Besides the previously mentioned relative error discussion in third digit precision that shows up in subtraction of measured values, the perplexing counter argument to the anomalous Trial #1 centers on the DC motor's efficiency. If the efficiency is assumed to be about 90%, for example, instead of 100%, then we have the interesting problem where the transfer function of the motor is a constant 0.9 multiplied by the torque or the battery power delivered. This means that the values recorded for the "torque to generator" would be 10% lower and the difference, being the back torque of interesSt, would be 10% less as well. This creates an even greater advantage to the free energy advocates, who would see the OPFG becoming over-unity in this example.
For future experiments, it is important to have efficiency curves for the motor in use and to measure to four-place accuracy wherever possible. The fascinating discoveries of the OPFG in the lab, the connection to the earth's own core activity, and the prediction by Nikola Tesla make the interest in the OPFG justifiably increase year after year.
THE FREE ENERGY DEVICE HANDBOOK Proc. Sntersoc. Energy Conver. Eng. Confer., 1991
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