How To: Do Basic Tuning
These tips are based on the recommendations from Kean Rogers, also known as Roo. I think it is really accurate to start with, it helps me getting new gear going within a short period. Lots of experience is needed to get everything tuned up well. Proriders like Dunkerbeck and Maynard enter the water with often good tuning from start. I think the steps in this article will help most riders to achieve what pro's do.
Be aware this tuning is OK for most conditions, but for special conditions you will have sometimes to take another setup, but often this is little finetuning.
My comments are written in italics
Follow these steps:
1. Measure 30 cm in from the tail and measure the width of the board at this point.
2. Pick a fin with same depth as the width you measured and fit to the board. (start with a normal upright fin not a weedie). I often start with 2-3cm less than the width you measured, also I only use upright fins. A bit shorter fin is most of the time much faster on GPS, only average, upwind and crosswind speed will be less in some conditions.
3. Make sure the rear foot strap is mounted with the rear screw in line with the leading edge of the fin.
4. Set up the front foot strap by laying your arm on the board with the elbow bone in the middle of the rear strap and measure to the tip of your middle finger.
5. This point will be the middle of the front strap, mount the strap as close as possible to this position.Your board is now balanced to your body, the foot strap position will be different for each sailor.
A solution to put the straps back without an insert.
Once you’ve balanced your board it’s time to look at your rig. If you’ve set your sail up using the recommended mast and according to the measurements on the sail then it will be easy to balance it out.
1. Take your fin out of the board and connect your sail to the board with the mast foot in the center of the mast track.
2. Stand the rig up and with the board on a flat surface, i.e. grass or your board bag for protection, stand on the board with your feet either side of the mast foot.
3. Move the boom until its around shoulder to chin height.
4. Lay the rig down and measure from the front of the mast at the boom to the clew eyelet.
5. Divide this distance by three and measure from the front of the mast at the boom back this distance.
6. This is where the center of you harness lines should be. Grip the boom here with both hands thumb to thumb either side of your measurement point and place the harness lines either side of your hands.
7. To get the right harness line length grab the boom in the center of the lines and adjust the lines until they are just touching your elbow bone. For lightwinds I sometimes make the lines shorter, for real strong winds I do use longer lines
8. Most sails have their max draft around 33% so this is a good balance point for most sails. Downhaul, battens and outhaul influence the max draft, I often used less downhaul to move max draft forward.
9. With the board and rig still connected, lay the board on its side and the rig on the ground, tilt the rig towards the back of the board until the gap is even between the foot of the sail and the deck of the board.
10. Your mast foot is in the right position if you take a line perpendicular to the board, i.e. at a 90 degree angle, from a point midway between the front and rear foot straps and it lines up with the center of the harness lines. If the center of the harness is too far forward move the mast foot back, if its too far back move it forward. This is a good one, I mostly use a bit behind the midpoint between footstraps. It is hard to reach midpoint, but if you do it will be verrrry balanced loose and fast.
11. Put your fin in the board and go sail to see how it feels.
Now you have a reference point you can set the board at each time you sail, it makes it a lot easier to fine tune your equipment for optimum performance for the conditions.
Remember if you’re not fast…you’re last!
Erik is windsurfer for 10+ years. In his daily life he is professional in construction dewatering, advisor, troubleshooter. Erik likes adventures, explore and to challenge himself. During his life he is trying to get the best out of it and have respect for the earth, nature and future generations. The modern world is about sharing, in this blog Erik shares his experiences, selfreflection and lessons learned.
"Independent Guide for your Dewatering Site" Bemalingsadvies, Construction dewatering engineering and troubleshooting, Bronbemaling
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