I am somewhat new to RC helicopter, so this might seem a bit ambushes.
I would like to design my own propeller, however while I am vary good at math and a fair sculptor (mostly carbon fiber). I cannot find sufficient equations on the internet to complete my design. I know that the angle of the blade changes as the radius changes from the hub moving outward, keeping the pitch constant. The equation I am using,
Angle = Tan^-1(pitch / (2*pi *r)) where 2*pi*r = the circumference. My question is, how do I know what pitch to use? This should be based on the rpm of the engine right? Do you have formula for it? Even recommending a book would be vary helpful. Any response is greatly appreciated, thank you for taking the time to read this.