I think the one with the motors is cute, but there are a few things left out of the analysis. Have you revisited the idea of a simple cam that extends and retracts the weights as they go around? Little roller bearings as cam followers would be very low friction, and would rival that electric motor contraption in efficiency. Either way, you'll be dedicating some energy to weight redistribution... I re-read your long, heartfelt post from earlier, and I sympathize with your situation. I mean no harm or ill-will. I am a very practical person and I am interested only in the truth. If we agree to these two statements: 1. Energy can neither be created nor destroyed, 2. You have stated that your wheel does not create energy, Then we must ask: How does the wheel do anything useful? I am quite skilled and comfortable with the theory that says it won't work; what is the theory that says it will? Best Regards, -Strambo ________________________________________________________________ "Many well-trodden paths, alluring and full of promise, simply lead nowhere."