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I was reading up a thing today about how electric trains work. The modern ones don't use resistance to govern engine power, but instead the duty cycle of the input power. They do this because the power loss of a resistor would be huge! I'm looking into converting a car i own to electric in the...

i seem to remember reading in a magazine ("wired") that Tesla hired so many Lotus staff that Lotus ended up making them sign an anti-poaching agreement...

i'm no expert on this sort of thing, but i would suspect that the car would effectively be in neutral whenever neither the "throttle" or brake pedal is pressed. if you've ever played around with a small DC electric motor (yes, i know the roadster uses an AC motor) you may have noticed that if...

the question is, how much self-discharge would that ultracapacitor have? Self-discharge has always been a noticeable problem with electrolytic capacitors, though i don't know about these ultra-capacitors. If it discharges itself by even 10% per day, problems of overall energy efficiency arise