Nacra F20 Carbon Assembly & Rigging Manual
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Nacra F20 Carbon Assembly & Rigging Manual

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  • Page 2: Table Of Contents

    Table of content Introduction ____________________________________________________________________________________________ 5 Part 1. Assembly ________________________________________________________________________________________ 6 1.1. Tools needed for Assembly ___________________________________________________________________________ 6 1.2. Glossary __________________________________________________________________________________________ 6 1.3. Hulls _____________________________________________________________________________________________ 7 1.3.1. Mounting the beams _____________________________________________________________________________ 7 1.3.2. Fixing the mast rotation cleats _____________________________________________________________________ 8 1.3.3.
  • Page 3 1.8.1. Spinnaker sheet ________________________________________________________________________________ 35 1.8.2. Spinnaker retrieve block _________________________________________________________________________ 35 1.8.3. Tack release line and tack line ____________________________________________________________________ 36 1.8.4. Jib sheet _____________________________________________________________________________________ 37 1.8.5. Mast rotation __________________________________________________________________________________ 38 1.8.6. Righting line __________________________________________________________________________________ 39 1.8.7. Mainsheet ____________________________________________________________________________________ 40 1.8.8. Mainsail traveler _______________________________________________________________________________ 42 Part 2.
  • Page 4 2.3.8. Mainsail outhaul _______________________________________________________________________________ 65 Tuning guide __________________________________________________________________________________________ 66 3.1. Mast rake _________________________________________________________________________________________ 66 3.2. Spreader rake _____________________________________________________________________________________ 66 3.3. Diamond tension ___________________________________________________________________________________ 67 3.4. Side stay tension ___________________________________________________________________________________ 67 3.5. Rudder rake _______________________________________________________________________________________ 67 Front beam pre-bend ________________________________________________________________________________ 67 Maintenance __________________________________________________________________________________________ 68 Warranty ____________________________________________________________________________________________ 69 Dealer Support ________________________________________________________________________________________ 69...

  • Page 5: Introduction

    Introduction Thank you for buying your new Nacra F20 Carbon! This manual covers everything you need to know about assembling your new Nacra. Familiarize yourself with this complete manual to help ensure proper assemb- ly and maintenance. This is a two part manual. If you take your boat out of the box you have to begin with the ‘Part 1.

  • Page 6: Part 1. Assembly

    Used Terms Part 1. Assembly This part of the manual is only for people who get their boat ‘out of the box’ and have to assemble their boat completely. If your boat is already Bow: Front of the boat assembled by your dealer, you can continue with Part 2. Rigging. Batten: Thin strip in the sail Bridle wire: Wire that connects the bow and forestay 1.1.

  • Page 7: Hulls

    1.3. Hulls 1.3.1 Mounting the beams Step 1. Place the starboard and port hull box next to each other and make sure that the hulls are facing the same way. Mounting the beams Step 1 & 2 Step 2. Position the hulls approximately 3 m apart from each other. Be careful not to scratch the boat, so it is best to use hull supports and a cattrack or the sup- ports in the hull box, by cutting the excess cardboard away.

  • Page 8: Fixing The Mast Rotation Cleats

    Step 5. After hand tightening the bolts, work your way around the boat and tighten all the beam bolts to about 24 Nm on the torque wrench. Do not exceed the recommended 24 Nm as over tightening results in damaged threads. Step 5 1.3.2 Fixing the mast rotation cleats Get the two mast rotation cleats from the rigging box and screw them in the...

  • Page 9: Front Beam Pre-Bend

    1.3.4. Front beam pre-bend There should always be pre-bend on the front beam. This is done by tensio- ning the pin of the dolphin striker. After each session the first three ti- mes the boat is sailed the following procedure MUST be completed (with the mast taken off!): Dolphin striker pin Step 1.

  • Page 10: Trampoline

    1.4. Trampoline 1.4.1. Fitting the trampoline Step 1. Slide the front edge of the trampoline into the slot in the front beam. The foot straps should be facing up. Make sure the trampoline is in the middle of Trampoline the catamaran. Step 1 Step 2.
  • Page 11 Step 3 Step 4. Tighten the rear lacing line firmly and then tie it down at the end. Step 4 Step 4...
  • Page 12 Step 5. Take one of the side lacing lines and tie it down onto the first trampoline spanner band. That is the one closest to the front beam on either side of the boat. We take the other end of the lacing line and take it around the first button on the hull.

