1- When the wind blows on a correctly trimmed sail the air flow separates and passes on either side of the sail.2- On the leeward side, the wind is accelerated by the built-in curve of the sail. This results in an area of low-pressure
3- On the Windward side. An area of high-pressure is created, thus creating an imbalance in air pressure.
4- This difference in air pressure actually pulls the sail into the wind.
Why we need Different Sail Sizes
Depending on where you are sailing, how much you weigh and what type of board(s) that you own, the sail type and size will vary. For now we’ll make suggestions with the assumption that you are a male of average weight (77gk – 170 lbs) possessing a “bring it on” learner who wants to progress quickly within the Montreal area.
A good all-round sail size to begin with for this weight and attitude will be between 6.5-7.5m to begin with. Now, as the wind increases it creates too much power and pull for the sail to be in control. The point at which this happens is very much dependant on your own bodyweight and strength.
A heavier and/or stronger sailor can hold bigger sails in stronger winds using their weight, strength and harness to balance themselves against the force of the wind.However, all windsurfers will eventually have to change down to a smaller sail as the winds increase in strength. So, different sail sizes exist for different conditions and wind ranges just like boards.
No comments:
Post a Comment