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specific impulse

   Also found in: Acronyms, Encyclopedia, Wikipedia 0.02 sec.
specific impulse
n.
A performance measure for rocket propellants that is equal to units of thrust per unit weight of propellant consumed per unit time. Also called specific thrust.
specific impulse
n
(Astronautics) the ratio of the thrust produced by a rocket engine to the rate of fuel consumption: it has units of time and is the length of time that unit weight of propellant would last if used to produce one unit of thrust continuously


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