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Topic: Tripropellant rocket

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	Rocket Encyclopedia Article @ Deserted.org (Site not responding. Last check: 2007-10-31)
		Rockets are used to accelerate, change orbits, de-orbit for Constantinople, for the whole landing if there is no atmosphere, e.g., for landing on the edit, and sometimes to soften a hard parachute landing immediately before touchdown (see hydrogen).
		After the war, rockets were used to study high-altitude conditions, by radio models of temperature and pressure of the atmosphere, detection of propellant, and further research.
		Rockets became extremely important militarily in the form of Stalinist purges (ICBMs) when it was realised that d carried on a rocket vehicle were essentially not defensible against once launched, and they became the delivery platform of choice for these weapons.
	www.deserted.org /encyclopedia/Rocket (3464 words)

	Bangla Forum (Site not responding. Last check: 2007-10-31)
		Rockets are used to accelerate, change orbits, de-orbit for landing, for the whole landing if there is no atmosphere, e.g., for landing on the Moon, and sometimes to soften a hard parachute landing immediately before touchdown (see Soyuz spacecraft).
		Rockets must be used when there is no other substance (land, water, or air) or force (gravity, magnetism, light) that a vehicle may employ for propulsion, such as in space.
		Rockets became extremely important militarily in the form of intercontinental ballistic missiles (ICBMs) when it was realised that nuclear weapons carried on a rocket vehicle were essentially not defensible against once launched, and they became the delivery platform of choice for these weapons.
	www.banglaforum.com /encyclopedia.html?title=Rocket (3251 words)

	Rocket - Wiki (Site not responding. Last check: 2007-10-31)
		There are many different types of rockets, and a comprehensive list can be found in spacecraft propulsion- they range in size from tiny models such as water rockets or small solid rockets that can be purchased at a hobby store, to the enormous Saturn V used for the Apollo program.
		Modern rockets were born when, after receiving a grant in 1917 from the Smithsonian Institution, Robert Goddard attached a supersonic (de Laval) nozzle to a rocket engine's combustion chamber.
		Rockets became extremely military important in the form of intercontinental ballistic missiles (ICBMs) when it was realised that nuclear weapons carried on a rocket vehicle were essentially not defensible against once launched, and they became the delivery platform of choice for these weapons.
	www.lumrix.com /help/index.php/Rocketry (3072 words)

	Tripropellant rocket - Wikipedia, the free encyclopedia
		A tripropellant rocket is a rocket that uses three propellants.
		The other kind of tripropellant rocket is one that uses one oxidizer but two fuels, switching between the two in mid-flight.
		SSTO rockets could simply carry two sets of engines, but this would mean the spacecraft would be carrying one or the other set "turned off" for most of the flight.
	en.wikipedia.org /wiki/Tripropellant_rocket (837 words)

	Rocket - Engineering - A Wikia wiki
		A rocket is a vehicle, missile or aircraft which obtains thrust by the reaction to the ejection of fast moving exhaust gas from within a rocket engine.
		There are many different types of rockets, and a comprehensive list can be found in spacecraft propulsion- they range in size from tiny models that can be purchased at a hobby store, to the enormous Saturn V used for the Apollo program.
		Modern rockets were born when, after receiving a grant in 1917 from the Smithsonian Institution, Robert Goddard attached a de Laval nozzle to a rocket engine's combustion chamber, doubling the thrust and enormously raising the efficiency, giving birth to the real possibility of practical space travel.
	engineering.wikia.com /wiki/Rocket (2687 words)

	Liquid tripropellant rocket engine coaxial injector - Patent 6185927
		A tripropellant coaxial pintle injector for a rocket engine which enables smooth transitioning between two types of propellants that are adapted to be alternatively mixed with a third type of propellant in a combustion chamber of a rocket engine.
		Bipropellant rocket engines are known which combine a single oxidizer propellant with a single fuel propellant in a combustion chamber in a rocket engine to form a combustion reaction to produce thrust.
		Briefly, the present invention relates to a tripropellant coaxial pintle injector for a rocket engine which enables smooth transitioning between two types of propellants that are adapted to be alternatively mixed with a third type of propellant in a combustion chamber of a rocket engine.
	www.freepatentsonline.com /6185927.html (1927 words)

