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On Fri, 10/9/15, xxxxxx@shadowgard.com <xxxxxx@shadowgard.com> wrote:

 Subject: Re: [TML] Understanding batteries and solar and motors.
 To: xxxxxx@simplelists.com
 Date: Friday, October 9, 2015, 12:03 AM

 On 8 Oct 2015 at 20:30,
 Bruce  Johnson wrote:

 >
 Also you get greater efficiency and performance if you move
 the
 > motors to the drive wheels;
 infinitely variable traction control and
 > zero transmission losses, more so if you
 go with AWD. A lot of
 > current designs
 eschew this in favor of a more typical electric
 > motor:transmission but that´s mainly to
 leverage existing vehicle
 > stock and
 parts. I was a little shocked to find I can buy the kit
 > online now:
 > <http://tzquanshun.en.alibaba.com/product/60044746306-800339755/273_8
 >
 _8kW_Hub_Motor_Electric_Hybrid_Car_Conversion_kit.html>

 Well, I recall reading long
 ago that motors in the wheels was to be
 avoided because you want to minimize the
 "unsprung weight" in the
 car.
 Something about riding better or being easier to control.

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Back when I was into moto-cross the rule of thumb, for motorcycles anyway, was that one lb of unsprung weight = 3-5 lbs of sprung weight as far as handling was concerned...

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