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If the aircraft’s fuel consumption is 9 imperial gallons per hour, how much fuel will be needed to cover a distance of 95 NM at a ground speed of 85 knots?

  • A

    38 litres

  • B

    41 litres

  • C

    42 litres

  • D

    46 litres

1) Time en-route

  • T = distance ÷ groundspeed
  • T = 95 NM ÷ 85 kt = 1.1176 h (1 h 07 min)

2) Fuel in imperial gallons

  • F (imp gal) = F x T = 9 imp gal/h x 1.1176 h = 10.06 imp gal

3) Convert to litres

  • Imperial Gallons to Litres (l) => Litres = Imp. Gal × 4.546

F (litres) = 10.06 x 4.546 = 45.7 L = 46 L

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