Optimist Tuning Guide
Use this guide for your basic settings then adjust them as you get more experienced to allow for your sailing style, the sail you use and your height and body weight.
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Wind Strength |
Upwind Light Force 1-2 |
Upwind medium Force 2-4 |
Upwind Strong Force 4-6+ |
Reach Light Force 1-2 |
Reach Medium Force 2-4 |
Reach Strong Force 4-6+ |
Run Light Force 1-2 |
Run Medium Force 2-4 |
Run Strong Force 4-6+ |
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Mast Rake
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Basic Setting 282-284 cms or 11-112 inches measured without kicker from top of mast to top of rear gunwale Sometimes radials might be a little more upright light to medium wind and a little further back medium to strong wind |
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Mast Ties |
Top and bottom eased to 6-7mm middle 2-3 mm off touching mast or if lazy all ties about 5mm off mast |
All ties 4-5 mm off mast personal choice |
All ties 3- 4 mm off mast or heavier sailors top and bottom ties just off mast middle ties 5-6 mm off mast |
Mast Sail ties twice round mast use 1.5 -2mm pre stretched cord. Top Mast, diagonal, tack and clew ties 3 mm cord around mast and boom 2-3 times.
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Boom Ties
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4-5 mm at the ends and up to 7-8 mm in the middle but make sure ties don’t stretch |
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Kicker
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Slack |
Just loose upwind and getting tighter |
Very Tight |
Slack |
As upwind lightweights tight |
Very Tight |
Slack |
As upwind lightweights tight |
Very tight or you won’t get downwind |
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Wind Strength |
Upwind Light Force 1-2 |
Upwind medium Force 2-4 |
Upwind Strong Force 4-6+ |
Reach Light Force 1-2 |
Reach Medium Force 2-4 |
Reach Strong Force 4-6+ |
Run Light Force 1-2 |
Run Medium Force 2-4 |
Run Strong Force 4-6+ |
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Outhaul |
Slightly tighter than eased |
Eased |
Firm but not tight as you still need drive in the sail |
All sails have a different foot lengths so you need to adjust your sail accordingly, mark your settings on your boom. |
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Luff |
Slack to keep draft back to allow pointing |
Slack to medium as wind increases to pull draft forward. If choppy firmer to give more power but less pointing |
Tighter to pull draft forward and open leach |
All sails are designed slightly differently some like a generally ‘softer’ luff tension and some like a generally ‘firmer’ tension. Check your sail tuning guide. Set luff tension using ‘twists’ boom and pin stop on mast. The diagonal tie setting is really, really important and make sure you replace it if it starts to fray. |
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Sprit |
Creases at throat |
Throat creases just disappear, lightweights need creases to depower the sail |
Tight or light weights might ease to show crease at throat |
In light to medium winds as you get more experienced learn to ease your sprit downwind and put it on again after you have rounded the leeward mark. |
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Mainsheet and Boom Span |
2:1 or 3:1 Maybe use lightweight 6mm sheet |
3:1 purchase 7-8 mm non absorbent mainsheet sheet |
3:1 purchase 7- 8 mm non absorbent mainsheet
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Generally the boom span wants to be tight, set the depth to about 80mm. Use a strop of upto 225mm or 11 inches between the bottom and top mainsheet blocks to reduce the amount of mainsheet you use and reduce windage. Bigger sailors can move the mainsheet position on the boom strop forward to nearly above the thwart to give more room to tack with out sinking the back of the boat |
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Wind Strength |
Upwind Light Force 1-2 |
Upwind medium Force 2-4 |
Upwind Strong Force 4-6+ |
Reach Light Force 1-2 |
Reach Medium Force 2-4 |
Reach Strong Force 4-6+ |
Run Light Force 1-2 |
Run Medium Force 2-4 |
Run Strong Force 4-6+ |
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Sheeting |
Boom just outside corner of boat. Keep leach telltales flowing |
Sheeted in to corner, ease in lulls. Keep leach tell tales flowing |
Sheeted into corner ease in gusts |
Keep telltales flowing |
Keep telltales flowing |
Keep telltales flowing |
Boom out 90 / 95 degrees |
Boom out to 90 degrees |
Boom out to about 80 degrees |
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Daggerboard [Mark positions on board] |
Down |
Down light weights can raise the board a little if overpowered |
upto 100 mm up even for heavier sailors if struggling to hold boat upright |
½ way up |
½ way up |
¾ way up |
Tip just showing or right up |
¾ up |
¾ up |
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Light Weight Sailing Position
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Progressively Kneel by mainsheet block, sit on Thwart then perch on side bum in shoulders out |
Sit on side bum in shoulders out Shoulders slightly back to lift bow over chop. |
Hike heaps, dynamic body movement shoulders to back of boat to get over each wave |
Sit on Thwart then perch on side |
Hike shoulders back slightly |
Hike heaps Slide forward to trim boat when planing |
Kite |
Kite less |
Keep boat fairly flat |
|
Wind Strength |
Upwind Light Force 1-2 |
Upwind medium Force 2-4 |
Upwind Strong Force 4-6+ |
Reach Light Force 1-2 |
Reach Medium Force 2-4 |
Reach Strong Force 4-6+ |
Run Light Force 1-2 |
Run Medium Force 2-4 |
Run Strong Force 4-6+ |
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Heavy Weight Sailing Position |
Kneel between mainsheet or Sit on thwart bum in shoulders out |
Perch on side bum in- shoulders out, start shoulders back to lift bow over chop |
Hike dynamically weight back to get through waves. |
Sit on Thwart then perch on side |
Hike shoulders back slightly |
Hike heaps Slide forward to trim boat when planing |
Almost fully Kited |
Fully kited |
Slightly kited/ Keep boat flat when windy |
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Steering |
Smooth, use body weight to steer , little use of rudder |
Smooth, still using body weight to steer- gradually use rudder a little to get through chop |
Use more rudder to sail through chop |
Smooth, use body to steer |
Smooth still using body to steer. Bear away in gusts, head up in lulls. |
Use a little more rudder Bear away in gusts, head up in lulls |
Smooth, use body to steer |
Smooth, use body to steer |
Use more rudder to sail through chop and catch waves-have fun |
Alan Williams October 2006