	PowerPedia:Spacecraft propulsion - PESWiki
		Rocket engines take their reaction mass from one or more tanks and form it into a jet, obtaining thrust in accordance with Newton's third law.
		Rockets emitting plasma can potentially carry out reactions inside a magnetic bottle and release the plasma via a magnetic nozzle, so that no solid matter need come in contact with the plasma.
		The speed ratio of a rocket nozzle is mostly determined by its area expansion ratio—the ratio of the area of the throat to the area at the exit, but details of the gas properties are also important.
	peswiki.com /index.php/PowerPedia:Spacecraft_propulsion (4054 words)

	Tripropellant rocket engine - Patent 4771600
		A liquid rocket engine as claimed in claim 2 including a heat exchanger for placing pressurized hydrogen in indirect heat-exchange relationship with super-heated hydrogen bled from said passages and means for leading the then heated pressurized hydrogen into said injector for being directly injected into said combustion chamber.
		Historically, tripropellant liquid rocket engines have utilized H.sub.2 to cool the thrust chamber and burn in the gas generator but theretofore the H.sub.2 has never been used or considered for use in the main combustion chamber.
		The judicious use of hydrogen permits the cooling of the rocket chamber as is accomplished in the RL10 engine manufactured by Pratt & Whitney Aircraft division of United Technologies Corporation which is the assignee of this patent application, and avoids the coking problem that would occur if the HC was used as a coolant.
	www.freepatentsonline.com /4771600.html (2460 words)

	ipedia.com: Spacecraft propulsion Article (Site not responding. Last check: 2007-10-31)
		In a conventional solid fuel rocket, the fuel is burned, providing the energy, and the reaction products are allowed to flow out the back, providing the reaction mass.
		can be calculated using the rocket equation, where M is the mass of fuel, P is the mass of the payload (including the rocket structure), and is the specific impulse of the rocket.
		Rockets emitting gases are limited by the fact that their exhaust temperature cannot be so high that the nozzle and reaction chamber are damaged; most large rockets have elaborate cooling systems to prevent damage to either component.
	www.ipedia.com /spacecraft_propulsion_1.html (2670 words)

	Tripropellant rocket (Site not responding. Last check: 2007-10-31)
		His last full study was on Orbital Rocket Airplane which used both tripropellant and (in versions) a plug nozzle resulting in a only slightly larger than an Lockheed SR-71 able to operate from traditional runways.
		ROCKET TO RUSSIA was released in mid-1977, at the height of the fury that was known as Punk Rock.
		Rocket Man is already one of my favorite songs and instead of doing a crappy remix of the original version, Daphne Rubin-Vega (the original Mimi from RENT) signed on to add her distinct voice and immense talent to this recording.
	www.freeglossary.com /Tripropellant_rocket (1038 words)

	Spacecraft propulsion - Engineering - A Wikia wiki
		All current spacecraft use chemical rocket engines (bipropellant or solid-fuel) for launch, though some (such as the Pegasus rocket and SpaceShipOne) have used air-breathing engines on their first stage.
		The reaction mass is then allowed to escape from the rear of the vehicle by passing through a nozzle, which dramatically accelerates the reaction mass, converting thermal energy into kinetic energy.
		The speed ratio of a rocket nozzle is mostly determined by its area expansion ratio—the ratio of the area of the throat to the area at the exit.
	engineering.wikia.com /wiki/Spacecraft_propulsion (3270 words)

	History and Development of the Rocket Engine
		Since a rocket must carry all its reaction mass with it, most of the first reaction mass goes towards accelerating reaction mass rather than payload.
		The speed ratio of a rocket nozzle is mostly determined by it's area expansion ratio- this is the ratio of the area of the throat to the area at the exit.
		Rockets can use ablative materials that erode in a controlled fashion, or very high temperature materials, such as graphite, ceramics or certain exotic metals.
	www.edinformatics.com /inventions_inventors/rocket_engine.htm (3031 words)

