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Refer to figure.
Give the following conditions, calculate the landing distance for a multi-engine piston aeroplane:
Temperature (OAT): 0°C
Pressure altitude (PA): 2 000 ft
Aircraft mass: 4 000 lbs
Headwind: 5 kt
Barrier speed: 85 kt
  • A
    1120 ft
  • B
    2320 ft
  • C
    2420 ft
  • D
    3320 ft

Refer to figure.

(1) Enter at the ambient temperature of 0ºC. Move vertically to the aerodrome pressure altitude of 2000 ft.
(2) From this point, move horizontally right to the landing mass reference line. Parallel the grid lines to the appropriate landing mass input of 4000 lbs.
(3) Continue from this intersection to the wind component reference line. Parallel the grid line to the appropriate wind component input of 5 kt headwind.
(4) Travel horizontally right to the ground roll reference line. Continue parallel to the grid lines to the right vertical axis to read the graphical distance: 2320 ft.

Note: It is not necessary to apply the regulatory factor to the landing distance since the question does not ask for the landing distance required. Furthermore, you do not need to make any calculations with the provided "Barrier Speed" - you can easily track upwards from the mass reference.

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