Keywords |
  • Physics

Specific impulse

Specific impulse is the ratio of the thrust delivered by a rocket engine, expressed in newtons, to the flow rate multiplied by the weight of ejected propellant.

It is expressed in seconds and represents the time during which 1 kg of propellant is capable of producing a force of 9.81 newtons. For example, for the pair H2-02 it is equal to between 430 and 480 seconds.



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