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Sailing Tips 

Below is a collection of Sabre sailing tips and youtube clips to help get you going faster.

The Gybe:-

 

Trial Switch Blade Design

 

Sabre Nationals

 

Traning Weekend Support Material

Attached is some great training material which has been gather from the Vic training weekend.

Many thanks to Russell for pulling it all together. Should be something in it to help everyone.

  • Fitness Article
  • Mike Fletcher Article 
  • Sailing - Business Case 

Basic Sail Settings for the Sabre

Sailing upwind, the optimum settings will depend on wind strength and the size and steepness of waves. 

In general, the aim is to have good boat speedusing a deeper sail shape in medium breeze, progressively flattening it off as the boat gets overpowered. Overpowered is when you continually need to ease the mainsheet to keep the boat flat. Unless you then change to a flatter setting, the boat will slow down because the sail is too full. You will notice that the boat goes out of balance and drags more on the tiller. 

In waves, the aim is to have a bit more depth in the sail to keep the boat powered up through the waves. You can make the sail progressively flatter and sheet tighter when the water is smooth, allowing the boat to sail closer to the wind whilst maintaining boat speed.

Light Wind Upwind.  Below 8 knots

Outhaul. Foot of sail about a hand width from the boom at the centre

Downhaul. Just enough tension to leave a few horizontal creases in the luff

Vang. Adjust so that it does not sag but has no tension.

Light Wind: Running and Reaching.

Outhaul. When reaching, release the outhaul to create more depth in the foot of the sail

Downhaul. Release to create more wrinkles

Vang: Just enough tension to prevent the top of the sail going forward of the mast running. Reaching set the top batten parallel to the boom.

Medium breeze Upwind. 8 to 15 knots

Outhaul. As for light wind

Downhaul. Enough tension to remove all horizontal creases.  Increase tension as wind increases. This allows the leech of the sail to release wind.

Vang. Increase tension as wind increases. 

Medium Breeze Running and Reaching.  8 to 15 knots

Outhaul: As for light wind

Downhaul. As for light wind

Vang. Keep similar tension to 8-15 knots upwind.           

Strong wind Upwind.  15 to 25 knots

Outhaul. Progressively flatten the bottom of the sail as you become overpowered.  Bar tight at maximum

Downhaul. Pull down increasingly hard as you become overpowered.  Really hard in 20 to 25 knots

Vang. Pull on increasingly hard as you become overpowered.  Really hard in 20 to 25 knots.

Strong Wind Running and Reaching.

Same as upwind settings but release the downhaul. 

General.

Don’t forget to change to upwind settings before you go back up wind.  Change back BEFORE the bottom mark.

Sail Control

To many of us, sails are a mysterious source of power…they can look good but slow and other times, ratty but fast. Often the difference between the top sailors and the rest is the ability to recognise when they are sailing fast and be able to reproduce fast settings for different wind and sea conditions.

Most sailors can change settings often enough to hit on good speed, but the top sailors also know when to stop and start sailing…all the adjustments in the world won’t make any difference if you don’t start properly, pick the right windshifts or keep the boat in correct trim.

Generally sails should be rather flat in very light winds (to reduce drag), fuller in moderate winds and flat in heavy winds.

Sail Camber and Sail Twist.

Camber and twist (leech profile) are equally vital to boat speed.

Sail Camber:

Camber has two aspects which you can vary…depth ie. How full the sail is, and position along the chord of the deepest point. You can see how full a sail is by looking up at the curvature of the seams.

Controlling camber.

The depth of curvature is varied by increasing the tension of the cloth across its chord - by vang, outhaul and by mast bend.

The position of the deepest curvature is varied by tensioning the downhaul (Cunningham Eye) or the vang.

The point of greatest curvature moves towards the area of tension.

Increasing pressure on the luff via the downhaul moves the centre of pressure forward; increasing the pressure on the leech via the vang will move the centre of pressure aft.

Downhaul (luff tension)

Basically, increased luff tension does not flatten the sail; it moves the point of maximum camber forward and straightens out the aft section of the sail…it frees the leech. It has an important effect on weather helm and therefore pointing ability.

  • Free leech - equates to light helm, less pointing, more speed.
  • Tight leech - equates to heavy helm, more pointing, less speed.

Easy adjustment to the downhaul is important.

Note: not keeping the boat flat will cause weather helm, so get it flat before making adjustments.

Outhaul

Easing the outhaul increases low down fullness. It also increases weather helm by powering up the bottom battens and exhausting the air more to windward.

Changing this setting by 10 cm can increase pointing by 2 or 3 degrees.

Mast bend

Sailmakers have two basic methods of cutting draft into a sail.

  1. By cutting the sail profile with round to the luff. This excess material in the sail converts to draft when the sail is attached to a straight mast. If draft was only achieved by this method, the flow would be too far forward for efficient sailing.
  2. By using seam taper to bring the flow aft. Round is cut into the edge of panels prior to sewing them together. Draft is positioned towards the centre of the sail. The balance of the luff round to seam taper is a very fine line.

Mast bend changes sail camber by sucking out material from the luff of the sail.

Shape for conditions.

Light wind - sail should be flat with the draft/flow (maximum depth) positioned around 45%-50% aft of the mast. This allows the weak breeze to move easily across the sail surface without stalling. Don’t worry about wrinkles down the luff.

Moderate wind - sail should be full and the draft brought forward to around 40%-45% to provide more power.

Strong wind - sail should be flattened with the draft at about 33% aft to reduce heeling and make the boat more manageable.

Twist:

Twist in aerodynamic terms, is angle of attack and is more difficult to appreciate than camber. The amount that the leech twists away from clew to head is vital to speed.

Too little twist is a sure way of going slow.

Controlling Twist

Twist is controlled by mainsheet, vang and traveller.

  • Mainsheet

Controls the rate at which the leech falls away to leeward. A good starting point is to trim the top batten parallel to the centreline of the boat.

  • Vang

The vang does a couple of things and is one of the most important controls. Firstly, it bends the mast low down by pushing the mast forward at boom level. With the vang and outhaul, the lower camber can be finely controlled.

In heavy wind, a large amount of vang can flatten the bottom sections. A good indicator of the required vang tension is the appearance of one or two creases from the clew to the middle of the sail towards the point where the second top batten meets the mast.

This throws the bottom batten off to leeward, reduces excessive weather helm and generally frees the boat from that clogged up feeling.

The vang also controls twist, and it is this for which it is mostly used…especially downwind.

  • Vang Settings

As a starting point, tension so that the upper leech telltale (between top and 2nd battens) just streams aft, while the lower telltales are just on the verge of lifting.

The upper leech telltale is the most important and if the boat feels chocked or speed drops off, check that it is not stalled…immediately ease the mainsheet until it flows and then tension until it is just flipping off.

  • Traveller (mainsheet hawse)

The traveller controls the overall angle the sail meets the wind…angle of attack. The lift generated by a sail is varied by changing draft or the angle of attack.

 

 

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