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Topic: Ram accelerator

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	Ram accelerator - Wikipedia, the free encyclopedia
		A ram accelerator is a gun that utilizes ramjet or scramjet combustion modes to accelerate a projectile to extremely high speeds.
		Ram accelerators optimized to use supersonic combustion modes can generate even higher velocities due to the ability to combust fuel that is still moving at supersonic speed.
		With a ram accelerator, the projectile is propelled primarily by the reaction of the propellant gasses burning, not the pressure in the barrel behind it.
	en.wikipedia.org /wiki/Ram_accelerator (427 words)

	Ram accelerator -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-19)
		Ram accelerators optimized to use (Click link for more info and facts about supersonic combustion) supersonic combustion modes can generate even higher velocities due to the ability to combust fuel that is still moving at supersonic speed.
		As the projectile moves further down the barrel, the amount of acceleration upon the projectile decreases, eventually reaching amounts trivial enough that a longer barrel is no longer justified (see (Click link for more info and facts about internal ballistics) internal ballistics).
		Ram accelerators are currently used primarily for research into supersonic combustion.
	www.absoluteastronomy.com /encyclopedia/r/ra/ram_accelerator.htm (502 words)

	Ram Accelerator
		The ram accelerator belongs to the transverse gas gun family because the hydrogen flow is transverse to the projectile direction.
		The ram accelerator is plagued by ablation and premature detonation in front of the projectile.
		The hydrogen core ram accelerator is a steel tube divided into two parts: the part near the axis is filled with hydrogen, while the outer part is filled with a mixture of fuel, oxidizer, and diluent.
	www.islandone.org /LEOBiblio/SPBI106.HTM (779 words)

	UW Ram Accelerator Facts
		When the gun is fired, the high pressure gas pushes against the obturator and projectile, injecting it supersonically into the ram accelerator section which is filled with the premixed propellants.
		In the ram accelerator, gaseous propellant is distributed along the length of the launch tube.
		The ram accelerator operating the thermally choked mode is similar to a conventional supersonic ramjet.
	www.aa.washington.edu /AERP/ramac/ramstats.html (713 words)

	RAM-Accelerator (Site not responding. Last check: 2007-10-19)
		This laboratory accelerator for ballistic studies differs from customary accelerators in that the acceleration energy is not released in a concentrated form and at a single moment (pulsed) but is distributed continuously in space and time.
		The projectile acceleration is therefore quasi constant and low (ratio of 1:3).
		The RAM accelerator consists of a conventional pre-accelerator (propellant powder gun) and a series of tubes arranged like steps one after another.
	www.isl.tm.fr /en/moyens_exp/ram_accelerator.html (148 words)

	Ram Accelerator
		University of Washington researchers have devised a scheme called the ram accelerator, not totally unlike Verne's approach, that has the potential to send acceleration-insensitive cargo into space, and moreover, to launch it in a more cost-effective way than any other method devised to date.
		In the ram accelerator, a projectile is accelerated by a combustion wave down a tube filled with propellant gas, achieving very high velocities.
		In the ram accelerator, the centerbody is now the projectile; it is detached from the tube, which has been lengthened into a long, stationary launching tube.
	www.washington.edu /research/pathbreakers/1983a.html (762 words)

	Ram Accelerator at the Univ. of Washington (Site not responding. Last check: 2007-10-19)
		The ram accelerator is a new launcher technology which is used to accelerate projectiles to hypersonic/hypervelocity speeds.
		In the ram accelerator, a subcaliber projectile, shaped like the centerbody of a ramjet, is propelled down the center of a stationary tube which is filled with a premixed gaseous propellant.
		More detailed information about the ram accelerator's history and current research topics is available on these pages or by contacting one of the researchers listed on the Personnel page.
	www.aa.washington.edu /AERP/ramac (179 words)

