Re: Mobile S-Rotor!

A suggestion -- think through the process you are proposing and
articulate it very clearly.

When you talk about attaching a wind energy device to a vehicle, it
sounds like another variation on a perpetual motion machine -- which
obviously is not going to work. But maybe that is not the whole story.

There is no wind, in your scheme. There is only the motion of the
vehicle through still air. For simplicity, we may choose to think of
that air movement past the vehicle as wind, but that is not quite
accurate. Part of the energy output of the engine driving the vehicle
is dissipated uselessly by causing turbulence in the previously still
air -- wasted energy. We call it drag; it is analogous to friction.

Now, if your "wind energy device" is effectively reducing drag
(turbulent dissipation of the engine's energy in air) by an amount
greater than the energy extracted by the turbine (from the relative
movement of the air versus the vehicle), then the laws of
thermodynamics would not be broken. If your current estimates of drag
and of energy production from the turbine are correct (a big if, absent
real data), then what you are really doing is suggesting a way of
reducing the turbulent dissipation of energy when a vehicle moves
through air -- throw away the turbine and simply keep the curved
surfaces that are altering the air flow in such a beneficial way. That
could be much more important than the "wind energy device" itself.

Of course, smart people at automobile companies and aircraft
manufacturers have spent goodness knows how much time & money seeking
ways to reduce drag by clever shaping of surfaces. If there were some
big opportunity (like your wind energy device suggests), they would
probably have found it many years ago. But maybe not!

Clarify your understanding of the process, and get data.

.

Relevant Pages

  • Re: Mobile S-Rotor!
    ... > When you talk about attaching a wind energy device to a vehicle, ... A perpetual motion machine does work without an energy ... while my device uses the wind created by the moving vehicle as ... If your current estimates of drag ...
    (sci.energy)
  • Re: Mobile S-Rotor!
    ... > When you talk about attaching a wind energy device to a vehicle, ... A perpetual motion machine does work without an energy ... while my device uses the wind created by the moving vehicle as ... If your current estimates of drag ...
    (sci.energy)
  • Re: Mobile S-Rotor!
    ... >>> If the air initially enters at 88 fps, each lbm of air has a kinetic ... >>> But not all of that energy is recoverable. ... >> That is true also but only wrt airfoiled blades and not wrt drag type ... >> the vehicle and then how much hp is needed to push the box. ...
    (sci.energy)
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