14 Facts About Rocket engine


Rocket engine uses stored rocket propellants as the reaction mass for forming a high-speed propulsive jet of fluid, usually high-temperature gas.

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For example, if an Rocket engine producing 100 pounds of thrust runs for 320 seconds and burns 100 pounds of propellant, then the specific impulse is 320 seconds.

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Maximum efficiency for a rocket engine is achieved by maximising the momentum contribution of the equation without incurring penalties from over expanding the exhaust.

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Rocket engine nozzles are surprisingly efficient heat engines for generating a high speed jet, as a consequence of the high combustion temperature and high compression ratio.

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Rocket engine nozzles give an excellent approximation to adiabatic expansion which is a reversible process, and hence they give efficiencies which are very close to that of the Carnot cycle.

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Materials technology, combined with the engine design, is a limiting factor in chemical rockets.

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Also, when the vehicle is moving slowly, little of the chemical energy input to the engine can go into increasing the kinetic energy of the rocket .

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Rocket engine vehicles have a reputation for unreliability and danger; especially catastrophic failures.

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The Pratt and Whitney RL10 Rocket engine, used in a cluster of six in the Saturn I second stage, had no catastrophic failures in 36 Rocket engine-flights.

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Space Shuttle Solid Rocket Booster, used in pairs, caused one notable catastrophic failure in 270 engine-flights.

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Rocket engine propellants require a high energy per unit mass, which must be balanced against the tendency of highly energetic propellants to spontaneously explode.

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The Rocket engine thrust is directly related to the surface area of the solar collector and to the local intensity of the solar radiation and inversely proportional to the Isp.

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Rocket engine was the first to develop the Tsiolkovsky rocket equation, though it was not published widely for some years.

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Rocket engine calculated from his independently derived rocket equation that a reasonably sized rocket, using solid fuel, could place a one-pound payload on the Moon.

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