thrust coefficient, CF


ECSS-E-ST-35C Rev. 1


ratio of the thrust integrated over an appropriate time interval divided by the integral over the same time interval of the product of throat area and throat total pressure


  • NOTE 1 In accordance with this definition, the average thrust coefficient can be calculated as: In many cases, t1 is taken to be the ignition time, t0,and t2 is taken the time at burnout (te). In this case, t2 - t1 = tb and the integral of the thrust becomes the total impulse.
  • NOTE 2 Instantaneous and average thrust coefficients are usually referred to as thrust coefficient
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