background image

 

10).

 

Tie the halyard on to the head of the sail. Thread the jib sheet through the 
clew blocks on the sail. Attach the luff of the sail to the forestay using the clip 
on hanks. 

 

11).

 

Thread the lower end of the jib halyard through the double block on the fine 
tune system under the foredeck, and then up through the port side deck 
block, and cleat

.  

 

12).

  

Hoist the jib by pulling the halyard up through the deck cleat. You will need to 
ensure that the jib sheet is slack. Do not over tighten the jib halyard, you will 
need the travel on the fine tune system 

 

13).

 

Tension the luff using the 4:1 fine tune positioned under the foredeck.  

 
 

How to tune the mast before sailing. 

 
Once the jib is hoisted and the rig tensioned, you should check the rig settings as 
rigging lengths can vary and the shroud settings indicated above only give a 
guideline. A good sailing tension is 150 – 180 kg (285 - 400 lbs) measured on the jib 
luff wire. This is a lot of tension and will require quite a strong pull on the tension 
system rope. 
 
There should be at least 110mm (4.33”) of pre bend, which is controlled in the main 
part of the mast by the upper shroud tension. 

Note, the spreaders are positioned 

in a “safe” setting. Alterations are made at the owner’s risk – moving the 
spreaders to extreme forward settings may result in rig failure by the mast 
inverting downwind with the spinnaker up. 
 

The mast should look like this when correctly tensioned. 
 

 

 

 

Summary of Contents for VIPER 640

Page 1: ...VIPER 640 OWNER S MANUAL Rondar Raceboats Limited 5 STATION YARD EDINGTON WESTBURY WILTSHRE BA13 4NT Tel 44 0 1380 831138 Fax 44 0 1380 831444 ...

Page 2: ...e extra care as it will be slippery and potentially dangerous until these coatings wear off Ropes are also coated in release agents as part of their construction process so again take great care when tying knots or relying on lines to perform a specific function as they may undo themselves and get you into a potentially dangerous situation After sailing the boat for the first few times take a wren...

Page 3: ...igging the mast from new involves fitting the two halves together and ensuring that the halyards are not twisted This is very important to ensure smooth running of the halyards 2 Fit the spreaders by bolting them through the appropriate holes in the brackets The outer one goes through the aft hole in the bracket and the inner end is positioned as far forwards as possible ...

Page 4: ...tle rigging or white electrical tape 4 The standing rigging can then be fitted to the mast by inserting the upper ends T Balls into the Terminal sockets and attaching the upper shrouds to the end of the spreaders using the clevis pins Leave two holes showing on the spreader tip pin through the third hole 5 Take the dyneema keel hoist line and shackle it to the tang on the port side of the spreader...

Page 5: ...to position and that the deck control rope is loosened off When stepped visually check that the T terminals have not become jammed into the wrong positions when stepping 4 Attach the forestay to the aft hole in the stem fitting as above described securing it with clevis pin and split ring This should be taped as the spinnaker will contact this frequently You can then let mast lean aft The forestay...

Page 6: ... under the foredeck How to tune the mast before sailing Once the jib is hoisted and the rig tensioned you should check the rig settings as rigging lengths can vary and the shroud settings indicated above only give a guideline A good sailing tension is 150 180 kg 285 400 lbs measured on the jib luff wire This is a lot of tension and will require quite a strong pull on the tension system rope There ...

Page 7: ...tlement noise from the rig and hull odd creaks cracks groans etc This is quite natural and is because all of the separate components are bedding in and stretching or moving to their normal tensioned positions After the first few sails so long as you stay within the parameters described above this will stop Rigging the asymmetric spinnaker add a series of photos 14 Thread the spinnaker halyard in t...

Page 8: ...he chute by pulling on the downhaul at the block just aft of the spinnaker sock If the spinnaker will not stow away completely then check that the halyards and the sheets are un cleated Rigging the mainsail 17 Slip the clew strap around the aft end of the boom 18 Thread the outhaul through the clew eye and hook the end into the slot on the end of the boom 19 Ensure the boat is head to wind Tie the...

Page 9: ... the keel lift purchase blocks are not eased and that there is no slack or any loops caught in the purchase that may pull out and allow the keel to drop unexpectedly Keep your fingers and feet and all ropes and controls away from the keel slot and the top of the capping until the keel is fully lowered The boat will feel less than stable until the keel has been lowered at least half way down 24 Onc...

Page 10: ...into the gybe as the boom comes across so that the boat is travelling straight downwind as the sails fill on the new side Spinnaker drop Bear away onto a run again this is not necessary in light winds The crew should release the pole outhaul and the spinnaker halyard The middleman or the helmsman can then drop the sail retrieving it into the chute with the dousing line other end of the spinnaker h...

Page 11: ...f your Viper has been sailed in salt water wash it off thoroughly The fittings will also work better if regularly rinsed Damage Hull damage falls into three categories a SERIOUS e g A large hole split crack or worse Get the boat back to your nearest dealer don t be too distressed Most problems can be repaired by an expert b MEDIUM e g Small hole or split gel crazing If this occurs during an event ...

Page 12: ...effect of water leaving the trailing edge of the foil To ease this effect gently abrade the back edge of the foil approx 25 35mm 1 will suffice from top to bottom with progressively finer grades of sandpaper to sharpen the trailing edge of the foil A power sander is the quickest method it s not an issue if you penetrate the gelcoat but ensure the trailing edge is fair along its length You can also...

Page 13: ...e of the sail If your sail is stained in any way try to remove it using normal detergent and warm water Do not attempt to launder the sail yourself Repairs should be temporarily made using sticky number cloth or sail repair tape and then returned to the sailmaker for a professional repair Watch out for wear and tear especially around batten pockets and the bolt rope Replacement sails can be ordere...

Page 14: ... social life Please note that you do have to be an Association member in order to compete in class sanctioned events The Class Association also produces regular Newsletters organizes training events and hosts a highly popular forum at http forumViper640 org The International Viper 640 Class Association will be centred around the Viper640 org website Please use this site as a point of reference for...

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