  • Page 13: Fixing The Foot Strap

    1.4.2. Fixing the foot strap Step 1. Tie the middle foot strap into place firmly Fixing the foot straps Step 1 1.4.3. Trapeze shockcord Step 1. The trapeze shock cords for the crew are already put in the front beam and need no attention.

  • Page 14: Spinnaker Block

    1.4.4. Spinnaker block Take a block from the box and tie it onto the trampoline using a small rope. Make sure you do two loops! Look at the picture for the location. Spinnaker block Make sure to do two loops and tighten it firmly!

  • Page 15: Spinnaker Pole

    1.5. Spinnaker pole 1.5.1. Fixing the snuffer ring and shute Step 1. Slide the spinnaker shute through the snuffer ring. Spinnaker pole Step 1 Step 2. Place the spinnaker pole horizontal. This means that all of the already moun- ted fittings and blocks are on top and standing vertical. 135 cm from top of pole Step 3.

  • Page 16: Mast

    1.6. Mast Masts should be regularly inspected for water tightness and diamond wire wear. Make sure fittings are sealed with silicone. Replace wires that show any signs of wear. Check diamond wire attachment points, turn buckles and seizing wire. These areas could cause serious mast failure! Mast base and diamond wires Step 1 1.6.1.
  • Page 17 Step 3. Turn the second diamond wire in the brass diamond adjuster block. This will be slightly more difficult than the first diamond wire, since the other diamond wire is already fixed. To make things easier let one person turn the diamond Step 3 wire at the end and let the other person turn the diamond wire in the brass diamond adjuster block.

  • Page 18: Fixing The Diamonds

    Step 5. Grease the diamond adjuster bolt, place the washer and put the bolt through the mast base. Then turn it in the brass diamond block, but only get the th- read started. We don’t want to put tension on the diamond wires, since we Step 5 still have to attach them in the top.

  • Page 19: Spreader Arms

    Step 2. Place the diamond wire onto the diamond wire connector and attach it with a clevis pin and ring. The ring should be on the outside. Don’t forget to tape the ring! Step 3. Step 2 and 3 Put some wear tape under the diamond wire connector. Then bend the dia- Tape the ring mond wire connector to the mast again.
  • Page 20 Step 3. Measure the distance from the beginning of the spreader bar adjuster screw to the beginning of the spreader bar. This distance should be 59 mm on both spreaders for now. This is a very powerful trim option on the boat and regu- lates the spreader rake.
  • Page 21 Step 6. Slide the diamond wires into the corresponding slots at the end of the sprea- ders. Make sure the diamond wire is completely in the slot! Step 6 Make sure the diamond wire is completely in the slot! Step 7. Secure the diamond wire onto the spreader with the thin wire.

  • Page 22: Making Sure The Mast Is Straight

    Step 9. Put tension on the diamond wires by screwing in the mast bolt. Measure the tension on the diamond wires with the loose gauge. This value should be about 38. More tension means more pre-bend in the mast and that means less pressure in your sails.

  • Page 23: Spinnaker Block

    1.6.5. Spinnaker block Step 1. Take the spinnaker bale line and a block. Slide the spinnaker bale line in one of the pre-drilled spinnaker bale line holes and let it come out in the hole on the other side. Tie a figure 8 knot to prevent it from sliding back again. Step 9 Step 2.

  • Page 24: Mainsail Halyard

    Step 4. Tight line! Take the spinnaker block line and tie it to the top of the block. Tie the other end to the eyelet in the top of the mast. Make sure this line is tight when the spinnaker halyard block is pulled down. Test this by pulling the block down. Step 5.
  • Page 25 Step 3. Tie a figure 8 knot at the bottom of the mast and tie the other end of the halyard to the eyelet on the metal halyard locking ring. Do this with a figure Step 3 8 knot. Tie everything to the mast. Step 3...

