Physics of Windsurfing

Using 3D software (Blender) this video will explain the physics behind windsurfing. This will cover the following:
1. The force of the wind on the sail
2. Why the board doesn't get blown downwind
3. How you are able to sail faster than the wind
4. Does the shape of the sail provide lift
5. How to steer the board

NOTE on Lift discussion:
There is a point of confusion in the discussion of LIFT (5:30-6:30). Just to clarify the point in the video where I indicate that the curve of the sail does not "lift" the board upwind it is using the term lift in the laymen's sense and to indicate that the board is not magically pulled upwind. The NASA simulator clearly indicates that the lift, although negative, is THE force acting on the sail and is therefore ultimately responsible for the driving force on the board, a force which can and does take it upwind.
This video focuses on the Newtonian theory of lift. For a brief discussion of theories of lift see:
Higgins 2020: https://www.scientificamerican.com/ar...
Babinski 2013: http://www3.eng.cam.ac.uk/outreach/Pr...

CORRECTION: The negative lift force shown in the orange arrow at about 6:12 is meant to point downwind and therefore should be pointing to the right rather than down to the bottom of the screen.

Additional NOTE: The description of steering (6:30-7:10) is meant to reflect steering in low-wind, non-planning conditions.

NASA wing lift simulator:
https://www.grc.nasa.gov/www/k-12/air...

The formula for wind pressure (dynamic pressure)
https://www.engineeringtoolbox.com/wi...
https://www.engineeringtoolbox.com/dy...

Closing video from Beauty of Windsurfing:    • Beauty of windsurfing  

Wind sound credit: Zapsplat.com
Airplane wing video: Video by Asko from Pexels