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Topic: Magnetohydrodynamic drive

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	What is a Magnetohydrodynamic Drive? (Site not responding. Last check: 2007-11-05)
		A magnetohydrodynamic (MHD) drive is an engine with no moving parts that creates thrust by accelerating a charged fluid with an electromagnetic field.
		Magnetohydrodynamics in general is the scientific discipline that studies any electrically charged fluids.
		However, because their fuel source is electricity and we still lack a cheap means of creating high power-density fuel cells, ships that use the MHD drive must have a heavy onboard generator that burns diesel.
	www.wisegeek.com /what-is-a-magnetohydrodynamic-drive.htm (335 words)

	Magnetohydrodynamic Ion Drive
		Ion drives are a subfield of the larger electric propulsion device group.
		In a nutshell, ion drives work by ionizing a gaseous fuel such as Xenon and then accelerating it in an electric field and ejecting it out the back of the spaceship.
		With the ion drives high it can obtain the same or greater total impulse as a chemical rocket by thrusting for a longer period of time.
	www.madmadscientist.com /iondrive.html (3254 words)

	Magnetohydrodynamic drive - Wikipedia, the free encyclopedia
		A Magnetohydrodynamic drive or MHD propulsor, is a method for propelling seagoing vessels using only electric and magnetic fields with no moving parts, using magnetohydrodynamics.
		The movie The Hunt for Red October popularized the magnetohydrodynamic drive as a caterpillar drive for submarines, an undetectable "silent drive" intended to achieve stealth in submarine warfare.
		A number of experimental methods of spacecraft propulsion are based on magnetohydrodynamic principles.
	en.wikipedia.org /wiki/Magnetohydrodynamic_drive (426 words)

	what is a magnetohydrodynamic drive.htm
		A zip drive is a type of removal disk storage capable of holding a moderate amount of computer inform...
		A CV joint, or constant velocity joint, is part of a drive shaft, the shaft that attaches to a car's...
		A hard drive duplicator is a stand-alone device used to clone hard drives quickly, easily, and with c...
	www.wisegeek.com /s/what-is-a-magnetohydrodynamic-drive.htm (387 words)

	Magnetohydrodynamics (MHD)
		Magnetohydrodynamics involves magnetic fields (magneto) and fluids (hydro) that conduct electricity and interact (dynamics).
		MHD technology is based on a fundamental law of electromagnetism: When a magnetic field and an electric current intersect in a liquid, their repulsive intersection propels the liquid in a direction perpendicular to both the field and the current.
		The ten inch diameter tubes are individually wrapped in saddle shaped superconducting magnetic coils made of niobium titanium alloy filaments packed into wires with copper cores and shells.
	www.skewsme.com /mhd.html (327 words)

	Military Applications of Superconductivity (Site not responding. Last check: 2007-11-05)
		The reaction force from the moving seawater produces thrust.
		Being considered by the Navy for quiet submarine electric drive.
		Example: A concept has been developed by Lockheed Martin for the Navy using the water flowing in an annulus configuration around the hull of a submarine.
	members.tripod.com /mikeheiberger/page8.htm (112 words)

	the Otherpower.com Discussion Board \|\| Magnetohydrodynamic generator
		Magnetohydrodynamic propulsion (A.K.A. MHD motor, MHD drive or Catterpiller Drive).
		MHD is just a normal faraday's law generator/motor with the fluid as the moving conductor in place of the copper wire, and the electrodes as the brushes.
		You MUST drive a current through the fluid, which means the electrodes must donate and accept electrons to/from the ions in the solution.
	www.fieldlines.com /story/2004/7/29/0355/45526 (1372 words)

	Evil Mad Scientist Laboratories - MHD III: Hacking an RC Boat to use Magnetohydrodynamic Propulsion
		As in the case of the simple MHD craft, that means that we need a (strong) magnet and a (large) electric current that flows perpendicular to the magnetic field.
		Whereas the seal between the deck and hull is a tidy O-ring, the seal around the drive shaft consisted primarily of a giant pile of grease that had to be scooped out.
		Rather than using quarters for the MHD drive electrodes, I used a couple of soft steel brackets that I cut (with a hacksaw) from an old HP plotter paper tray.
	www.evilmadscientist.com /article.php/RCMHD (2445 words)

	Critical Problem Areas
		These auroral activity indices are derived from ground magnetometer measurements of the magnetic field due to ionospheric currents from 11 to 14 stations spaced around the auroral region, and represent the maximum perturbation from the eastward electrojet (AU), the maximum from the westward electrojet (AL) and the sum of the magnitudes (AE).
		The simple analytical model of Goertz et al., derived on the basis of frontside reconnection, force balance in the tail and Alfvén wave coupling to the ionosphere (magnetohydrodynamic waves associated with transverse motion of lines of magnetic force), optimized 6 free parameters for the data set studied.
		McPherron and Rostoker [1993] were unsuccessful in reproducing their results on other data sets and suggested that the free parameters were unique to that data set and that there are also storage release contributions to the currents.
	www.agu.org /revgeophys/maynar01/node5.html (775 words)