	Discover: Ramming speed - ram accelerators shoot projectiles at five times the speed of sound
		Like its slam-bang neighbors, the ram accelerator's purpose in life is to boost projectiles to blinding speeds.
		Ram accelerators, though, offer engineers a firsthand glimpse of the complex physical phenomena that take place in a ramjet engine, without anyone's having to shell out a fortune.
		The difference is that a ramjet or scramjet supplies thrust to an entire aircraft, whereas a ram accelerator supplies thrust to a small projectile.
	www.findarticles.com /p/articles/mi_m1511/is_n3_v15/ai_15238900 (1487 words)

	Data processing system - Patent 4080652
		Such accelerator memory is normally conformed as a random access store having switching times within the switching domain of the central processor.
		Further objects of the invention are to provide a memory accelerator system wherein the address sequence corresponds to the address locations of the main or bulk store.
		The contents of bus W are also periodically applied to a register 899 to be impressed onto bus A. Thus, RAM 293 provides the function of a program counter for the various task sequences which in parallel changes the operating modes of the control unit 800.
	www.freepatentsonline.com /4080652.html (8808 words)

	Ram Accelerator (Site not responding. Last check: 2007-10-19)
		The ram accelerator is plagued by ablation and premature detonation.
		Ram accelerator at Army Research Laboratory, Aberdeen Proving Ground, Maryland.
		The explosive ram accelerator is more expensive than the hydrogen core ram accelerator.
	lifesci3.arc.nasa.gov /SpaceSettlement/Nowicki/SPBI106.HTM (627 words)

	18th ICDERS Short Abstract (Site not responding. Last check: 2007-10-19)
		ISL has developed a ram accelerator facility that bypassed the gasdynamic transition directly from subdetonative to superdetonative ignition.
		To understand the combustion mechanism in a superdetonative mode ram accelerator according to the mixture strength, numerical simulations were done for ISL’s RAMAC 30 experiments by imposing external ignition energy on the combustor section to initiate detonation.
		Numerical results of shot 224(30bar) and shot 225(40bar) showed normal acceleration with similar flame structure even though the magnitude of acceleration was different according to the fill pressure.
	www.engr.washington.edu /epp/icders/abstracts/76.htm (301 words)

	Advanced Systems - Concepts (Site not responding. Last check: 2007-10-19)
		The Ram Accelerator is something like a ramjet in a tube.
		Ram accelerators often have multiple sections with different fuel/air mixtures and pressures, each separated by thin membranes.
		Ram accelerators have been used to accelerate projectiles up to about 2.5 km/sec (as compared to 7 km/sec for orbital speed).
	www.alt-accel.com /asc/techno.htm (984 words)

	RAM Accelerator
		Ram Accelerator In Jules Verne's classic 1865 story From the Earth to the Moon, protagonist Impey Barbicane sends a group of passengers to the...
		The report describes research performed at Stanford University to investigate ram accelerator phenomena using expansion tube and shock tube...
		Numerical Investigation of the External Propulsion Ram Accelerator...
	www.it-outpost.com /directory/r/RAM_Accelerator/index.shtml (181 words)

	Forthcoming Paper (Site not responding. Last check: 2007-10-19)
		A large variety of initiation results in a ram accelerator have shown that a series of interactive parameters play a key role, such as the design of the facility, tube diameter, shape of both the projectile and sabot and the choice of the reactive propellant mixture.
		Two different ram accelerators were used at ISL for this study, namely a 30-mm and a 90-mm-caliber.
		In addition to the diameter effect, it was observed that the dimension of the sabot must be adapted not only to the caliber of the tube but also to both the launching device and vent section that are located before the ram accelerator tube.
	www.edpsciences.org /articles/epjap/forth/abstracts/bauer.html (244 words)

	[No title]
		The scheme is reminscent of the idea of using a OMV in HEEO as a mass catcher for use with a gun-type launcher.
		The most interesting is: "The Ram Accelerator: A Chemically Driven Mass Launcher" P. Kaloupis and A. Bruckner.
		The ram accelerator contains nine different gas mixtures at 33 atmospheres (the gas mixtures tailored to have the correct properties for different ranges of projectile speed).
	www.cs.cmu.edu /afs/cs.cmu.edu/usr/mnr/st/std019 (1472 words)

