: 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 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 combination of propellants would produce in an ideal rocket engine providing complete combustion, no friction losses, and no lateral expansion of the exhaust.[1945-50]
* * *specific impulse nounA measure of the efficiency of a rocket engine, the ratio of the thrust obtained to the fuel consumed, usu per second• • •Main Entry: ↑specify
* * *specific impulse,the thrust in pounds of a rocket motor or engine produced by burning one pound of a specified fuel with its oxidizer in one second.
Useful english dictionary. 2012.
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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 — 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 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
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
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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
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