  • Page 26: Fixing The Stays

    1.6.7. Fixing the stays Step 1. Take the big shackle, the forestay, two side stays and plastic washers from the box. Step 2. Fixing the stays Place the forestay in the shackle and make sure the part of the fore stay with Step 1,2 and 3 the ring is on the bottom.

  • Page 27: Adjustable Trapeze Units

    Step 3. Tie one end of the jib halyard to the top of the jib halyard S-hook. Put the other end through the pre drilled hole in the S-hook and tie a 8 knot. Step 3 1.6.9. Adjustable trapeze units Step 1.

  • Page 28: Fixing The Trapeze Wires

    Step 3. Put the adjustable trapeze line through the clam-cleat and trapeze block in the way shown on the pictures. Mount a shackle on top of the clam cleat. Step 3 Step 4. Repeat this for all 4 adjustable trapeze units. Step 4 1.6.10.

  • Page 29: Cleats

    Step 3 Step 3. Attach the adjustable trapeze units to the bottom of the trapeze wires. Tigh- ten all the shackles firmly and put tape around them. Spinnaker 1.6.11. Cleats Cunningham (2x) Step 1. Attach the two cunningham cleats on the mast. Cleats Step 1 and 2 Step 2.

  • Page 30: Cunningham

    1.6.12. Cunningham Step 1. Put the cunningham line through the double pulleys and the mast base as shown on the picture. Make sure the lines don’t cross. In the end you should have two ends on both sides of the mast coming out of the cunningham Cunningham cleats.

  • Page 31: Rudders

    1.7. Rudders Step 1. Put your boat on high supports or the trailer, because we are going to put the rudders on the boat. They should also be able to lock down. Then slide your rudders on the rudder pins on the stern. The bent rudder arms should be facing inboard.
  • Page 32 Step 5. Unscrew the two phillips screws on both ends of the crossbar and place the crossbar over the two rubber rods on the tiller arms. Make sure the hardwa- re for the joystick is on top. Don’t put the phillips screws in yet, because we need to align the rudders! Step 5 Step 5...
  • Page 33 Step 6 Locking the rudders part 2 The rudder is now locked. Step 7 Measure the distance between the port and starboard leading and trailing Step 7 edges of the rudder blades. The trailing edge should be 2 mm more out than Measuring the leading edge the leading edge.
  • Page 34 Step 8. When the rudder alignment is correct, predrill holes into the rubber rods and install the phillips screws into the rubber rod to lock the position. Make sure the length of the rubber rods on both ends are about equal. Step 8 Make sure the rod lenght is about equal on both sides!

  • Page 35: Ropes And Halyards

    1.8. Ropes and halyards 1.8.1. Spinnaker sheet Step 1. Take two blocks and the spinnaker sheet blocks. Install the two blocks on the front beam and install the spinnaker sheet blocks on the hulls. Connect the two blocks with the short shock cord supplied. Spinnaker sheet Step 1, 2 and 3 Step 2.

  • Page 36: Tack Release Line And Tack Line

    Step 2. Put both ends of the shockcord through the holes on each rear side of the trampoline. Make sure you go under the foot strap! On the starboard side you also have the tack line shock cord running through the hole in the tram- poline.

  • Page 37: Jib Sheet

    Step 4. Tie a block to the stay adjuster/staymaster with the red trampoline block tie line. And take the tack line through the block. Step 5. Go under the trampoline with the tack line, going through the slot between Step 4 and 5 the trampoline lacing line and the trampoline next to the mast rotation cleat.

  • Page 38: Mast Rotation

    Step 3. Take the thin jib sheet from the box and tie one end to the block on the jib track. Also connect a shackle to a block and put the thin jib sheet through this block. Jib Sheet Step 3 and 4 Step 4.

  • Page 39: Righting Line

    Step 2. Go under the trampoline with the rotator line, by going through rotation block and then through the slot between the trampoline and the lacing line. Step 2 Step 3. Go through the big hole in the middle of the trampoline and put the rest of Step 3 the line in the trampoline bag.

  • Page 40: Mainsheet

    Step 2. Take the other end through the hole in the trampoline and tie a figure 8 knot directly above the hole, to prevent the righting line from accidentally sliding through the hole while sailing. Step 3. Step 2 and 3 Put the rest of the line in the trampoline bag.
  • Page 41 Mainsheet Mainsheet Mainsheet Mainsheet...

