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Determine the new VS, given the following information: An airplane of 305 t and a VS of 175 kt departs with 75 t of fuel aboard. Upon landing there is 8.5 t of fuel remaining.
  • A
    155 kt
  • B
    175 kt
  • C
    137 kt
  • D
    173 kt
Use the following equation:
VS NEW = VS OLD x √(New Mass ÷ Old Mass)
  • Fuel burnt = 75 t - 8.5 t = 66.5 t
    New Mass = 305 t - 66.5 t = 238.5 t
  • VS NEW = 175 x √(238.5 ÷ 305)
    VS NEW = approx. 155 kt

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