	Tysk-Skandinaviske Rum Compagnie - IBWiki
		It was an association of amateur rocket enthusiasts active in the Holy Roman Empire, and which pioneered the development of liquid fueled rockets.
		In late 2004 a rocket was launched from Gadangmeland carrying two negrito cosmonauts who were safely returned to Earth, one parachuting from space and the other riding the Rumgleiter back to safety on Earth.
		This tripropellant engine is basically two engines in one, with a common engine core within the engine bell, combustion chamber and oxidizer pump, but two fuel pumps and feed lines.
	ib.frath.net /w/Tysk-Skandinaviske_Rum_Compagnie (1325 words)

	ROBERT SALKELD’S (Site not responding. Last check: 2007-10-31)
		The new carrier aircraft would have been boosted by its rocket propulsion system to an altitude of 18.5km and a flight-path angle of 45 degrees before releasing the spaceplane from an under-wing position.
		Salkeld used it as a starting point for his own tripropellant HTHL SSTO analyses and also published some preliminary trade studies on the merits and drawbacks of vertical vs. horizontal launch/landing for single-stage-to-orbit vehicles.
		The orbital rocket airplane's polar payload capability would increase to 7.7t if a launch sled were used.
	www.abo.fi /~mlindroo/SpaceLVs/Slides/sld039.htm (1969 words)

	INTRODUCTION TO FUTURE LAUNCH VEHICLE PLANS (Site not responding. Last check: 2007-10-31)
		Salkeld argued that "tripropellant" rocket propulsion would be more efficient and reduce the total gross liftoff weight by 25%, finally making VTHL SSTO feasible.
		JSC initially favored an enormous two-stage VTVL rocket capable of launching 700t payloads, but there were concerns about landing safety so the 1977 baseline was a smaller VTHL TSTO with 50% reduced payload capability (fig.
		Most of the aforementioned concepts (and Martin Marietta's VTHL TSTO concept from 1977) utilized the tripropellant propulsion concept in order to reduce the size of the vehicle.
	www.abo.fi /~mlindroo/SpaceLVs/Slides/sld001.htm (2689 words)

	Space Technology - IBWiki
		Germany shocked the world when it was the first country to launch an artificial satellite around the Earth, which it had secretly launched somewhere in the Crimea sometime in the spring of 2002.
		Louisianne and Japan are dependent on the Sarutahico series of rockets developped by Miçubixi Aeronautics, using similar propulsion to the TSRC, although the main booster carrying a LH/LOX mix.
		Almost two weeks later, on the 23rd, a manned VTHL (vertical-take-off-horizontal-landing) version of the tripropellant rocket was successfully launched, carrying two Andamese testæronauts, Georg Aleksandersen Gagadie and Josef Petersen Quitinga, into suborbit, and making them the first cosmonauts.
	ib.frath.net /w/Space_Technology (1175 words)

	Winged
		This was certainly a good alternative the SSTO ballistic designs, which relied on rocket thrust to hover and make a safe landing.
		The rocket-powered Messerschmitt Me-163 was the world's first and only operational pure rocket fighter and represented the culmination of Alexander Lippisch's years...
		A rocket propelled sled would be used for horizontal launch of delta-winged,...
	www.astronautix.com /lvfam/winged.htm (1438 words)

	System 49-M
		The system would have a 770 tonne gross takeoff mass.
		The tripropellant single rocket stage was equipped 1 x NK-43 / 11D112 engine burning Lox/Kerosene and 2 x RD-57 / 11D57 engines burning Lox/LH2.
		The orbiter could have one or two crew, and was designed for 100 reuses.
	www.astronautix.com /craft/sysem49m.htm (201 words)

	Rocket information - Search.com
		synonyms: rocket, roquette, garden rocket, rocket salad, arugula, Eruca sativa, Eruca vesicaria sativa
		Arts > Music > Bands and Artists > R > Rocket from the Crypt (4)
		The origin of rockets dates back over 2,000 years ago when people of the Han Dynasty in china (c.
	domainhelp.search.com /reference/Rocket (3241 words)

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