How to apply ducted fan theory to real world fans

Placing a propeller in a duct increases efficiency and maximum thrust. But how much? Do you need complex computer simulations to calculate this? This video explores applying Newton’s second law to ducted fans. I try practical experiments to learn about the physics that goes into developing a math model for describing ducted fan aerodynamics. Hopefully in the next video we can explore more about Bernoulli’s theorum and the Coanda effect, but I do touch on it in this video. Music from Youtube’s audio library