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On Fri, 10/9/15, Bruce Johnson <xxxxxx@Pharmacy.Arizona.EDU> wrote:

 Subject: Re: [TML] Understanding batteries and solar and motors.
 To: "xxxxxx@simplelists.com" <xxxxxx@simplelists.com>
 Date: Friday, October 9, 2015, 1:49 PM

 > On
 Oct 9, 2015, at 9:43 AM, Anthony Jackson <xxxxxx@iii.com>
 wrote:
 >
 > From:
 Jeffrey Schwartz
 >
 >>> 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...
 >>>
 >>
 >> I wonder how
 that changes with "active suspension"
 technologies?
 >
 >
 Well, the active suspension will need to be bigger and more
 powerful if it's controlling bigger wheels, so
 there's a fair chance that it's even worse with
 active suspension. However, just cutting down the number and
 length of mechanical links can help, and there are control
 advantages to being able to apply force to each wheel
 separately, so one motor per wheel has likely benefits no
 matter what.

 Also I wonder
 how much of that rule of thumb applies when the ‘unsprung
 weight’ is essentially the wheel itself, especially in the
 case of hub motors.

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Actually, lightening up the wheels was a really big deal & therefore the main goal.

Wire spokes, aluminum rims, plastic fenders, anything to make it lighter...

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