02-03-2011, 10:34 PM
Have at it
http://www.ecalc.ch/motorcalc_e.htm?ecalc
I don't know the exact math but from practice, adding an extra blade will add more torque/thrust than speed.
I always think of diameter being your torque/thrust and pitch being speed.
Either way, if you wanna keep the awesome top end speed with a 3 blader it looks like you're going to have to find a very high pitch (Perhaps oversquare) and reduce the diameter to compensate.
Something else to consider is that as you reduce prop diameter, it looks more poxy
http://www.ecalc.ch/motorcalc_e.htm?ecalc
I don't know the exact math but from practice, adding an extra blade will add more torque/thrust than speed.
I always think of diameter being your torque/thrust and pitch being speed.
Either way, if you wanna keep the awesome top end speed with a 3 blader it looks like you're going to have to find a very high pitch (Perhaps oversquare) and reduce the diameter to compensate.
Something else to consider is that as you reduce prop diameter, it looks more poxy