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Refer to figure.
Given the following information, what will be the remaining range and endurance from waypoint B when preserving Holding and Final Reserve Fuel of 1200 lb?
  • A
    900 NM, and 03:00 h.
  • B
    500 NM, and 01:40 h.
  • C
    533 NM, and 01:36 h.
  • D
    964 NM, and 02:54 h.
(1) Calculate Flight time from Departure - "B":
ATO Departure: 2000
ATO "B": 2045
  • Flight time: 45 min
(2) Calculate Fuel Flow:
Actual Fuel - Departure: 3400
Actual Fuel - "B": 2700
  • 700 lb of fuel consumed in 45 min = 700 lb / 45 min = 933 lb/h
(3) Calculate Endurance and Range:
  • Calculate Endurance Fuel available (preserving 1200 lb of fuel):
    Fuel for endurance: 2700 - 1200 (final reserve) = 1500 lb
    Endurance = 1500 lb : 933 lb/h = 1.6 h = 1 h 36 min
  • Calculate Ground Speed:
    GS = 250 NM / 45 min = 333 kts
    Range = Endurance x GS = 1.6 h x 333 = 533 NM

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