The search for a perpetual motion machine has been going on
for a long time. One of the first such
machines was the overbalanced gravity wheel invented by the Indian Mathematician
and Scientist Bhaskara. Surprisingly many respected figures from the world of
science including Richard Feynman have tried to design pmm's. Then there are
the over unity devices like the Bedini motor and Teslas turbine, that claim to
generate more energy than is used to start them up. On the other hand free energy devices, where
nothing is put in accept the machinery and the motivational force is provided
by nature are different and are known to work. These include Hydroelectric
devices, wind turbines, solar both thermal and PV and so on. One of the best
examples of free energy devices (in the sense of the definition given above) were
the sailing ships. The clippers of the eighteenth century that plied between
Boston and China could generate a surprising 3000 hp (2.5MW ) and keep up this rate
of power generation for weeks on end !
So sailing ships are probably the best example that exists of a
sustainable renewable energy device. Yet what is remarkable is that these ships
were able to travel against the wind almost as fast as they could travel when
running before the wind. Think about it, what good would even 2.5 MW of power
have been if ships were only ever able to move forward with the wind behind
them. Circumstances existed that made it possible for sailing ships to sail
both into the wind and with wind, which is why they were so successful. The ships were able to maintain this fantastic
output because the oceans contain hardly any impediment to slow the wind. If
one solution for sustainable renewable energy exists surely others do also. We
just have to find them. At present the intermittency of power delivered by
sources like solar and wind, make their integration into the grid a joke ( and
a very expensive one at that) and a final dependence on such intermittent and
undependable power sources absolutely impossible. I think even with adequate
storage these sources of energy would be unacceptable, especially if that
storage is in the form of batteries.
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