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Refer to figure.
Given the following information and based on the actual time overhead and actual fuel at B, what will be the Estimated Time of Overflight (ETO) and estimated remaining fuel at waypoint C?

  • A
    ETO 15:40, and estimated remaining fuel 1775 lb.
  • B
    ETO 15:45, and estimated remaining fuel 1850 lb.
  • C
    ETO 15:40, and estimated remaining fuel 1850 lb.
  • D
    ETO 15:45, and estimated remaining fuel 1775 lb.
  • (1) Calculate the actual fuel consumption: Departure - B
Fuel consumed Departure - B = Fuel at Departure - Actual Fuel Remaining at B
3000 lb – 2300 lb = 700 lb
Time Departure – B = 15:10 - 14:30 = 40 min
Fuel Consumption = 700 lb / 40 min = 17.5 lb/min
  • (2) Calculate Ground Speed: Departure - B
Distance: 200 NM
Flight time: 40 min
200 NM / 40 min x 60 = 300 kt
  • (3) Calculate flight time Time and fuel consumed: B-C
Distance: 150 NM
Ground Speed: 300 kt
Flight Time B-C = 150 NM / 300 kt = 30 min
Fuel Consumed = 17.5 lb/min x 30 min = 525 lb
  • (4) Calculate ETO C and Estimated fuel overhead C
ETO = ATO B + Flight time B-C = 15:10 + 30 min = 15:40
Estimated Fuel over C = 2300 lb - 525 lb = 1775 lb

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