	MAKE YOUR COMPUTER GO FASTER! (Site not responding. Last check: 2007-10-19)
		RAM Accelerator is a revolutionary new program that increases the power of your computer without the need for expensive upgrades!
		Quick and easy to use, RAM Accelerator will give your computer the performance it needs to keep up in today's fast-paced environment.
		RAM Accelerator helps defragment and optimize your RAM so that none of it is going to waste.
	www.ramaccelerator.com (235 words)

	PC / Internet Accelerator Technology
		Many free accelerators are mere tracking systems that record surfing habits and/or spawn pop-up ads as we surf.
		The Internet accelerator routines within ActiveSpeed are compatible with all Dial-Up modems (14-28-33-56K) AND high-speed connections including Cable, DSL, etc. This makes the software useful even after you upgrade your connection or PC system in the future.
		The Internet accelerator routines within many of these programs are compatible with all Dial-Up modems (14-28-33-56K) AND high-speed connections including Cable, DSL, etc. This makes the software useful even after you upgrade your connection or PC system in the future.
	www.inboost.com /internet-software.html (1472 words)

	Interrupt request controller for data processing system - Patent 4126893
		accelerator memory means, connected to said data bus and said priority selecting means, for automatically transferring said data and instructions from said serial memory in response to one of said program sequences.
		For this purpose the output lines form multiplexer 1004 are routed through a 1 bit wide register or RAM 1015, identified herein as a Dirty Bit (DB) RAM, which concurrently is loaded with a R/W (Read/Write) signal originating again in PROM 298.
		In addition there is a four bit field identified as the MF field controlling in one mode the operation of the branch logic 297 and in the other mode providing various miscellaneous functions not accommodated herein above.
	www.freepatentsonline.com /4126893.html (8937 words)

	1 (Site not responding. Last check: 2007-10-19)
		The problems concerning practicability aspects of a ram accelerator, such as intense in-bore projectile ablation, large accelerator tube length to achieve high projectile muzzle velocity and high entry velocity of projectile in the accelerator tube for starting the accelerator have been examined.
		Computational models of the processes like phenomenon of projectile ablation, flow in the aero-window used as accelerator tube-end closure device in case of high drive gas filling pressure in the ram accelerator tube have been presented.
		Possibility of deployment of ram accelerator in the defence-oriented role has been investigated to utilise its high velocity potential.
	www.drdo.org /pub/dsj/july04/abstract.htm (2490 words)

	18th ICDERS Short Abstract (Site not responding. Last check: 2007-10-19)
		This ram accelerator is designed to visualize the inside of the ram accelerator.
		The experiment was executed with the methane-oxygen-carbon dioxide mixture filled in the ram tube.
		We observed the combustion flow field around the projectile traveling with the velocity slower than that of the C-J detonation of the mixture, using the instantaneous shadow photograph and the direct photographing.
	www.engr.washington.edu /epp/icders/abstracts/145.htm (223 words)

	Letters
		Andrew's background is from a project called the Ram Accelerator, which is a ramjet/scramjet that does not carry fuel on board, but rather flies down a tube filled with premixed fuel and oxidizer at high pressure (50-200 bar).
		Due the high pressure, the accelerations of the projectile are tremendous (50,000g's) and nearly constant, making the device capable of accelerating projectiles to velocities greater than conventional guns: http://students.washington.edu/~buckwadl/RAM/ram.html
		The Ram Accelerator has already been successfully scaled up to 120 mm bore by the US Army Research Lab, and is currently being funding by the U.S. Navy as a possible "muzzle extension" to the current 5" guns to increase muzzle velocity and range.
	www.g2mil.com /Oct2001Letters.htm (3691 words)

