What is Isp?

Specific Impulse (Isp) specifies the specific thrust of a rocket motor, measured in thrust per unit mass per second (typically in seconds). It is used to evaluate the performance of a rocket motor.


Factors Affecting Isp:

Fuel Type: Different types of fuels exhibit varying Isp values. For example, liquid hydrogen and liquid oxygen are among the fuels with the highest Isp values.
Motor Design: The design of the motor directly influences how efficiently the fuel is burned and converted into thrust.


Advantages of High Isp:

  • Achieving higher thrust with less fuel consumption.
  • Enabling rockets to reach higher orbits and longer distances.


Disadvantages of Low Isp:

  • Increased fuel consumption.
  • Limiting the rocket’s capability to reach lower orbits and shorter distances.

References & Further Reading

  1. DUTlab, DUTlab VENÜS Project, 2021


Rocket Fx Wiki is a DUTlab Project.
July 2024 – All rights reserved.

Scroll to Top