@Dozy,
An airplane moving forward at 500 kt encountering a sharp-edged upward gust of 100 kt would see the AoA increase by 11.3 degrees, and airspeed by 2%. That would increase the lift/weight ratio to about 1.8 and put the airplane in a stall. If the airplane maintains its pitch attitude, it would be accelerated upwards at initially approx. 0.8 g. As the airplane vertical speed increases the AoA reduces. The stall warning operates until the AoA is below the threshold. If the updraft lasts long enough, the airplane V/S will increase until it is equal to the updraft speed. The increased drag in the stalled condition would decelerate the airplane horizontally.
Last edited by HazelNuts39; 9th May 2012 at 16:31.