I suspect that a boat with windmill sails will not go straight upwind. I can't imagine how the windmills would produce enough excess energy to overcome the various frictions involved (air resistance, gearing, water resistance, etc.) Might be able to go upwind, but not straight upwind...

And look up hydrnol. It seems like a good alternative because:

- it handles like current petrochemicals (can use existing fuel distribution infrastructre)
- can be used in conventional internal combustion engines, tubojet/turbofan engines for generators, or hydrogen cells
- hydrogen can be sourced from renewable and/or green energy systems (solar, nuke, wind)
- product is recycled after use (depleted hydrogen is added back to mix)