Loiter Weight Fraction Calculator

The loiter weight fraction in flight mechanics represents the proportion of remaining usable fuel weight compared to the initial takeoff weight during an aircraft’s loiter or endurance phase. It is a crucial metric for assessing the efficiency and duration an aircraft can sustain flight before needing to return for refueling. The formula to calculate the loiter friction fraction as follows:

Where:

  • E is the endurance in sec
  • C is the specific fuel consumption in kg/Ws.
  • (L/D)max is the Max lift-to-drag ratio.
  • Floiter jet is the Loiter Weight fraction.

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