32 N of force at 9644 RPM, Four Blades Propeller.
27 N of force at 9644 RPM, Three Blades Propeller.
I dragged on that extrusion pattern along the entire blade. What I think that was happened is that now the air moves over the top surface even faster than before and creating much lower pressure. Compared with the best propeller design with the same size that I could find, this propeller generate 400% more lift. According to the simulation, the conventional propeller generate around 7N of lift meanwhile this one generate 22N. Now, personally I don't trust too much in the simulation so until someone (or even me) could make a real prototype and test it, I can't promise anything. I hope helped somebody.
I made some modifications to the model, and the simulation says that the force has increased and the average turbulence has decreased. If someone has any ideas to improve it I'm open to suggestions :D
I design this propeller 3D model in my way and I add some features which improve the thrust and reduce the weight. I ran several flow simulation to determine the efficiency of the propeller, and I was surprised by the result, I expected a much lower thrust. I don't own a 3D printer so I can't print it and make real tests, if anybody wold make it and share his results I will be very grateful.