Photos Courtesy of NASA = Hubble Space Telescope' AntiGravity is the AeroSpace Propulsion System of the Very Near Future !!! This Web Site is Dedicated to Defining the Mechanisms to Construct AntiGravity Propulsion Systems. Fly me to the moon Let me sing among the stars Let me see what spring is like On Jupiter and Mars * These lyrics by Bart Howard(1954) * 'There are no unnatural or supernatural phenomena, only very large gaps in our knowledge of what is natural...We should strive to fill those gaps of ignorance.' * Edgar D. Mitchell = Apollo 14 * 'We live in an extraordinary age! We are set irrevocably, I believe, on a path that will take us to the stars...' * Carl Sagan = AstroPhysicist * 'We can lick gravity, But sometimes the paperwork is overwhelming!' * Wernher von Braun = Rocket Scientist * 'Chemical rockets produce thrilling loud noises and spectacular fireworks - thereby providing great entertainment and distraction for the general populace!'

75. Propulsion Rafting Riviere Rouge Quebec Translate this page Informations sur la descente de la rivière rouge au Canada en rafting. http://www.propulsion.ca/

76. Custom Propulsion Systems: Custom CNC Propellers Custom propulsion Systems, doing business as Ellis Propeller is a Jacksonville, FL based propeller manufacturer who specializes in Custom Propellers. http://www.custom-ps.com/

Welcome to Custom Propulsion Systems, Inc. dba Ellis Propeller Company , where old world carftsmanship and new world technology meet to produce the finest boat propellers and marine hardware around. Announcement - 6/27/07 List of Patterns and Pattern Photos Custom Propulsion Systems is selling excess boat propeller patterns that are on hand. Patterns for sale include Columbian Bronze patterns and Ellis designed patterns. All Announcements About Us Here at Custom Propulsion Systems we specialize in custom propellers and high-tech surface propellers . We have complete in-house CNC machining and CAD design capacity so we can produce high quality custom propellers to exacting customer specifications. Our foundy is capable of pouring Manganese Bronze, Nickel Aluminum Bronze (NiBrAl) and Aluminum. The company has complete machining and finishing capabilities utilizing the finest craftsman in the industry. History In business since 1953, Ellis Propeller is one of the largest full service and marine hardware manufacturers in the Southeastern United States located in Jacksonville, Florida. Ellis Propeller has complete in-house state-of-the-art marine engineering and navel architectural design capabilities. In 1988, Ellis Propeller purchased the Columbian Bronze tooling for the hydrosonic, Crewboat, Fishmaster, Kaplan, Mako, and many others designs. In 1996, Ellis Propeller was sold and became Custom Propulsion Systems, doing business as the Ellis Propeller Company.

77. SERVER BUSY ZF Marine for marine transmissions, Surface Drives, Propellers, Gears, Controls and complete propulsions Systems. Products for all vessels from the smallest http://www.zfmarine.com/

SECURITY ALERT You have activated the SERVER 'Denial of Service' protection script. This script is designed to protect the server from malicious attacks. We appologise if you were using the site normally and suggest you try again in a few hours. The script can be triggered by several indicators associated with excessive requests over a short time scale. It can also be triggered by: Site copying software. Incompatible browsers. Browsers that are modified to hide the identity of the user. PRIVACY: We respect the privacy of all visitors. Activity is only monitored to safeguard the operation of the server and to facilitate user specific functions so you don't have to login on every visit. This information is for server administration only - NO information is passed to third parties. www.zfmarine.com

78. Canonical List Of Space Transportation Methods Attempts to list all known space propulsion methods. http://www.geocities.com/danielravennest/CanonicalList.html

Canonical List of Space Transportation and Engineering Methods Version 0.79 July 26, 2001 by Dani Eder DaniEder@aol.com This document is a an attempt list of all known space transport and space engineering methods. It includes only those methods whose underlying physical principles are understood (i.e. no Star Trek warp drives). It is the product of a number of years of collecting and, occasionally, inventing them. I am motivated by a desire to see civilization expand into space and my frustration by the slow pace of progress to date. Most current space vehicles and projects use techniques that existed in the 1950's and 1960's. Some new ideas were developed as early as 1960, but have not been put into used even today. From the 1970's to today many additional ideas have been generated. Most of these have received scant attention. By disseminating information on these ideas, I hope others will realize the vast untapped potential contained in these ideas. This draft (version 0.79) lists all the concepts I am aware of, with at least a basic description of each. As you can tell by the version number, which is less than one, this is still very much a work in progress. Later versions of this document are intended to flesh out each method with improved descriptions and current references. If you know of a method which is not on this list, I would appreciate being informed of it. If you have references or text descriptions on a concept, they would be appreciated also. Some related information on the basics of space transport, the forces and energies used, and space project engineering are included. Editorial comments and material that needs lots of editing appear in square brackets.

79. DARPA/MTO/MEMS Digital Micro-Propulsion Project The DARPAfunded TRW/Aerospace/Caltech MEMS Digital Micro-propulsion Program has two major goals. The first is to demonstrate several types of MEMS http://design.caltech.edu/micropropulsion/

DARPA MTO MEMS Digital Micro-Propulsion Project Project Title: "Microsatellite Propulsion and Attitude Control System" DARPA BAA 96-19 Sponsored by: Defense Advanced Research Projects Agency (DARPA) Microsystems Technology Office (MTO) Micro-Electro-Mechanical Systems (MEMS) Program Clark T.-C. Nguyen, Ph.D. , Program Manager cnguyen@darpa.mil Digital Micro-Propulsion Prototype Chip TRW David H. Lewis, Ph.D. Program Manager david.lewis@trw.com One Space Park Redondo Beach, CA 90278, U.S.A. The Aerospace Corporation Siegfried W. Janson, Ph.D. Principal Investigator siegfried.w.janson@aero.org P.O. Box 92957 Los Angeles CA 90009-2957, U.S.A. Sub-Contractors California Institute of Technology Prof. Erik K. Antonsson, Ph.D., P.E., Principal Investigator Engineering Design Research Laboratory Department of Mechanical Engineering Division of Engineering and Applied Science 1200 East California Blvd. Pasadena, CA, 91125, U.S.A. October, 1999 Technology Review article references the DARPA-funded TRW/Aerospace/Caltech MEMS Digital Micro-Propulsion project. Page 82 November, 1998

80. SPL Swiss Propulsion Laboratory, Affordable Rocket Propulsion And Accessories Aims to develop systems to transport small civilian payloads into a lowearth orbit (LEO). http://www.spl.ch/

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