The new AC 45 boats are up there in the most ridiculous wind powered machines on the planet.. i got to have a look around one while i was at dads work a few months ago and they are just incredible. weigh nothing and just some of the coolest engineering ive ever seen. The bows are my favourite, reverse slope.. for those that arent familiar with boats ill put it this way for the bikers out there. The americas cup has gone from riding advanti pistas to custom forward sloping ill as hell raleigh pursuit bikes.