China Civil UAV Theory Questions — Questions 1042–1051

Study note: strong headwind, third turn early, fourth-turn point closer. In a strong headwind landing, the third-turn timing should be advanced appropriately so the fourth-turn point is slightly closer to the landing point than normal.

Study note: strong headwind, third turn late descent, fourth-turn height higher. In a strong headwind landing the descent rate is high, the fourth-turn entry height should be slightly higher, and the descent timing should be delayed appropriately.

Study note: strong headwind, fourth turn, ground speed lower, descent point forward, throttle larger. In a strong headwind landing, after the fourth turn ground speed decreases, the glide angle increases, the descent point should move appropriately forward, and the throttle should be increased promptly to maintain the corresponding speed in descent.

Study note: strong headwind, large airspeed, strong control effect, late flare. In a strong headwind landing, the descent airspeed is larger, control-surface effectiveness is stronger, and the flare should begin slightly later than normal.

In a strong headwind landing, after the flare, speed decreases faster and the float distance shortens.

In a strong headwind landing, in the early float, speed is high, sink is slow, and the pull should be gentle to prevent ballooning.

In a strong headwind landing, after landing, ground speed decreases fast, so braking should not be too early.

In a tailwind landing, the third-turn entry timing should be delayed appropriately, the turn angle should be reduced appropriately, and the fourth-turn point should be appropriately farther from the landing point.

Study note: in a tailwind, close the throttle earlier. In a tailwind landing, the fourth-turn entry height should be slightly lower than normal, and the timing for closing the throttle, descending, and entering should be advanced appropriately.

See the reference chart.