Quote:
(1) Wheelbase:750mm
(2) Loading: <75kg
(3) Range: >25km
(4) Max. speed: 30Km/h
(5) Batter: Lead-Acid
(6) Battery: 24V x 40Ah
(7) Motor: Speedy brush motor 700W
(8) Tyre: 70/80-13(F/R) tubeless
(9) Rims' material: aluminum
(10) Frame material: iron
(11) Dimensions: 1,180 X 800 X 920mm
Packing:G.W.: 78kgs, N.W.: 65kgs
Carton size: 1,150 X 830 X 750mm
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...and get more information.
Max speed divided by Range gives 30 kph / 25 km = 50 minutes runtime at full speed
Battery volts x battery amp-hours gives capacity = 960 watt-hours
Motor power rating times max runtime gives max discharge, 700 watts * 0.8333 hours = 583 watt hours
Depth of discharge = 1 minus (battery capacity minus max discharge / battery capacity, 1 - (960 wh - 583 wh) / 960wh = 60%
Estimated weight of Lead-acid battery pack is 960 wh / 13 wh/lb. = 70 lbs.
Estimated weight of necessary, unused reserve of battery pack is 40 % * 70 lbs. = 28 lbs.
Unlike NiCad, NiMH, & Lithium-ion, the Lead-acid chemistry is not capable of 100% depth of discharge (DOD) if you expect it to last for several hundred charge cycles. If you want your Lead-acid battery to last a normal lifetime, you'd better not discharge it completely before recharging it. If you do discharge it 100%, it will severely affect the number of remaining lifetime cycles left in the battery.
That's why it would make sense to keep a sizeable reserve on any Lead-acid battery powered electric vehicle.
Which makes the clone pay a substantial weight penalty. Oh well, being heavier will increase traction, but could increase stopping distance, depending on the braking methods.
Typical suggested retail on 24v, 40ah worth of Lead-acid batteries, about $225 - $300
Approx. volume of 24v, 40ah worth of Lead-acid batteries, a little over 1 / 3 of a cubic foot
Other significant differences to a Centaur:
Centaur has low-speed, two wheel balance mode.
The two Centaur motors are 2.5 HP peak, each, although they may only operate at an average of 1 hp (~750 watts) or so.
Centaur motors are brushless, and therefore do not require maintenance.
Centaur prototypes seen so far have plastic wheel rims and are 14" diameter, not 13".
Centaur's battery, being Saphion, weighs about 45 lbs.
Centaur has a built-in charger.
Centaur's speed control sonically masks the PWM drive signals to the motors, no annoying hum or tone.
Things we'd like to know about the clone:
What's the hill climbing performance like?
What does it use for brakes?
Does the motor controller regeneratively recharge the batteries on downhills and during braking?
Based on the mech. specs., it should cost less than twice as much as a "Q" scooter. Is this so?
What are the consequences if someone accidentally throws the reverse switch when traveling full speed?
Does it qualify as a NEV in the US?