specific impulse


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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

specif′ic im′pulse


n.
a measure of how efficiently a rocket engine burns its fuel.
[1945–50]
Translations
impulsion spécifique
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References in periodicals archive ?
Had hydrogen been used instead of helium, the company said the specific impulse achieved would have been above the 600s threshold required for single-stage-to-orbit operations of a launch vehicle, which is not possible with chemical rockets.
The oxidiser: fuel (O:F) ratio moved closer to the target and a specific impulse of 220 sec was achieved on firing number five.
Furthermore, AFIT performance calculations indicate that matching or improving the specific impulse of the RL-10B2 results in a minimum stage-weight savings of 105 pounds due to the reduced estimated weight of the DEAN.
The RL10B-2 is a unique cryogenic upper-stage engine that provides 465 seconds of specific impulse and 24,750 pounds of thrust.
A GDM engine, Emrich said, would have a specific impulse of around 100,000 seconds.
The book provides derivations of basic thruster equations (like the rocket equation, thrust, specific impulse, efficiency, etc.
This propulsion system of the future has now become a reality with Airbus Defense and Space s Radio Frequency Ion Technology (RITA), which provides a specific impulse ten to twenty times higher than today's best performing liquid propellant rocket engines.
Merlin 1C in its Falcon 9 first stage configuration has a thrust at sea level of 95,000 lbs, a vacuum thrust of over 108,000 pounds, vacuum specific impulse of 304 seconds and sea level thrust to weight ratio of 92.
An Umbrella Space Act Agreement has been inked between Ad Astra Rocket Company and the National Aeronautics and Space Administration (NASA) to continue their partnership in the development of the Variable Specific Impulse Magnetoplasma Rocket engine (VASIMR(R)).
Specific Impulse to Become Key Part of Crimson's Interactive Services Business Unit
The test campaign will experimentally investigate the propulsive performance of the system in terms of specific impulse, minimum impulse bit and thrust modulation.
The RL10B-2 is a cryogenic upper-stage engine that provides 465 seconds of specific impulse and 24,750 pounds of thrust.

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