On Thu, 21 Dec 2006, Sandwich Maker wrote: > the problem is that you have to make them extremely precisely and from > very hard materials to be efficient [because what you have is very > much like a ball bearing] so that you can run very high contact > pressures because slippage is death. monsanto even developed a > special lubricant that turns solid under extreme pressure [santotrac > iirc] but apparently the technology wasn't there yet or we'd all be > driving them. Yeh, that variable-ratio stuff so far works only on low torque apps. Ball-and-disc integrators were used in mechanical computers around WWII, where the forces were tiny, and still slippage required all sorts of compensations. The best "converter" so far is powersource --> generator --> control circuitry --> motor. That's what locomotives do. It's not cheap. I think this really where "hybrid" technology will gain; it's a really efficient way to transform energy. Its just complicated. But complicated technology is what benefits from Fordism, look how much complicated crap is in a desktop computer and all in all they work really cheap for really long times for little money; you just can't fix them. I like really new laptops (might as well pot them in epoxy) and really old cars (they come with technical service manuals!). _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com