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To ensure that the sail is not twisted, run your hands up the red luff tape on 
the spinnaker until you reach the head of the sail, then tie the spinnaker 
halyard on to the head of the sail.  
 
Tie the middle of the spinnaker sheets to the clew of the sail. Lead the ends 
through the blocks amidships on the gunwhales, and then forwards to the 
ratchet blocks near the shroud plates (ensure you thread it the correct way 
through the ratchets, which only work under load), and tie the ends together. 

 

The spinnaker halyard tail (spinnaker downhaul) comes from the chute 
mouth, leads through a loop on the lower third of the spinnaker and ties onto 
the webbing strop on the top third of the sail. 

It is a good idea to tie it on with 

a long loop, say 300 mm (12”) here, as it makes the spinnaker enter the chute 
more easily when dropping.  
 
The safest and easiest way to rig the downhaul is to pull the pole right out, 
and to pull the port sheet tight into the ratchet and to cleat it off. If you then 
hoist the spinnaker until the head is about 2 metres off the ground you can 
then see the two attachment points on the spinnaker. You can then thread the 
spinnaker downhaul under the foot of the sail and sheets, up through the 
lower ring, and tie it to the top loop.     

 

 

16).

 

You can then pull the spinnaker into the 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 main halyard to the head of the sail 

with a VERY short bowline or a dinghy hitch and hoist the mainsail. Pull the 
halyard tight through the cleat to ensure all slack is removed and the main is 
fully hoisted. Make CERTAIN you do not hoist the main halyard slipping 
through the cleats as this only wears them down limiting their holding power. 
Place the halyard next to the cleats to hoist then simply slide it into the cleats 
once the halyard is FULLY hoisted. 

 

20).

  

Fit the boom onto the gooseneck, and fit the two webbing tack straps around 
mast. Tension the outhaul to sailing position. 

 

21).

  

Thread the cunningham line through the cringle above the tack and tie the 
end around the gooseneck fitting. 

 

22)

  

Attach the gnav upper strut to the upper mounting post, and fit the gooseneck 
retaining pin to prevent boom pulling off.  

 
 
Rudder  
 
23).

  

The rudder blade simply slots into the transom gudgeon AFTER launching 
(prevents rudder damage) and has a retaining clip to prevent accidental 
dislodging. It is sensible to also tie the rudder on in case of accidental 
removal, during a capsize for example 

 

 

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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