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1 Swan 45 TUNE YOUR RIG FOR OUTRIGHT SPEED Swan 45 Tuning Guide Solutions for today’s sailors 2 We hope you enjoy your Swan 45 Tuning Guide. North class Swan 45 representatives and personnel have invested a lot of time to make this guide as helpful as possible for you. Tuning and trim advice offered here have been proven over time with top results in the class. North has become the world leader in sailmaking through an ongoing commitment to making sails faster, lighter and longer lasting. We are equally committed to working as a team with our customers. As always, if you have any questions or comments we would love to hear from you. Please contact your Offshore One Design class representative. Sincerely, Ken Read President North Sails Group Contents Recommended Inventory Pg. 1 Setting Up at the Spar Mainsail Pg. 3 Target Speeds and Angles All Purpose MNi-4 Mainsail 3Di 780iM RAW 19600 Pg. 4 Jib Trim Headsails Pg. 6 Mainsail Trim Li-3 Headsail 0-10kts 3Di – 780iM RAW 14700 Mi-3 Headsail 3Di – 780iM RAW 16800 Pg. 8 Spinnaker Trim Hi-3 Headsail 3Di – 780iM RAW 22400 HWJi-2 Headsail 3D – 780i 23800 Pg. 10 Spinnaker Trim Key Points Pg. 11 Hot Tips Downwind Sails A1-3 SuperLite – SL50 A2-3 SuperKote – SK60 A3-1 SuperKote – SK130 SD S2-4 SuperKote – SK60 S4-3 SuperKote – SK90 Swan 45 Tuning Guide Solutions for today’s sailors 1 1.25m White Band Fig. 1 Fig. 2 Fig. 3 Fig. 1 Fig. 2 Setting Up at the Spar Step 5 Step 1 Using the centerline headsail halyard, Step carbon spar onto adjustable swing the halyard to the TuffLuff headstay mast step. and make a reference mark on the TuffLuff. The halyard is tensioned by hand Step 2a to the locator point on the side of the spar Adjust mast step such that the forward face in Step 4 and then swung to the headstay of the carbon spar is located 58cm behind while maintaining the same tension. the aft face of the forward cabin bulkhead. This applies to most boats (Fig. 1). Step 6 Measuring from the thwartship clevis pin Step 2b which attaches the headstay to the stem Set the spar position fully aft in the fitting adjust the headstay turnbuckle partner hole for maximum “J”. Value is until the distance from the clevis pin 5.40 meters measured from headstay CL center to the reference arc mark on the at stem shear intersect. headstay is 1.25m (Fig. 2). This is the light Step 3 air base setting. With the upper and lower shrouds not quite “hand tight” shift the hounds left NOTE: Headstay load should be 1000 psi or right such that the hounds are in for an accurate measurement of headstay. the center. Use the centerline Headsail Measure 1.30 meters down from top of halyard for the measurement to the cap this white band (Fig. 3). Swing arc to the shroud tangs. headstay and make an indelible mark. Step 4 Adjust the headstay turnbuckle until the Locate a permanent reference point on distance from the headstay pin to the the side of the spar 1.3 meters below the mark is 1.25 meters. This headstay length top edge of the gooseneck “white band” is suitable for 7 knots true if you prefer to on the side of the spar. This should be just sail with maximum rake. (Light Air Base above the partner hole. setting) Swan 45 Tuning Guide Solutions for today’s sailors 2 Setting Up at the Spar Upwind in Heavy Air (16-25 vt) (continued) • From medium air measurements... • Shorten headstay further until arc Step 7 measurement is 1.23m. With rig in the middle and diagonal • Tighten D1 by 4 x 360° shrouds loose and backstay off, jack the • Tighten Caps by 5 x 360° rig up until the jack value (psi) reads 2000. To reach light air base setting for the D1 Jack pressure should be approximately and D2 ease D1 by 4 turns and D2 by 6000#, and you should see the D1 and three turns. D2 slightly to windward with mast tip to leeward approx. 2cm. Step 8 Mark your S1 (bottom spreader) and S2 For Offshore sailing with an eye toward with reflective tape from the center of headsail reaching the sail groove. From heavy set-up. • Shorten headstay 12 turns. S1 = 93cm from center at back of spar • Ease Upper shrouds approximately and spreader. 