Discussion
Arrange the takeoff phases that the constraint diagram's takeoff and climb lines represent, in flight order:
1. Ground roll to lift-off speed
2. Rotation and initial climb to screen height
3. Second segment climb with gear retracted
4. Acceleration and flap retraction
Select the correct sequence.
Answer: C
Correct answer: 1, 2, 3, 4
The phases follow the flight path. The aircraft accelerates along the runway in the ground roll to lift-off speed (1); it rotates and climbs to the screen height, which completes the certificated takeoff distance (2).
With the gear retracted it flies the second segment at V2 to 400 feet, holding the required gradient with an engine failed (3). Only above that height does it accelerate and retract the flaps (4). The takeoff field length constraint covers the first two phases and the second segment climb constraint the third, which is why they appear as separate lines.
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