The take-off length of an aircraft is determined by the stall speed, as the aircraft can take-off

Question

slightly above that speed, and the combination of maximum thrust, aerodynamic drag and rolling
friction drag of the wheels, which determine the maximum acceleration level.
Which of following factors help you in shortening the take-off roll? Multiple answers can be
correct.
A) High ambient temperature (warm day)
B) Low altitude runway
C) Low ambient temperature (cold day)
D) High altitude runway
E) Maximum take-off weight
F) Minimum aircraft weight
G) High-lift devices
H) Large wing surface area
I) Small wing surface area

Answer 1

To shorten the take-off roll of an aircraft, the following factors would be beneficial:

B) Low altitude runway - Lower altitude means denser air, which generally provides better aerodynamic performance and thrust for the engines.

C) Low ambient temperature (cold day) - Cold temperatures increase air density, which improves lift and enhances engine performance.

F) Minimum aircraft weight - A lighter aircraft requires less lift and has a shorter take-off roll.

G) High-lift devices - High-lift devices, such as flaps, increase the wing's lift coefficient at lower speeds, allowing for an earlier take-off.

H) Large wing surface area - A larger wing area can enhance lift at lower speeds, thus potentially shortening the take-off roll.

Therefore, the correct answers that help in shortening the take-off roll are B, C, F, G, and H.

Additional notes:

• A) High ambient temperature generally is detrimental because it reduces air density, leading to longer take-off rolls.
• D) High altitude runway has the opposite effect as it results in thinner air, which decreases lift and engine performance.
• E) Maximum take-off weight typically increases the required take-off roll length.
• I) Small wing surface area can limit lift generation, potentially increasing take-off distance.