When I first started building my Boxer-EV, the motor I installed in it was the largest brushless motor available for RC systems:
Model: HXT80-100-B Wire Turns: 8 Resistance: 32ohm Idle Current: 2A ESC Required: 130A Input Voltage : max. 48V Kv : 130 rpm/V Weight: 1570g Shaft: 12mm Voltage Range: 20-48v Non Load Current: 2.0A Maximum Power: 6500W Equivalent: 60-80cc Gas Engine
I've been very happy with it. With my 48 volt setup, I'm producing enough power that my drive belt started slipping -- so I reduced the gearing a bit to back off the torque. Still, vroom vroom.
ProgressiveRC.com has a great online list of RC brushless motors and you can sort by watts consumed. Looks like there are some great 10,000 watt motors (holy cowabunga!) the only problem being they are around US$2000 and above. My $130 + shipping RC motor is still on the top of the price/performance curve.
It looks like the dealer in Hong Kong I get things from has come out with a new version of the motor. The specs seem the same but they note: "Tight, thick copper windings and 48SH magnets make this motor a real powerhouse. The v2 motor also has screwed end-caps due to the amount of torque this motor produces!"
Model: TR80-100-B Wire Turns: 8 Resistance: 32ohm Idle Current: 2A ESC Required: 130A Input Voltage : max. 48V Kv : 130 rpm/V Weight: 1570g Shaft: 12mm Voltage Range: 20-48v Non Load Current: 2.0A Maximum Power: 6500W Equivalent: 60-80cc Gas Engine
The 180kV "A" six-turn version produces just a bit more power than its eight-turn sister (7000 watts vs. 6500 watts) although it's smaller, which makes me doubt its specs.
Model: TR80-100-A Turns: 6 Maximum Power: 7000W Resistance: 17ohm Idle Current: 3.5A ESC: 150A Input Voltage : max. 48V Kv : 180 rpm/V Weight: 1570g Shaft: 12mm Voltage Range: 20-48v Non Load Current: 3.3A Equivalent: 60-80cc Gas Engine
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