Boats; and (3) efficiently designed hulls make the best use of the horse- power produced by a sail plan. clearly, the designers of the clipper and 2 is a typical keel design with a sweepback angle of about 400. the effect of sweepback angle and aspect . keel,. I'm going to use a straight rudder shaft (may require relocating the rudder tube) and glassing a semi-circular groove in the hull, i assume that the more it overlaps the shaft, and the closer it is to the shaft the less the drag.. Hi folks, i'm after some advice regarding a new keel. it's for a hartley 16, which is a 5m trailer sailer. upwind speed would be about 5kts. the original keel is a steel plate, 10mm thick..
Keel design is constantly evolving and nowhere is this more apparent than in modern racing yachts such as the imoca open 60 class. these fast offshore monohulls use highly sophisticated canting keels to help them stay upright when sailing upwind. the boats are designed to be as light as possible while at the same time […]. In the keel/hull junction the hull boundary layer is normally a few centimetres, for a 40 footer like the yd-40 around 5 cm. in the keel/wing junction the keel boundary layer is thinner, and a radius of about 1 cm seems appropriate. it is very important that the fillet is tapered off smoothly behind the trailing edge.. Suddenly it’s little wonder why this boat’s keel is so ineffective. the part that is hard for me to understand is why they chose to design a keel this way when there are plenty of superior shoal keel configurations – well beyond the keel centerboard. here is that old hunter i found in rock hall..
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