Slalom windsurf board
2012 XSR SLALOM OES Australia

The 2012 XSR Slalom boards have been based on 24 years experience of board building and design. The XSR model is a full Carbon, CNC Milled core, and a full veed bottom with a slight double concave in the nose to mid section. This aids turning and smooths the ride at full speed. The wide point is forward of centre to add volume and surface area where you need it, and to counter the reduced length. We are reducing surface area as much as possible from the wide point toward the tail. A parallel rail planshape gives greater control and speed, both in gybing and top end.
The bottom shape is as clean as possible, with NO cutouts ,wingers or double upwind rails. It just has a veed bottom with max depth vee and double concave just forward of centre. There is also a very small amount of flat panel vee out the tail to stop sideways slip at speed. It has a 700mm straight in the tail rocker, with a 17 cm nose rocker for better nose clearace in chop. The board can be pushed hard in real world choppy conditions. The rails are profiled fairly low at 25mm apex. This again is for greater control in high speed turning, without risking the rails planing out of the water during high speed gybes.
We always use a 3 mm deck concave to stop the lift from air flowing across the deck. This slighty lowers the mast base, which lowers the centre of effort from the sail to the board. The concave also stiffens the carbon deck, and acts like parabolic stringers that follow the planshape 122mm from the rail.