Simple Tuning Guide



Mast Rake Use 22'4" as starting point + 1" depending on sail
(from masthead to transom)
 

Sail control If in doubt, let it out

Wind
(Beaufort)
Outhaul
(From band) 
Inhaul
(From mast)
Cunningham Boom off 
Deck
Helmsman Behind Thwart Traveller
Position
0-2 4 inches 3 inches off 12 to 15 inches Against it Boom end above gunwhale
2-4 4 inches 2 to 1 inches inch by inch 
to depower
9 inches down to 1 inch 5 inches 2 inches inside
4-5 1 inch to tight 0.5 inch 
to tight
open leach and smooth batten area just off deck 7 inches ease outboard 4 inches

 
Inhaul Controls bottom batten angle: pull tack to open lower leech and reduce weather helm; ease to flatten entry and point up. Experiment with tack and outhaul to understand effect on performance.

Cunningham Use to remove wrinkles in luff in light wind. Delay use as wind picks up but use to depower sail and then to open out the leech in strong winds.

Leech Shape Open and parallel to centreline in light winds. Should be then slightly closed to gain power and pointing before progressively blading out leech down to the boom in strong winds.

Mainsheet Ease in lulls and trim in gusts. In medium to strong winds, cleat it but avoid oversheeting and only ease in extreme wave conditions.

Rudder Gentle use in light winds, becoming frequent to keep boat driving as wind increases.

Boat heel 10 to 20 degrees in light winds but flat when any breeze.

Running All sail controls eased except in strong winds when sail should be flat. Plate should be mostly up, only being dropped half way when waves and wind dictate to gain stability. Kicker progressively tightened with wind. Helm moving aft to quarter deck to exploit waves.

Reaching Ease all sail controls. Don't over tension kicker but aim for both upper and lower luff telltales to react together.

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