	[No title] (Site not responding. Last check: 2007-10-19)
		According to RCS, they don't autoconfigure the RAM for two reasons: so that they can overcome the Amiga 2000's 8 meg limit, and (they claim) autoconfiguring the RAM would make it slower.
		RCS has hinted that they will be releasing a 32-bit CHIP RAM accelerator one of these days.
		I bought it with no RAM installed, since I already had four 1x9 meg, 70ns SIMMs which I intended to install onto the board.
	www.math.uh.edu /~barrett/data/hardware/accelerators/FusionForty (1693 words)

	UW: LFEM Resources: Programs, Cedar Wood Mission to Mars
		While there we learned about the Ram Accelerator and were given the opportunity to view it.
		A team of my students then built a model of the RAM Accelerator and prepared a summary of its future use.
		During the day of the simulated space launch, this team of students shared with visitors how the RAM Accelerator will hopefully launch payloads into space.
	www-k12.atmos.washington.edu /k12/resources/cedar_wood/bmcalli2.html (906 words)

	[No title] (Site not responding. Last check: 2007-10-19)
		It connects via the processor slot and may be populated with 4, 8, 16, 20, or 32 MB of 80ns (or faster) 32-bit RAM.
		I got mine during a special for Amiga User Groups and paid $995 for the board and $175 for 4 MB RAM.
		There was word of a Chip RAM accelerator, but nothing has come of it yet.
	www.math.uh.edu /~barrett/data/hardware/accelerators/FusionForty_2 (1171 words)

	ROAM FAQ
		ROAM is can be described as a ROM accelerator, not a RAM accelerator.
		Your ROM memory may not be much slower than your RAM memory, in which you may not see any appreciable speed increase.
		They already map the ROM into RAM, so this program is of no benefit to those machines.
	www.stg.com /employees/sbytnar/projects/roam_faq.html (2452 words)

	Abstract (Site not responding. Last check: 2007-10-19)
		Dynamic phenomena in 'rain-accelerator', a ramjet-in-tube concept for accelerating projectiles to ultra high velocities, have been investigated analytically and compared with the experimental investigations reported in open literature.
		The projectile resembles the centrebody of a conventional ramjet, but travels through a stationary tube filled with a mixture of gaseous fuel and oxidizer.
		The characteristics of subsonic combustion, thermally-choked mode of propulsion, which is capable of increasing tile velocity up to Chaptnan-Jouguet (C-J) detonation velocity of tile propellant mixture used in ram-accelerator tube, have been studied.
	www.drdo.org /pub/dsj/july98/abstract.htm (1271 words)

	Expert3D 128MB SDRAM (Sun Microsystems-X3678A) - PriceGrabber.com
		The Sun Expert3D graphics accelerator features 64 MB on-board memory for accelerated texture-mapping performance.
		Expert3D also supports true-color 3-D double and Z-buffering at very high resolutions for large screen HDTV monitor support, stereo-mode graphics for enhanced realism at high resolutions, and much more.
		Combine Sun Expert3D graphics acceleration with Sun Ultra workstations' balanced performance and the reliable, robust Solaris Operating Environment, and you have the ultimate high-performance visualization tool for demanding technical professionals.
	www.pricegrabber.com /search_getprod.php?masterid=281871 (178 words)

	Definition of Orbital spaceflight
		There are three main 'bands' of orbit: low Earth orbit, intermediate circular orbit and geostationary orbit.
		Project HARP was a failed attempt, and a ram accelerator is another design, to launch an object into orbit with a gun, possibly with additional propulsion by a rocket.
		This aircraft- or aerospace-related article is a stub.
	www.wordiq.com /definition/Orbital_spaceflight (286 words)

	Emuforums.com - graphic accelerator
		The thread topic says graphic accelerator, but he asked about RAM Booster...
		well i can tell you right now that most of those ram boosters and graphics boosters are pure horse crap...so the only way i could tell you is to go out and buy some...
		I did try RAM Booster, and you know...
	www.ngemu.com /forums/showthread.php?t=39648 (334 words)

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