Yep, there are a few different designs for home-brew hybrids.
I think that the plug-in serial hybrid is the way to go.
Basically, you have an electric car that runs on batteries, and if you need to go farther, you can switch to getting your electricity on the fly from a liquid fuel source.
Isn't that the Chevy Volt concept?
Yes it is.
Will we ever actually have the Chevy Volt? Who knows? But in the mean time, we can built it faster/better/cheaper in our own driveways.
PS: Please don't turn this into a conversation on the VOLT or EV-1, there are other threads for that!
Hey Tom, a Citicar would be an excellent candidate for range-extended hybrid conversion!