When we go sailing, the boat may just push water out of the way (usually called displacement mode), ride on top of its own bow wave (planing) or foil. This week we look at how water resistance effects boatspeed, and what we can do to minimise this resistance.
We have recently completed the national games in Taiwan with a huge success. Our team won 7 out of 8 gold medals and a total of 16 medals out of 21 in the entire event.
The tuning of a boat involves gaining the optimum speed and height from a given rig on a given boat. If we change a hull, sail (main, jib, or kite) or mast we have to tune the sail to the mast and the rig to the boat, and often change our technique to optimise speed and height.
The Centre of effort of a rig can be best described by stating that the entire force of wind power generated by a sail can be considered to act through one point - in the same way that the center of gravity of a body is the point around which that body balances. In this blog, we explain the dynamics of the Centre of effort, how you can change it and WHY it needs changing, which is because if the center of effort of the rig isn’t directly over the pivot point of the boat, you need corrective rudder which will slow the boat down through drag in the water.