Stalls in turbulence

[martymayes]

Not necessary climbing, let's assume I'm flying straight and level at 150 ft AGL when the 15kts headwind suddenly changes its direction 180 degrees. My airspeed will drop 15kts or 30kts?

If it were an instantaneous event, the change in airspeed would be 15 kts. Example: Flying straight and level at 115 KIAS. Doesn't matter if it's a 15 kt headwind or a 50 kt headwind, the plane's speed relative to the air is 115 kts. Wind shears to 15 kts of tailwind, the change in airspeed is 15 kts. 115 - 15 = new speed relative to the air of 100 kts. Now, thrust is > drag so the plane accelerates back to 115 KIAS. If the pilot did not change the angle of attack to compensate for the decrease in lift when the speed changes, plane would lose altitude but not 150 ft. If the pilot did increase angle of attack, his stall margin would decrease but not enough for the plane to stall.

Why that one second is not enough to induce a stall (with wing drop if it's stalled just one wing)?

When the plane is unloaded (i.e. the gust is past), it resumes flying like nothing happened. A gust is a momentary event. It would happen so fast the pilot would go "duh" and the event would be over.

I think your imagination is getting the best of you. Perhaps a flight lesson or two will clarify some of these misconceptions.

Under the right conditions, you can impress your friends by flying the plane backwards! All you need to do is fly at 40 kts into a 50 kt headwind.