5 turns. S2 = 70cm from center at back of spar • Add 2 turns to the lower diagonals. and spreader. • Move mast butt aft 2cm. to 60cm as per NOTE: You should expect the rig to settle after use in strong winds. Some Step 9 yachts encountered approximately The boat will now sail at higher angles of 1000 psi variation after 6 days of sailing. heel without excessive rudder pressure. Diagonals and mast tip should look the Upwind in light air (4-8 vt) same as for heavy air. • Set headstay arc measurement at = 1.25m. The maximum tension on the backstay is • Jack pressure is approximately approximately 4200 PSI. The rig should be 2000# on the upstroke. aggressively but evenly bent at that time. • D1 and D2 are very loose and visibly sagging. • You should see the rig spooned to leeward (Sag) with the tip to windward slightly when fully trimmed. • Headstay should wobble in a small seaway. • Butt 2.25cm aft of full fwd. Upwind in medium Air (9-15 vt) From light air measurements. • Shorten headstay until arc measurement is 1.24m. • Tighten D1 by 3 x 360° • Tighten Caps by 3 x 360° Jack pressure should now be approximately 4000#, and you should see the mast straight sideways. Swan 45 Tuning Guide Solutions for today’s sailors 3 Target Speeds and Angles Upwind Targets Downwind Targets Optimum Sail TWS Speed TWA AWA Sail TWS Speed TWA AWA Light Jib 4 4.8 44 20 1A 4 3.9 143 74.5 Light Jib 5 6.2 41.3 20.3 1A 6 5.2 143 83 Light Jib 6 7.0 39.3 20 1A 8 6.7 143 86 Light Jib 7 7.4 36.1 20.9 1A 10 7.1 150 108 Light Jib 8 7.6 35.3 21.7 2A / 2S 12 7.5 156 126 Medium Jib 12 7.7 35.4 23 2A / 2S 14 7.7 169 157 Medium Jib 14 7.8 35.9 24.3 2A / 2S 16 8.2 173 166 Medium Jib 16 7.8 36.7 24.3 2A / 2S 18 8.6 175 171 Heavy Jib 18 7.9 37.2 26.9 4A / 4S 20 9.1 174 169 Heavy Jib 20 7.9 37.4 27.3 4A / 4S 22 9.6 173 167 Heavy Jib 22 8.0 37.6 27.9 4A / 4S 24 10.1 172 166 HWJ 24 8.0 38 29 HWJ 26 8.0 38 29 Swan 45 Tuning Guide Solutions for today’s sailors 4 Fig. 4 Fig. 5 Fig. 6 Jib Trim Light Headsail (Fig. 4) in 8 knots true windspeed. Backstay is tensioned to 2900 lbs. Note headsail leech close to trim marks on spreaders. Medium headsail (Fig. 5) in 17 knots true windspeed. Looking good Light headsail (Fig. 6) in 8.2 knots true windspeed, well trimmed but just shy of optimum inhaul (approx. 7.5°). Windspeed Sheeting Angle 8 -14 true 6.4° (A above) 17 true 7.5° (B above) 18-21 true 8.5° (C above) 22-30 true 9.2° (D above) . Swan 45 Tuning Guide Solutions for today’s sailors 5 Fig. 7 Fig. 9 Fig. 8 Jib Trim (continued) Swan 45 heavy weather jib (Fig. 9) Heavy jib (Fig. 7) nicely trimmed in 20 For Upwind in HeavyAir, 20-29 VT. knots true windspeed • Arc should be 1.23m or 6 x 360° from light base. Note, the jib leech reference marks • Tighten D1 by 7 x 360° (from light near the middle of each spreader (see red setting). Mast should have small arrows) in relation to the leech. Leech on windward bow. the heavy jib is set-up to fly far more • Tighten caps 8 x 360°. Jack pressure open than the light or medium in order should be approximately 6500 lbs. to allow faster sailing without backwind • Cunninham/outhaul/vang should be on the mainsail. Sheeting angle is tight with main halyard to band. approximately 10°. • Traveller-is operating at lower 1/3 of its range. Sheeting angle (Fig. 8) and clew position of heavy jib is approxi. 8°. Swan 45 Tuning Guide Solutions for today’s sailors 6 Mainsail Trim • Mast bend, fore-aft and sideways. The mainsail trimmer’s job is to produce Controls draft and camber. a wide range of shapes using an array of • Batten, stiffness and tension. Moves tools. The trimmer’s toolbox includes: the draft fore and aft. • Spreader sweep (more or less) • Outhaul and sheet tension control controls where the mast bends. depth and twist. • Butt position (fore and aft.) controls • Cunningham can be key in stronger mast bend. winds. Adjusts draft throughout • Mainsheet is critical in controlling the main. shape. • Boom vang to even up the entry angle and control low bend fore and aft. • Traveller controls sheeting angle and how fast the boat builds speed. • Backstay tension determines the camber of the mainsail via mast bend. • Headstay length...shorter for less pre-bend and longer for more. Modifies low depth. Swan 45 Tuning Guide Solutions for today’s sailors 7 Mainsail Trim (continued) Swan 45 main in lightest of air (Fig.
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