RE: Platt FW-190
Well, such is the nature of electric. The motor always wants to turn at so many rpm per volt. In my case, the motor is turning about 200 rpm per volt, so if I wanted to turn at 8000 rpm I'd have to run it at about 40 volt, but my battery is only about 33 volts. The motor will always try to turn at 200 rpm per volt, no matter the size of the prop, it just pulls more current as the prop gets bigger. Since the voltage and rpm/volt is fixed, the only way to get the power up to a reasonable level is to put a bigger prop on it to raise the current (power=volts x current). That's why electrics usually run a bigger prop slower.
So if I put an 18x10 prop on it, it would still turn at about 6300 rpm and it wouldn't put out enough power.