The Mechanical Engineering Handbook



Propeller Thrust

Propeller Thrust Equation



$$ T = \dot{m}v_e - \dot{m} v_0 $$ where:

T   =   Thrust (N)

ṁ   =   Mass flow rate through propeller   (kg/s)

ve   =   Exit velocity of airflow   (m/s)

v0   =   Inflow (freestream) velocity   (m/s)


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Equation Assumptions



  • The system is in steady flow.
  • Fluid is incompressible.
  • Flow is one-dimensional .
  • The fluid behaves as an ideal gas.
  • Frictional losses are negligible.