You might recall that my Formula 40 catamaran hull lines held the world record for fastest rowing across the Atlantic last year. For a day. I did not know about the rest of the design, and a lot was wrong. I insisted on being fully involved with the next boat. Crew of 9. Here it is.
Rower 60 Trimaran
Main hull has L/B of 21:1. Displacement of 4848 lbs. Hull speed is 11 knots. At hull speed it takes under 6 hp to move at that speed. At that speed there is 265 lbs of form drag and 125 lbs of friction drag. Draft is only 12” so change in depth over the trip should not change much, keeping waterline long.
X bow allows less hull area, reduced windage and significantly less wave pitching. See video at http://www.militaryphotos.net/forums/showthread.php?152989-Xbow-Sea-Axe-A-future-in-the-Military-Design.
Next year everybody will have these bows. Flare is high enough above waterline that it should not increase pitching.
Total main hull max height is 6.5’. I say that the governing load will be a wave on each end and the middle in the air. The flare also helps restrain buckling.
Curved openings are much stronger. Upwind I would cover openings with Eisenglass or thin acrylic like man-powered craft record holders do.
Top will have solar panels and flush hatches as needed.
Amas are just under 17’ long and 1000 lbs displacement reserve. I see greatest load being pushed sideways 20’ by a wave. Location aft helps minimize pitching again as it spreads out the centers of buoyancy.
I assume beam should be completely rigid, like in bicycle racing where flexing frame is seen to absorb power.
I see this as having every possible thing done right. I don’t know if 5’ tall above waterline is too much. It does give more beam depth.