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Re: [EVDL] "Welcome to the real world, she said to me, condescendingly..."

Aren't those values for human energy consumption rather than crank power?
as measured by oxygen intake through a mouthpiece..

Dan

[email protected] wrote:
> Dan >>>
>
> No, air ball...
>
> Bill's numbers for 15mph work out to a very liberal 40 miles per kwh,
> without acceleration, hills, or wind: 3 miles from a singe Dewalt pack
> is actually pretty impressive. Don't quote claimed range from a
> website if you haven't actually done it yourself - most of EV distance
> specs are pure fiction and being off by a full 50% is not unusual.
>
> E-bikes may list a "400 watt motor", but that's the *labeled rating*
> -- the controller pumps in much more than that to maintain 20mph
> (which is the Federal limit for production e-bikes).
>
> As for the human equivalent:
>
> "Figures from Bicycling Science 2nd ed., Whitt and Wilson, MIT Press
> 1994, p186:
>
> Note that figures for human-powered transportation are in incremental
> consumption above the resting level.
>
> Road bicycle plus rider:
>
> 4mph 8.4 kcal/km
> 10mph 15.6 kcal/km
> 15mph 24.4 kcal/km"
>
> Feel free to do the math, but 15mph works out to ~45 wt-hrs/mi. Maybe
> it was done with a fat guy on a fat-tired bike...
>
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