I'm looking at the 6350 Dualsky motor right now, and the only concern I have is the rated wattage capacity. The Dualsky website says that this motor can handle 2000W for no more than 15 seconds, whereas we'd need to be able to output at least 1825W continuously. This makes me concerned that this motor mght not swing a big enough prop at the needed speed to give the kind of thrust that's needed.

The Hacker motor looks interesting though. The C50 8XL has a gearbox with a 6.7:1 gear ratio, so the corrected kV rating is 2030/6.7 = 303. Also, this motor has a lower resistance so it would draw more current at the lower pack voltage, and the fact that this motor is still in the XL family implies that it's capable of delivering the same kind of power as the XL Hacker motors that f3a flyers usually use.