  • Page 42: Mainsail Traveler

    1.8.8. Mainsail traveler Step 1. The main sheet and the traveler on the Nacra F20 Carbon are made out of one single rope. Take the loose end of the main sheet and put it through the cleat and the blocks on the traveler cart.

  • Page 43: Part 2. Rigging

    Part 2. Rigging The manual now continues with the boat as we left it in Part 1, so if you don’t exactly know how everything was supposed to be just check it in Part 2.1. Raising the mast Preparing Step 1 2.1.1.

  • Page 44: Fixing The Stays And Trapeze Wires

    2.1.2. Fixing the stays and trapeze wires Step 1. Attach the bottom of the sidestays to the staymaster. Make sure the stay- master is at its maximum length, that is number 10. Fixing the stays and trapeze wires Step 1 Maximize staymaster lenght Step 2.

  • Page 45: Spinnaker Halyard

    2.1.3. Spinnaker halyard Step 1. Take the spinnaker halyard and go to the mastbase. Take the thin end of the halyard and go through the spinnaker hoist block. Spinnaker halyard Step 1 Step 2. Go through the gap in the right rake adjuster bars with that same end. Go through the slot at the starboard side of the mast! Step 2 Starboard side!

  • Page 46: Raising The Mast

    Step 4. Take the end of the halyard through the block in the top of the mast from the inside to the outside of the mast. Step 4 Line end Step 5. Take this end down again and tie it to the spinnaker halyard block. With the other end you can tighten the line, cleat it in the spinnaker hoist block and then put the rest of the line in the trampoline bag.
  • Page 47 Step 3. Check that all the stays and trapeze wires are free of obstructions. Also check that the jib halyard is free. The person at the mast base takes a trape- ze wire to help the person at the back with raising the mast. It is best to put your foot on the mast base to prevent it from coming off the ball.
  • Page 48 Step 5 Step 6. When the mast is in upright position one person pulls on the trapeze wire to keep the mast up. The other person fits the forestay in the forestay adjuster Step 6 with a clevis pin. When you do this for the first time, fit the clevis pin in one of the holes.

  • Page 49: Lowering The Mast

    2.1.5. Lowering the mast Step 1. Lowering the mast the first time it is best to be with three persons. We will tell you how to do it with two people. Make sure the mast is on level ground or if that’s not possible make sure the Lowering the mast bow is downhill to make it easier to lower the mast.

  • Page 50: Rigging The Boat

    Step 5. When the mast is lowered, make sure the mast is properly supported to pre- vent it from scratching your boat or beams. Step 4 and 5 Support the mast 2.2. Rigging the boat 2.2.1. Spinnaker pole Step 1. Spinnaker pole Step 1 Take the spinnaker pole and put it through the middle spi pole bridles that...
  • Page 51 Step 2. Attach the spinnaker connector rod hanging under the forestay to the con- Step 2 nection point near the middle spinnaker bridle wires. Make sure to tape the ring! Step 3. Connect the two spinnaker pole bridle wires on the front end of the spi pole to the hulls with two clevis pins.

  • Page 52: Jib Sheet

    2.2.2. Jib sheet Step 1. We previously put the end of the jib sheet in the trampoline bag and already tied the other end down to a pulley on the jib track. Take the end from the trampoline bag and put it through the pulley on the spinnaker pole. Jib sheet Step 1 Step 2.

  • Page 53: Tack Line

    2.2.3. Tack line We previously put the end of the tack line in the trampoline bag. Take this end through the pulley on the end of the spinnaker pole. Be sure to go under the bridle wires. Tack line 2.2.4. Jib traveler. One end of the jib traveler should already be attached to the jib track.

  • Page 54: Boom

    Step 2. Pull on the blue line that comes out of the front beam and you will find that is tied onto a shockcord. Tie the cunningham line to that shockcord and then untie the blue line. The cunningham line can now go into the front beam while sailing! Step 2.

