Principles of Flightmedium#594
Taking off in ground effect can be hazardous because:
A
The aircraft will not lift off
B
The aircraft may become airborne at a speed below the normal stall speed and then lose lift when climbing out of ground effect
CorrectC
Ground effect increases drag
D
Engine power is reduced near the ground
Explanation
The aircraft may lift off prematurely due to ground effect but may not have enough speed to sustain flight once out of ground effect.
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