Thought this thread would be useful for those that are well trained in Physics (but others are welcome too) to provide help to inventors and experimenters and builders on possible excess energy production devices. This thread could be an avenue for a list of known past ideas that have not proven to produce excess output from a physics and factual point of view. However, since this is a site about over unity, this would be a good area for a discussion about how one might go about trying to obtain excess energy from a device from a physics and testable/factual point of view. That way comments don't center up on the negative, but some positive input and speculation to think outside of the box to help inventors and experimenters improve their device and better understand the physics profession and how physics might help inventors arrive at a workable solution for their device.
A list of formulas for figuring horsepower, power output of a motor would be useful etc...