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cammd said..Basher said..
People think that harness line length is a function of harness hook height and of boom height. In fact it's actually more about your sailing stance.
Sailing stance is then a function of footstrap position, mast foot placement, and boom height. Hook height makes little difference in this when you sail with a modern stance.
For example: If you use too much mast rake and drive your board heavily off the back foot then you have an old-school stance that typically drops the boom too low where you hook in - and that's why you then feel you need shorter lines.
With a more upright stance, the mast is more vertical, the front footstrap is probably nearer the mast foot, and the mast foot itself is probably in the centre or rear half of the mast track. The pull on the harness lines is then outwards and less upwards, and harness line length is then a simple function of your arm length.
So, even as a short arse, I'm on 30 inch lines. If you are 6 foot then you probably should be on 32s or 34s.
I'm not the sort of person who is going to tell anyone else how topsail their gear. But if you want to change harness line length used then think about the stance issues above. A modern upright stance helps you drive the board more off the front foot, and with balanced load over the fin(s).
It takes a while to adjust to longer lines, so you need to stick with the change for a while before simply reverting back to what you are used to.
I don't get why an upright stance is more modern, seems to me an upright stance keeps the centre of effort forward which makes sense regarding driving more off the front foot as the centre of resistance needs to be in balance so therefore it is more forward as well. But doesn't that increase the wetted surface area of the board.
Would just depend on the style of sailing your doing or even the point of sail your on as to whether that is a better stance than raked back and driving off the fin.
Just get a good set of racing adjustable lines and set the length as required
I guess I look at this the same way i look at sailors of differing abilities and different experience on the water where I sail.
Firstly you get those who are still learning and who tend to be terrified of catapulting, so they stand too far back on their boards, and stick their mast foot too far forwards in the mast track - falsely thinking that will 'hold the nose down'. Invariably they need an oversize fin in the back of the board to compensate for all that backfoot weight.
Then you get those guys who have been sailing for years and who are often stuck in a stance rut - and it's usually they who have short lines, to match a sailing stance where they rake the mast back and drive the board hard off its tail until it spins out. You can still go fast like that but you don't have much control, and it's not a great stance for gybing either.
A more upright stance gives you the freedom to drive the board and to change trim perhaps in response to waves, chop or gusts. The longer lines mean you hold the rig more at arms length and that means you are less likely to choke the rig.
An upright stance also means the pull of the lines is more outward and that often means you solve all those issues about waist harnesses riding up.
Longer lines work for all types of windsurfing - racing, slalom, speed, waves, and freestyle. For speed, you can still drive the board off the fin and fly the hull off shorter wetted area, and you might find you can use a shorter and faster fin.