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Re:(apologies) e- Assist Mark Garvey and anyone else w/ E assist..

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  • Morgan
    I realize my response below may have sounded curt, I wrote it in a hurry when I had somewhere else to be. Never a good idea. My apologies. Morgan
    Message 1 of 10 , Jul 5, 2008
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      I realize my response below may have sounded curt, I wrote it in a hurry when I had
      somewhere else to be. Never a good idea. My apologies.

      Morgan


      --- In rootsradicals@yahoogroups.com, "Morgan" <mcgurme@...> wrote:
      >
      > The only reason I am "so in love with batteries" is that they are the only economically
      > viable, mass produced item that is presently available with sufficient power density
      > for a vehicle like a bicycle.
      >
      > Supercapacitors are great, but last time I looked, none of them come anywhere close
      > to storing the 1/2 KwH of energy necessary for a typical e-bike. I would love to be
      > wrong about that.
      >
      > Flywheels are also great, but for moving vehicles, have various safety and handling
      > issues. They have to be encased in a very solid box so they don't produce shrapnel
      > if the vehicle is in an accident - this alone would obviate any weight advantage. Plus,
      > their high rpms mean that they will affect the handling of the bike. Again, I'd love to
      > be proven wrong, but I've seen nothing close to a practical and affordable flywheel that
      > I'd carry on my bike.
      >
      > What I have seen that's pretty nifty was an H2 powered bike at the recent bike show I
      > was at in China. Looks awesome. Only problem was the price tag: about $6,000
      > USD retail.
      >
      > Anyway, battery technology has drastically improved. It may be replaced in the
      > future by something better, but I think that time is a ways off. Just look at all the
      > investment that corporations like Toyota and GM have put into the new LiFePO4 battery
      > chemistry
      > (e.g. http://www.greentechgazette.com/index.php/batteries/lithium-iron-phophate-
      > lifepo4-batteries-for-electric-vehicles/). I use one of these batteries on my own
      > ebike, and at only 10 pounds, with thousands of cycles lifespan, and high safety
      > quotient, it is hard to beat.
      >
      > Morgan
      >
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