Friday, 28 October 2011
Gravity can be used to power gravitywheels continuously because it is a conservative force.
Many people believe that Johann Bessler's claims were genuine, in which case an acceptable theory which fits in with modern science, has to be found which will allow a gravity-driven (or gravity-powered) wheel to work. There is strong scepticism against such a device for good reason. It appears to go against everything we have been taught. Putting on one side, for a moment, the statement which says you can't do it because gravity is a conservative force, there is the seeming impossibility of raising a weight again once it has fallen, causing a wheel to overbalance. That energy appears to be lost and therefore an additional energy source is sought which will bridge the gap or close the circle.
Various methods have been suggested such as using ambient temperature changes or static electricity or even a solenoid valve on a spring. The truth is that no one has come up with a viable additional energy source - except for me! We know Bessler said his weights worked in pairs; I have suggested that the secondary, 'shifter', weight fell and in doing so moved the primary or 'shifted' weight into a position which unbalanced the wheel. The additional energy source is therefore also gravity. There are two weights, one falls and has no effect on overbalancing the wheel but the second weight is moved by the action of the first weight and it is that one's position which overbalances the wheel. There are two pieces of gravity used separately,
I have, in the past compared the force of gravity to the wind in an attempt to show that it may be a conservative force but that does not mean it cannot be used to drive a weighted wheel continuously. The wind is used to drive windmills, waterwheels and boats, why not gravity?
Because my argument rested on the theory that wind was a conservative force I sought support for the idea from the internet. Surely I would find either a definitive statement that wind was conservative or nonconservative. Imagine my surprise therefore to discover the extraordinary fact that I am unable to find a single web site which definitively states that wind is either conservative or nonconservative! Nobody discusses it - or nobody is able to say one way or the other.
I did find one fleeting reference which stated that "wind drag is friction and therefore non-conservative". The example referred to a racing car and the effect of wind drag which was therefore friction and so a nonconservative force. I agree in that context, but let us consider some simple definitions secured from the internet.
"The work done by a conservative force in moving a particle between two points is independent of the path taken." This also applies to the wind, we only measure the strength of the wind by seeing how far it moves something from A to B, the path is irrelevant.
I can lift a fallen rock against gravity and allow it to fall again. I can also catch a balloon blowing in the wind towards me and carry it back upwind and allow it to blow downwind again. There is a clue in the words "UPwind" and "DOWNwind".
"A conservative force can be thought of as a force that conserves mechanical energy. Suppose a particle starts at point A, and there is a constant force F acting on it. Then the particle is moved around by other forces, and eventually ends up at A again. Though the particle may still be moving, at that instant when it passes point A again, it has traveled a closed path. If the net work done by F at this point is 0, then F passes the closed path test. Any force that passes the closed path test for all possible closed paths is classified as a conservative force". When the wind causes a windmill to rotate, the blades travel a closed path so the wind is a conservative force.
"For non-conservative forces, the mechanical energy that is lost (not conserved) has to go somewhere else, by conservation of energy. Usually the energy is turned into heat, for example the heat generated by friction. In addition to heat, friction also often produces some sound energy. The water drag on a moving boat converts the boat's mechanical energy into not only heat and sound energy, but also wave energy at the edges of its wake. These and other energy losses are irreversible because of the second law of thermodynamics." The windmills provide useful and usable energy - it is not 'lost' - which can grind flour and pump water etc. So wind is not a nonconservative force.
"Conservative Forces are reversible forces, meaning that the work done by a conservative force is recoverable, i.e. you can get out any work you put in or vise versa." Wind is a reversible force. Not only does the wind drive windmills but, for instance, you can electrically drive a windmill and produce wind. The wind is a reversible conservative force. use an electric fan and place a small windmill in the path of the wind. The windmill will begin to turn.
Saying that gravity cannot power a gravitywheel because it is a conservative force is incorrect. However this does not solve the problem of how to make it work for us but it does show that it is not impossible just because it is a conservative force.
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