OK, this isn't a future car idea per se, but this is the best forum I could think of. I've become interested in catamarans recently after seeing a few sweet ones down in the Caribbean. They now have sailboats with entirely electric engines for tooling about when not under sail and battery banks that also run the whole ship. When under sail, the propeller runs backwards and charges the batteries with the aid of a few solar panels. I'd like to see one of these major European boat manufacturers partner with Tesla to design battery packs and drivetrains for large sailing vessels. How great would that be? Tooling around the world's great ports knowing you're not burning through one drop of diesel. Maybe wk057 could take a couple totaled Model S packs and retro-fit one?