The Mechanical
Engineering Handbook




Specific Excess Power Calculator


















How This Is Calculated



$$ P_S = \frac{V}{W} (T-D) $$ where:

Ps   =   Specific excess power   (m/s)

V   =   Aircraft airspeed velocity   (m/s²)

W   =   Aircraft weight   (N)

T   =   Thrust force   (N)

D   =   Drag force   (N)


Assumptions



  • Thrust and drag forces remain constant.
  • Flight is in steady-state.
  • Airspeed remains constant.
  • There is no wind.
  • The aircraft follows a straight path.

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