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An aircraft is flying between two points with a distance of 130 NM. If the trip fuel is 8.5 USG and the fuel flow is 6.5 USG/hr, what is the aircraft's groundspeed?

  • A

    85 kt

  • B

    90 kt

  • C

    110 kt

  • D

    100 kt

Calculating the groundspeed
Before calculating the groundspeed, we must first determine the flight time using the trip fuel and the given fuel flow.

Step 1: Calculate the flight time

  • Flight time (hr) = Trip Fuel (USG) / Fuel flow (USG/hr)
  • Flight time = 8.5 USG / 6.5
  • Flight time = 1.3 hr

Step 2: Calculate the groundspeed (GS)

  • Groundspeed (kt) = Distance (NM) / Flight time (hr)
  • Groundspeed = 130 kt / 1.3 hr
  • Groundspeed = 100 kt

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