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A Class B light twin aeroplane is to take-off on a Commercial Air Transport flight from an airfield with data as given below. What is the de-factored take-off distance that should be used to determine the maximum take-off mass from the gross-take-off performance graph produced for a level, paved and dry runway?

TORA: 1270 ft
Clearway: 385 ft
Stopway: 215 ft
Upslope: 1.3% (5% extra distance required for every 1% of upslope)
Runway surface: paved and dry

  • A
    1073 ft
  • B
    1175 ft
  • C
    954 ft
  • D
    933 ft

Slope correction: 5 x 1.3 = 6.5%

TORA TODA ASDA
Distances 1270 1655 1485
Slope factor 1.065 1.065 1.065
Regulation factor 1.00 1.15 1.3
Surface factor 1.00 1.00 1.00
De-factored distance 1192 1351 1072

Lowest value: 1072 ft

Note: Question asks for the de-factored take off distance.

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