http://vimeo.com/49863540someone might get a laugh from this one...
design concept of the platform:
The idea was to use scrap materials to build a light cat that is suited to easily launching and sailing at a
certain bay, then working up to longer runs down to kanaha and back up to hookipa.
The deep V design has been around for decades maybe millennium.
A wildly different concept is the big boxy shape that is popular today. with that shape, the more you push down on the box tail, the more it tries to lift out of the water at speed. The system acts like the tail of a windsurfer. The boxy hull shape is used on everything from the straight boarded f18 to the foiling ac72.
So this 9'8" boat is the V type. Kind of opposite world in a way.
the V shape gives a smooth ocean ride vs, the boxy tail/hull shape which gives a pounding ocean ride.
from experience i can say the V shape seems to rise up out of the water on the fast downwind runs especially.
also when leaned on it's side, a shape similar to the bottom of a windsurfer is presented to the water. So the outline curve of the hull becomes the rocker of a windsurf board bottom once the hull is leaned over. This cat is a wave model so curved rocker lines are being used like with boards.
The center of effort of the sail is above the rudders so they act as dagger boards on the upwind. version 1 rudders are larger than they should need to be for the sake of testing future versions. error toward the side of being able to tack.
A resistance to pitchpole was at the top of the list of concepts and a very full outline at the bow is used. The double ended hull outline was used so that leaning back would seriously lift the bows up making the pitchpole save a real possibility in case of nose dive. A tune up of the outline, and geometry of the rig/platform may be scheduled in future protos.
