What happens when a wing stalls?

Most general aviation wings stall between 16° and 18°. This is known as the critical angle of attack. As you increase the angle of attack the centre of pressure (bottom of the wing) moves forward. As this happens the boundary layer is unable to follow the contour of the wing and begins to separate from the top of the wing starting at the trailing edge. As the angle of attack continues to increase the centre of pressure continues to move forward and as subsequently the boundary layer continues to separate from the top of the wing moving toward the leading edge. When the maximum lift coefficient is reached the stall occurs and the center of pressure rapidly moves backwards. This causes the nose to pitch down. <div class="fusion-image-element fusion-image-align-center in-legacy-container" style="text-align:center;--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);"> <img width="1000" height="750" alt="The Critical Angle" src="https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12.jpg" class="img-responsive wp-image-1290" srcset="https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12-200x150.jpg 200w, https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12-400x300.jpg 400w, https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12-600x450.jpg 600w, https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12-800x600.jpg 800w, https://www.runup.ca/wp-content/uploads/2020/04/the-critical-angle-of-attack-the-stall-ex-12.jpg 1000w" sizes="(max-width: 800px) 100vw, 400px" />

How often does the pitot static system and the altimeter need to be calibrated on a VFR airplane to fly in Class B airspace?

Q: How often does the pitot static system and the altimeter need to be calibrated on a VFR airplane to fly in Class B airspace?

The pitot static system and the altimeter need to be calibrated every 24 months to fly in class B airspace.

Most general aviation wings stall between 16° and 18°. This is known as the critical angle of attack. As you increase the angle of attack the centre of pressure (bottom of the wing) moves forward. As this happens the boundary layer is unable to follow the contour of the wing and begins to separate from the top of the wing starting at the trailing edge. As the angle of attack continues to increase the centre of pressure continues to move forward and as subsequently the boundary layer continues to separate from the top of the wing moving toward the leading edge. When the maximum lift coefficient is reached the stall occurs and the center of pressure rapidly moves backwards. This causes the nose to pitch down.