specific impulse
noun Date: 1947 the thrust produced per unit rate of consumption of the propellant that is usually expressed in pounds of thrust per pound of propellant used per second and that is a measure of the efficiency of a rocket engine

New Collegiate Dictionary. 2001.

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  • Specific impulse — (usually abbreviated I sp) is a way to describe the efficiency of rocket and jet engines. It represents the impulse (change in momentum) per unit of propellant. The higher the specific impulse, the less propellant is needed to gain a given amount …   Wikipedia

  • specific impulse — noun : the thrust produced per unit rate of consumption of the propellant usually specified in pounds of thrust per pound of propellant used per second and forming a measure of the efficiency of performance of a rocket engine * * * Rocketry. 1. a …   Useful english dictionary

  • specific impulse — Rocketry. 1. a measure, usually in seconds, of the efficiency with which a rocket engine utilizes its propellants, equal to the number of pounds of thrust produced per pound of propellant burned per second. 2. the specific impulse that a given… …   Universalium

  • specific impulse — noun The ratio of the thrust produced by a rocket or other jet engine to the rate of use of propellant …   Wiktionary

  • specific impulse — specif′ic im′pulse n. rkt a measure of how efficiently a rocket engine burns its fuel • Etymology: 1945–50 …   From formal English to slang

  • specific impulse — /spəˌsɪfɪk ˈɪmpʌls/ (say spuh.sifik impuls) noun Aeronautics a measure of the efficiency of a rocket propellant in terms of the ratio of the thrust produced to the rate of consumption …   Australian English dictionary

  • Variable Specific Impulse Magnetoplasma Rocket — Artist s impression of several VASIMR engines propelling a craft through space The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro magnetic thruster for spacecraft propulsion. It uses radio waves to ionize and heat a… …   Wikipedia

  • System-specific impulse — The term System specific Impulse, I ssp is mostly used to describe the performance of jet propulsion systems. A reference number is introduced, which defines the total impulse, I tot, delivered by the system, divided by the system mass, m PS: I… …   Wikipedia

  • Variable Specific Impulse Magnetoplasma Rocket — Illustration eines Magnetoplasmadynamischen Antriebs. Ein Magnetoplasmadynamischer Antrieb, auch MPD Antrieb (engl. MPD Drive) genannt, ist ein bis jetzt nur in Prototypform realisierter und bisher erst auf dem Boden getesteter… …   Deutsch Wikipedia

  • Variable specific impulse magnetoplasma rocket — VASIMR Illustration d un vaisseau interplanétaire futuriste à propulsion électromagnétique à plasma VASIMR VASIMR, acronyme de Variable specific impulse magnetoplasma rocket[1] : « Fusée magnétoplasma à impulsion spécifique… …   Wikipédia en Français

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