Quote:
Originally Posted by alex
Thanks flecc, esp. for directing me to the European Extra Energy tests and for the physics lesson. I found the A to B technical section good on amps etc. I need to check the output in watts of some of the bikes now esp. the motor's peak output, I am seeking gentle assistance up hills not for the motor to do all the work so I have not discounted the Sunrunner.
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The Torq's peak gross power is 576 watts Alex. It has a Hall effect motor which has a wide quite flat power curve, but as it's a high geared motor, the peak power isn't reached until 12 mph, where it's more useful for high speed attainment.
The Heinzmann is 600 watts gross, but it's a different motor type that gives a peaky narrow band response. If you think of it as 500 watts for comparison with the Torq, you'd be close, but that's reached at 8 mph where it's more useful for hill climbing.
I don't know the new Izip's power for certain, but the Izip motors are usually 450 watt gross. That won't be far out. It may be a motor like the Heinzman's, they usually are from Izip.
I don't know the new Sunrunner's power, but judging from the batteries and reported range, plus the ExtraEnergy test, it's probably about 400 watts gross, maybe a little less. It's a Hall effect motor.
Few manufacturers report these powers, so it's often difficult to get precise information. Gross power is the motor's consumption, the nett power at the wheel is usually about 80 to 85% of that these days.
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