I measured the thrust earlier, my hi-tech test equipment constited of a stick tied onto the back wheel pushing down on my kitchen scales, 10A multimeter and an old school lab power supply, this is probably accurate to 10%. It was very close to 5N per amp up to the psu limit of 8A, max torque is 22.5Nm at the fitted controllers limit of 18A, resistance was 0.38ohm if my cheapo 2nd meter is accurate. Powabyke motors have a slower wind, extrapolating from mine they should give around 7N per amp, I'll test one next.
To haul me and bike up a 1:7 hill, I need 200N, 40A is probably pushing my luck with the brushes, I'll probably try powabyke innards in my sakura rear hub, 30A and more voltage to get the speed back. It should crawl up a 1:7 at about 5mph, which is somewhat faster and far easier than walking, more tests soon.