RE: The Nanogirl News~

From: Mike Lorrey (mlorrey@yahoo.com)
Date: Tue May 27 2003 - 08:33:14 MDT

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    --- Spike <spike66@attbi.com> wrote:
    >
    > spike:
    >
    > Carbon nanotubes have demonstrated electric current densities
    > of up to 15 Amp/cm^2.

    Is this a measurement of the amp handling for a given cross section of
    conductor? If so, this is rather poor, really no different than found
    in common carbon brushes used in electric motors. Worse, even. I
    regularly work with DC motors on both the condenser and evaporator
    sides of A/C systems which use four carbon brushes, each about 2 cm^2,
    and they draw a couple hundred amps easily at 24 volts. Each motor has
    two 140 Amp breakers, and pops them when the brushes have worn down to
    less than half their original length (about a year of regular duty operation.)

    =====
    Mike Lorrey
    "Live Free or Die, Death is not the Worst of Evils."
                                                        - Gen. John Stark
    Blog: Sado-Mikeyism: http://mikeysoft.blogspot.com
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    Pro-tech freedom discussion:
    http://groups.yahoo.com/group/exi-freedom

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