can anyone know how to make a ducted fan calculations ? bcoz i am making a hoverbike which is powered by 4 electric ducted fans at home . i have done everything but i have stopped at ducted fan making, i dont know how to make it please help me. i want to know how the rpm ,voltage , current thrust and thrust to weight ratio is going to calculate, i dont even know how much should be the diameter of my ducted fan please help me in my project....., Thank you!