here is a nice datasheet of a VSR motor, that is almost unbelievable to me:
Model No. HP Peak HP Cont. Peak Torque(NM) Max speed Shaft OD(mm) Weight (kg)
RA215L 24.0 11.3 21.2(28.8) 15,000 1.1(24) 70lbs(32)
It only needs a controller with 4 silicone PWM-devices...