	Magnetohydrodynamic Propulsion: Interesting Thing of the Day
		The scientific principle in question is known as magnetohydrodynamics, which is a fairly straightforward combination of magneto (as in magnet), hydro (as in water), and dynamics (as in motion).
		So a submarine with an MHD drive would not be quite as stealthy as you might imagine.
		Magnetohydrodynamics and the Lorentz Force Law by Reg Milley at the University of British Columbia
	itotd.com /articles/500/magnetohydrodynamic-propulsion (999 words)

	Steam fires underwater jet engine (Site not responding. Last check: 2007-11-05)
		The Pursuit Marine Drive produces thrust by using the energy from high-pressure steam to draw in water through an intake at the front and expel it at high speed through the rear.
		Steam for the drive is generated in a small boiler burning diesel or petrol.
		If the drive is being used to assist propulsion in a ship, the boiler can scavenge waste heat from conventional engines.
	www.freerepublic.com /focus/news/832074/posts (2674 words)

	Medical College of Wisconsin - Publications
		Mett and J. Taylor, "Steady-state dynamo and current drive in a nonuniform bounded plasma," Phys.
		Mett and J. Tataronis, "Current drive via injection of wave helicity," in Theory of Fusion Plasmas, Proceedings of the Joint Varenna-Lausanne International Workshop, Varenna, Italy, 1990, edited by J. Vaclavik, F. Troyon, and E. Sindoni (Editrice Compositori Società Italiana di Fisica, Bologna, 1990), pp.
		Mett and J. Tataronis, "Current drive via magnetohydrodynamic helicity waves in a nonuniform plasma," Phys.
	www.mcw.edu /display/router.asp?docid=3260 (759 words)

	Evil Mad Scientist Laboratories - Three magnetohydrodynamic propulsion projects
		Today we're publishing three articles on magnetohydrodynamic (MHD) propulsion, a means of propelling a ship without moving parts like paddlewheels or propellers.
		Finally Get serious, and start hacking magnetohydrodynamic propulsion systems into RC boats.
		Neatorama » Blog Archive » DIY Magnetohydrodynamic Drive.
	www.evilmadscientist.com /article.php/MHDOverview (261 words)

	Research and Development
		Sometimes it is a complete waste, like when players try to develop Warp Drive or Giant Squeaky Ducks to be their navy's new flagship.
		Magnetohydrodynamic Drive (Also known as Caterpillar Drive and M-Drive)
		Subs with this drive system have "CD" added to their designation, for example, a SSN with this drive system is an SSNCD.
	members.aol.com /SimnJestr/research.html (1352 words)

	Lego Set Review: 6115 - Shark Scout (Site not responding. Last check: 2007-11-05)
		Of course having just been on a top-secret mission to record classified Aquanaut data, even the smallest things had him shaking in his dive boots.
		With this magnetohydrodynamic drive-powered sub he piloted, not one Aquanaut ship could outrun him...or so he thought...
		I know, I know, if a sub has magnetohydrodynamic drive, it wouldn't need a propeller.
	www.adequate.com /lego/reviews/Details/17.html (309 words)

	QUIZ TEMPLATE -- Submissions come by email (File "quizbymail.htm") (Site not responding. Last check: 2007-11-05)
		When you are satisfied with your responses, click the SUBMIT QUIZ button at the bottom of this page.
		The dead-quiet "caterpillar drive" for submarines in the movie The Hunt for Red October is based on a magnetohydrodynamic (MHD) drive: as the ship moves forward, seawater flows through multiple channels in a structure built around the rear of the hull.
		The electric field drives a current across the channel and through the water; the magnetic force on the current propels the water toward the rear of the channel, thus propelling the ship forward.
	www.physics.isu.edu /~keeter/phys212_af99/quiz24/quizbymail.htm (375 words)

	Tesla_Downunder
		For more photos of sparks up to 8 feet (around half a million volts) go to Tesla coil sparks.
		Above left is my magnetic levitation display running, centre is hydrogen/chlorine ignition at the back of my model boat with magnetohydrodynamic drive and right is the bizarre ferrofluid.
		On the left above is my home made Nitrogen laser with the beam in Fluorescein.
	members.iinet.net.au /~pterren (817 words)

	Piw -> Attack/Patrol Submarines (Site not responding. Last check: 2007-11-05)
		Propulsion: 2 x PebbleBed nuclear reactors with pumpjet propulsion; 1 x magnetohydrodynamic (MHD) drive for silent running.
		Each reactor surrounded by thermal insulation to reduce infared and noise emissions; 1 x Electrical Induction Propellor Assembly (with no shaft) in an Acoustically Dampened Housing.
		Speed: 14 knots on MHD drive; 28 knots surfaced; 39 knots submerged
	s14.invisionfree.com /PIW/index.php?showtopic=7 (453 words)

	Co-Chairs: J. Frank (LSU-Baton Rouge) & C. Gammie (Urbana-Ch.), 3a) What Hydro and Magnetohydrodynamic Processes ...
		Co-Chairs: J. Frank (LSU-Baton Rouge) and C. Gammie (Urbana-Ch.), 3a) What Hydro and Magnetohydrodynamic Processes Drive Accretion onto Black Holes?
		3a) What Hydro and Magnetohydrodynamic Processes Drive Accretion onto Black Holes?
		To begin viewing slides, click on the first slide below.
	online.itp.ucsb.edu /online/bhole_c99/frank (71 words)

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