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Refer to figure or CAP698 file 3.3.
TORA: 2200 ft
TODA: 2200 ft
ASDA: 2200 ft
Runway surface: paved
Runway condition: dry
Runway slope: 2.0% up
Aerodrome pressure altitude: 4000 ft
Aerodrome temperature: +10°C
Tailwind component: 5 kt

Given the following information, what is the Field Length Limited Take-Off Mass?

  • A
    3800 lb
  • B
    4250 lb
  • C
    4750 lb
  • D
    4600 lb

Refer to figure.
CAP 698 – Take-Off

Field Length Requirements
a) When no stop way or clearway is available the take-off distance when multiplied by 1.25 must not exceed TORA.
b) When a stopway and/or clearway is available the take-off distance must:

  1. not exceed TORA
  2. when multiplied by 1.3, not exceed ASDA
  3. when multiplied by 1.15, not exceed TODA

c) If the runway surface is other than dry and paved the following factors must be used when determining the take-off distance in a) or b) above:

Surface type Condition Factor
Grass (on firm soil) up to 20 cm. Long Dry x 1.2
Wet x 1.3
Paved Wet x 1.0

d) Take-off distance should be increased by 5% for each 1% upslope. No factorisation is permitted for downslope.

NOTE: The same surface and slope correction factors should be used when calculating TOR or ASD.

TORA ASDA TODA
Given Distances 2200 ft 2200 ft 2200 ft
Slope Factor 1.1 1.1 1.1
Surface/Condition Factor 1.0 1.0 1.0
Regulation Factor 1.25 1.25 1.25
De-factored Distance 1600 ft 1600 ft 1600 ft
TORA = ASDA = TODA, means no clearway or stopway available. Regulation factor =1.25.

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