Specific Impulse

Specific impulse (usually abbreviated as Isp) is a measure of the efficiency of rocket and jet engines. It is defined as the thrust produced per unit of propellant consumed per unit of time. In other words, it is the change in momentum per unit of propellant. Specific impulse is a crucial parameter in rocketry because it determines the maximum velocity that a rocket can achieve. The higher the specific impulse, the greater the rocket's efficiency and the faster it can travel. Specific impulse is usually measured in seconds and is a function of the engine design and the propellant used.
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