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An aircraft is executing a VFR flight with a final reserve fuel of 20 USG. At a checkpoint of the route, the remaining fuel is 80 USG and the remaining planned flight time 2 h 20 min. What is the maximum fuel flow (FF) that can be used until the destination?

  • A

    FF = 8.6 USG/h

  • B

    FF = 42.9 USG/h

  • C

    FF = 25.7 USG/h

  • D

    FF = 34.3 USG/h

The remaining usable fuel is 80 USG and the reserve fuel is 20 USG. The aircraft should land with its reserve fuel intact, which means that it can consume:

  • Fuel that can be used = 80 USG - 20 USG = 60 USG

The remaining flight time is 2hr 20 min and the aircraft can burn a maximum of 60 USG. This means that the maximum fuel consumption will be:

  • Maximum FF = 60 USG / 2 hr 20 min = 25.7 USG/hr

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