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.
Performance alterations such as increasing the combustion-chamber pressure can significantly enhance specific impulse and payload capacity.
Space engines with higher specific impulse will sense new science from deep space exploration quicker.
Summary: The general right of Palestinians to resist occupation is enshrined in international law, and the specific impulse to avenge the past week's atrocities in the Gaza Strip is perfectly understandable, but those who exercise these prerogatives have a responsibility to choose targets that will not undermine their cause.
Experts say you can create a specific impulse, which in yogic flying is to lift the body into the air.
JSC's Advanced Space Propulsion Lab has been working on the technology, known as the Variable Specific Impulse Magnetoplasma Rocket (VASIMR).
This would be a leaky mirror, and some of the fragments would escape out the end--at least 50 percent, and Chapline hopes possibly 90 percent--producing a thrust that could have a specific impulse up to 1 million seconds.
For these reasons it is important to determine not only the performance such as specific impulse (Isp), density specific impulse ([rho]Isp), and ignition delay of TEA with a given oxidizer, but also the effect a solvent has on the system.
The RL10B-2 is a unique cryogenic upper-stage engine that provides 465 seconds of specific impulse and 24,750 pounds of thrust.
The Variable Specific Impulse Magnetoplasma Rocket -- or VASIMR -- could cut space travel time by nearly a sixth of the time currently required.

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