ORIGINAL: Matt Kirsch
It's not about the motor, it's about getting enough Watts through the motor.
or getting enough watts to the air... you can buy a Hacker system and still have less power then the AXI just because the motor happen to say 9 instead of 13, or 11 instead of 14... the important thing is to get all the numbers right to swing as large prop as possible.
AXIs like voltage better then amps so aim for 10s setup and maybe 50Amps and that on a 20" prop. looking at Gregs experiments that should be very possible.
I´m more in to geard systems where my choice would fall on a Hacker C50 12XL 8s3p setup with a prop to pull 70Amps, say 22x12 or so. more power, more $$$
good luck and have a nice weekend!