Originally Posted by Camaro_freak

I realize this is off topic, but It's ironic this came up here because I was just thinking about the feasibility of this today. It is not a trivial concept, that is for sure. You would want an isolated electrical supply powering the compressor, and it would take a high power motor to make the needed CFM and boost. I'm not sure how much power it takes to power a supercharger, but I'll assume 30 HP for now. That translates to 22.37 kW. If you are using a 12V system, that means the motor would need almost 1900 amps to power it! You could use multiple batteries in series to reduce the current to a reasonable level (with a higher voltage motor to match), but now you're talking some serious additional weight. But there would be some cool benefits. You could fully spool the thing before launching, it would have ZERO parasitic loss (as long as it's isolated from the main electrical system), and you could have max boost throughout the entire rpm band. You would obviously have to recharge the batteries before too long also. It's interesting to think about though.