  • Page 55: Spinnaker Halyard

    Step 2 Step 3. Go through the mast rotation cleat again and tie it down to the staymaster. Step 3. 2.2.8. Spinnaker halyard Step 1. The spinnaker halyard has already been put through the pulley in the top of the mast so we have the two ends at the mast base. Step 2.
  • Page 56 Step 5. Take the halyard through the spinnaker shute and then go through the snuf- fer ring. Tie the end down to the spinnaker pole. Tie the other end to the spinnaker pole. Step 5 Step 5 Step 6. Take the spinnaker shute and attach the two shockcords to the trampoline. Step 6...

  • Page 57: Fixing The Sails

    2.3. Fixing the sails 2.3.1. Spinnaker Step 1. Take the tack of the spinnaker and tie the tack line to the ring as shown on the picture. It is best to fix the spinnaker on the port side of the boat. Spinnaker Step 1 Step 1...

  • Page 58: Raising The Jib

    Step 3. Take the other end of the spinnaker halyard and put it through the two rings in the spinnaker. Then tie it down to the top path as shown on the picture. Step 3 Step 4. Follow the trailing edge of the spinnaker, take the clew of the spinnaker and then tie the spinnaker sheet down to it as shown on the picture.
  • Page 59 Step 4. Hoist the jib and close the zipper at the same time. When you are nearly the- re look up to the jib halyard ring and hoist the S-hook through the ring and a bit further. Then pull the jib down a bit to lock it in the ring. The S-hook has now locked the jib.

  • Page 60: Lowering The Jib

    Step 7. Take the pulley with the shackle near the jib track and attach it to the clew plate. Step 7 2.3.3. Lowering the jib Step 1. Undo the jib sheet and the jib cunningham. Lowering the jib Step 1 Step 2.

  • Page 61: Mainsail Battens

    2.3.4. Mainsail battens Step 1. We are first going to put tension on all the battens, starting at the bottom. Take the two batten tension lines from the sail and put them through the hole on the end of the batten. Mainsail battens Step 1 Step 2.

  • Page 62: Raising The Mainsail

    2.3.5. Raising the mainsail Step 1. Take the mainsail halyard and fix the shackle to the top of the mainsail. Ma- ke sure the knot in the mainsail halyard ring is facing the mast. Raising the mainsail Step 1 The knot should face the mast Step 2 Step 2.

  • Page 63: Lowering The Mainsail

    Step 3 Make sure the mast and the sail are facing the same direction while locking! Step 4. Put the tack of the mainsail in the mast rail. Step 4 2.3.6. Lowering the mainsail Step 1. Take the halyard out of the trampoline bag and take the cunningham off the sail.
  • Page 64 Step 2. The person with the halyard pulls on the halyard to raise the sail a bit and holds the halyard tight. This will put the ring above the locking system. Step 3. The person at the mast then twists the mast at right angle with the sail and Step 2 and 3 pulls the sail down.

  • Page 65: Mainsail Cunningham

    2.3.7. Mainsail cunningham Mainsail cunningham Take the end of the short cunningham line and take it through the pulley on that side of the sail. Then take it through the clamcleat on the bottom of the Pulleys mast. 2.3.8. Mainsail outhaul Take the outhaul line and tie a 8-knot on one end.

  • Page 66: Tuning Guide

    3. Tuning guide 3.1. Mast rake The basic setting is the upper screw of the rudder spring on the transom. To measure, do this: Step 1. Mast rake Step 1 and 2 Untie the shock cord of one of the trapeze wires and extend the trapeze wire with a piece of rope of about 1 meter.

  • Page 67: Diamond Tension

    3.3. Diamond tension To measure the tension of the diamond wires we use a Loose & Co tension gauge which you put onto the wire and let go. This one gives you the most accurate readings. The number that we work with, on this tension meter is: Diamond Tension 3.4.

  • Page 68: Maintenance

    Periodically check for and replace frayed, worn, or kinked wires, shock- cords, and lines.  Avoid storing your Nacra for long periods of time with the rigging ten- sioned to race settings (very tight.)  Check all shackles, clevis pins, and fasteners for loosening or wear.

  • Page 69: Warranty

    6. Dealer Support Nacra’s dealer network is famous for its service. The dealer can help you with anything you need for your Nacra or Prindle. Please take advantage of the many services that authorized Nacra dealers can provide: ...

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