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"Gilles Tran" <gil### [at] agroparistechfr> wrote in message
news:47e3c3cf$1@news.povray.org...
> 47e3be7f$1@news.povray.org...
>
>> Ah well, that would explain why it hasn't been done yet, but I still
>> think that with our great engineering brains, it 'might' be possible.
>
> As Gail said, not without breaking the laws of thermodynamics as we
> understand them, so it would require a little more than engineering
> brains.
> However, this never stopped people to create "perpetual" motion engines
> that were always eventually proved to be either hoaxes/scams, or genuine
> but not working, or working but not actually perpetual (i.e. requiring an
> external energy source to work).
Yes, I've just done a little reading about PMM's and thermodynamics was
mentioned quite a lot. I don't know, I can see that yes, there would be a
problem with heat, but what about other materials? I know that PTFE is one
of the slipperiest plastics out there, but then of course, you wouldn't have
the strength.
By the way, I think I remember on an old Tomorrows World program (late
70's?) that an oil-less car engine had been produced, (still needed petrol
per unit. I wonder what happened to that?
~Steve~
>
> G.
>
>
> --
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