Summary:- Set a running rig. Lead braid on braid sheets to the deck blocks and Lewmar winches.
Clip the outhauls into the Harken spinnaker pole end fittings. Stop death rolling.
   
Setting the Twizzle Rig
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The Twizzle Rig can be set up by one man on the foredeck and another crew in the cockpit tending the sheets. It took about fifteen minutes to rig at sea.

To Set the Twizzle ( Twistle ) Rig -

Unfurl the twizzle jibs a bit

Rig the downhaul block and strop at the bows and release the twizzle sheets and outhauls from their stowed position on the pulpit.

Attach the universal joint to the uphaul and downhaul and leave slack on the deck by the mast.

Unfurl the jibs a turn or two to make sure the jibs are the correct side and sheets/outhauls clear. Lead the sheets to the sheet winches.

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pole end with outhaul tensioned and sheet lead aft

Take the first pole.
Clip outhaul into pole end fitting and run pole out to the clew. The bowline on the outhaul will prevent the pole going right to the clew but will be near enough. Make off outhaul to the cleat on the inboard end of the pole.

Clip pole to universal joint. Rest end on deck and lightly lash to mast. Depending on the length of the poles, the universal will usually be aft of the mast at this stage.

Repeat for the other jib and pole. Both poles are now fore and aft.


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the universal joint and poles

Raise the universal joint and tension the downhaul till the universal joint is clear ahead of the mast and at a height above the level of the clews. To allow this to be done, the furling line may need to be eased again to allow the jibs to unfurl some more.

Loosely make off the universal joint preventer.

Haul in on the jib sheets evenly while easing out the jib furling line. This is really a two man job. With both jibs spread, the twizzle rig is now set.

Trimming the twizzle rig

The poles should be sloping down and veed forward to the clews.

The jibs set well up to 60 degrees each side of a dead run. Just ease the windward sheet and harden the leeward sheet a foot or two as one would do with a spinnaker.

You will see how the surface of the sea is dappled by the downforce off the jibs. This indicates a good lifting force to the bows.

It has been written that the twizzle rig stops all rolling. This is not true. What it does stop is the dreaded continuous 'death rolling' of a twin jib or main and jib goosewinged rig. The yacht will roll as it drops off a cross swell but the twizzle rig dampens it after three or four swings with the universal joint swinging across the deck spilling some wind from one jib and then the next. See the video clip twizzle.mpg
However, we did find that at exactly 4.8 knots on the log the rolls would continue far longer - up to 15 or so 'pendulums'. Many a happy hour was spent trimming the rig to prevent this but without success. It was as though the rig, hull, sea state and wind strength had reached a harmonic state and one of the 'ingredients' had to change to break out of it. At 5 knots the problem would cease.

As the wind freshens, the jib sheets can be eased and the jibs rolled up. No adjustment is required to the up/downhaul - the poles simply vee more. Reefing can continue from the cockpit till just a pair of 'ears' are showing, veed downwind like a dart which gives excellent directional stability.

Striking the twizzle rig

Basically the opposite of setting the rig.

Ease sheets and roll up the jibs from the cockpit till the poles are roughly fore and aft.

Go on deck and lower the universal joint to the deck. Lightly lash to the mast to stop the poles rolling about.

Release one pole from the universal, let off the outhaul and run the pole aft. Unclip the outhaul from the pole end and stow the pole. Sheet in a bit to stop the jib 'ear' flapping. Repeat for the other pole.

Ease sheets and fully roll up the twizzle jibs.

Go to the bows and clear away the downhaul. Coil up the sheets and outhauls and stow on the pulpit port and starboard.

Make fast the uphaul and stow the universal joint with the downhaul and preventer.

For Windward Work

If she has two jib furling gears then the fore or outer gear can carry the twizzle jibs and the inner gear the genoa.

If she has one furling gear, there is an alternative to changing sails on the foil on a frisky foredeck. The twizzle jibs can be sheeted as one. However, with a high cut twizzle jib, it is difficult to reach the furled clews to change sheets. On Alma I could just reach them when standing on the pulpit but that was rather hairy on a plunging deck. On a bigger craft it may be a bosun's chair job to reach the furled clews - no joke in 6m / 20 foot swells.

On Alma, the clews could just be reached so the twizzle sheets and outhauls were removed. A short rope strop with a block running on it was made fast to each clew. A pair of jib sheets were tied to the base of the block and run port and starboard. The block running on the strop equalised the tension on each clew. As the sails were not quite the same size, the clews were in different positions when sheeted in and this method gave a good enough set to sail 'full and bye' and certainly close winded enough to claw off a lee shore. We only used this in practice just to prove its value as Alma had a genoa and the twizzle jibs on their own dedicated furling gear foils.

On a larger craft, or where the clews are cut so high they cannot easily be reached, another method can be employed using the twizzle sheets and outhauls.
Make the twizzle jib sheets as long as a normal sheet. Bend on some extra line to make each outhaul as long as each sheet. Lead the sheet of the port jib though the sheet block to the port sheet winch as normal and pair with the 'outhaul/lazy sheet' of the starboard jib run also to the port side but not using a sheet block if none spare, and vice versa.

On the wind on port tack, the port jib is sheeted hard in on the winch while the starboard jib lays over the port jib and is held in place by high wind pressure and some tension on the 'outhaul come sheet' but not needing the winch or a sheet block on a car for sail shape.

Going about, let off the 'outhaul' on the 'lazy' starboard jib first, then the port jib sheet as she goes past the wind. Haul in on the starboard jib sheet with the winch then smooth in the port jib, now the 'lazy jib', resting on the starboard jib and tensioned a bit by its 'outhaul come sheet' direct to a spare cleat.

 


More ...

A description of the setup, setting and striking...
The equipment used for the twizzle rig...
Video clips and picture gallery...
More development information and experience...


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last modified : 30th. August 2004

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