ouch hooooo cheers rah begin forwarded text date thu NUMBER sep NUMBER NUMBER NUMBER NUMBER NUMBER from same guy subject re electric car an edsel to r a hettinga rah shipwright com bob this guy s an idiot i design loads for systems with the NUMBER kv capacitors one of those has NUMBER of such capacitors and stores only NUMBER megajoules which means NUMBER kilojoules each they weigh NUMBER kg you need high energy per unit mass and the capacitive system i picked maximizes that it is precisely the system that maxwell is touting for electrical braking and power augmentation for regenerative use in automobiles you also need voltage you can use in a dc motor which is why though the actual capacitors in the system are charged to NUMBER NUMBER volts the system has them arranged in series to boost the voltage ignore him he s a waste of my time somebody s sig from r a hettinga rah shipwright com subject re electric car an edsel date wed NUMBER sep NUMBER NUMBER NUMBER NUMBER NUMBER to some people begin forwarded text date wed NUMBER sep NUMBER NUMBER NUMBER NUMBER NUMBER pdt from adam l beberg beberg URL to r a hettinga rah shipwright com cc fork spamassassin taint org subject re electric car an edsel on wed NUMBER sep NUMBER r a hettinga wrote maxwell www maxwell com makes and sells high energy density capacitors called ultracapacitors they deliver them in an air cooled voltage regulated module that will charge to NUMBER v and hold NUMBER kilojoules roughly the energy in NUMBER teaspoons of sugar or a bite of a donut and weighs NUMBER kilograms if that electrical energy could all be converted to kinetic energy there s enough to get the capacitor module up to about NUMBER mph in a vacuum since the energy you can pack into a capacitor is something like NUMBER NUMBER c v NUMBER you want to design your system with the lowest voltage possible to fully exploit that v NUMBER so yea a NUMBERv system will only be useful for accelerating insects not cars that must be why NUMBERkv is standard not NUMBER the joke of putting NUMBER into goggle to find that model was not missed btw most production systems use a mix of batteries and capacitors as very few real world applications run for less then NUMBER seconds like the car we were talking about originally even NUMBER seconds is pushing the capactior is the wrong choice limits thats why the landspeed record model is a battery one it s got to run for a much longer period of time and needs a steady discharge curve but it should be safe to say that most people want the indy NUMBER version not the NUMBER NUMBER mile sprint version when they are looking for a vehice for those you dont want a battery or a capacitor you want to take advantage of whole atoms not just electrons then you can suck off the electrons you need with a fuel cell however you will use both capacitors for the braking accel and batteries to not just dump excess energy in the design adam l duncan beberg URL beberg URL end forwarded text r a hettinga mailto rah ibuc com the internet bearer underwriting corporation URL NUMBER farquhar street boston ma NUMBER usa however it may deserve respect for its usefulness and antiquity predicting the end of the world has not been found agreeable to experience edward gibbon decline and fall of the roman empire end of original message end forwarded text r a hettinga mailto rah ibuc com the internet bearer underwriting corporation URL NUMBER farquhar street boston ma NUMBER usa however it may deserve respect for its usefulness and antiquity predicting the end of the world has not been found agreeable to experience edward gibbon decline and fall of the roman empire 