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NEILPRYDE RX1 User Manual
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This guide is intended to assist in obtaining the best possible performancefrom your new RX1 sails. In addition to the latest tips from Bjorn Dunkerbeck,designer, Nils Rosenblad and the Neil Pryde Team, the end of this sectioncontains graphic instructions showing two simple steps leading to perfecttrim for all the RX1 sail sizes from 5.8 through 10.6.BASICSIn order to get the best performance from your sail, it is essential to understandthe fundamentals of rigging and tuning. What your sail looks like sitting onthe beach is completely different from how it looks powered up and pressurizedin all three dimensions while sailing.CONTROLSDownhaulThe downhaul determines the draft placement and the amount of twist inthe leech.Correct downhaul tension puts the sail’s center of effort low and forwardie right in front of you. The leech should appear to be twisted and somewhatloose (see specific details that follow). Compared to the Z1, the RX1 showsa more evenly distributed overall tension in the leech, with a bit more loosenessbetween the battens, especially in the top sections. The degree of looseness(in static state on the beach) varies between the smaller slalom sizes andthe larger course racing sizes.Undertensioning the downhaul moves the draft up and back in the sail.This makes the sail harder to sheet in, lifting you up on your toes. An undertensioned downhaul creates a sail shape that is too full on the leading edgeproducing excessive draft and limiting top-end speed potential. It also pushesthe nose of the board down increasing friction with the water. This makesthe board slow and hard to control.DO NOT over tension your downhaul (unless you’re in survival mode)because it will twist the sail too much, take power away from your sail andmay cause excessive leech flutter.NOTE: Changing the downhaul tension effectively changes the outhaultension as well. When you adjust one you will probably need to adjust theother as well.OuthaulThe Outhaul setting determines the amount of power in your sail and theposition of the twist in the leech.The RX1 generally requires a minimum of ‘neutral’ to 1cm of positiveouthaul. At ‘neutral’ outhaul the clew reinforcement patch may look loose,but not crumpled – there will be only light tension on the outhaul line on thebeach. ‘Positive outhaul’ should be measured from this point. In very lightwinds or puffy conditions where getting onto a plane is difficult, the RX1sails may benefit from a slightly looser outhaul setting. Refer to the outhauldimension printed on the sail for the effective minimum.Correct outhaul tension properly positions the leech twist: to be open atthe top without sagging at the mid leech. A correctly outhauled sail will feelwell balanced. If you are overpowered, try more outhaul before over-downhauling.Undertensioning the outhaul causes the draft to move too far back andallows the lower leech to twist excessively. This makes the sail unbalancedand difficult to trim correctly underway.Overtensioning the outhaul makes the sail too flat aft. This depowers thesail, restricts the leech twist, and moves the balance point too far forward.If you feel too much back hand pull, add outhaul. If there is excessive fronthand loading, ease the outhaul. If the sail feels ‘dead’ or slow to plane,decrease outhaul tension.NOTE: Changing the outhaul tension effectively changes the downhaultension as well. When you adjust one you will probably need to adjust theother one too.Bigger sizes (7.6 and up) are generally used in course racing conditionsand can advantageously be used with adjustable outhaul systems, wherebyyou tune the sail while sailing. The RX1 is designed to have a variety ofouthaul settings without negatively affecting the leech characteristics. Generallyspeaking:♦ The outhaul should be ‘on’ (flattening the sail) going upwind or reaching.♦ The outhaul should be let out when going downwind, to get a ‘spinnakereffect’ making the sail more powerful.In fact, more and more riders also use these adjustable outhaul systemsalso in the slalom sails.The Three Position ClewSelect the clew position which is most comfortable for your personal sailingstyle and which best fits the relevant performance requirements as outlinedbelow.UPPER CLEW POSITION: Excellent for smooth water or underpoweredconditions. This position makes the leech firmer and trims with less rakeangle. Also used for course racing going upwind.MIDDLE POSITION: Good average settingLOWER CLEW POSITION: Good for rougher water. Makes the leechsofter even with firm outhaul. Trims with more rake angle. Increased control.Batten TensionCorrect batten tension is an important aspect of proper sail tuning. Correctbatten tension is just enough to remove all batten pocket wrinkles. Any moreis too much. Excessive batten tension forces too much draft into the sailwhich spoils the designed shape, and may hinder rotation. Extreme overtension can damage the sail. If the battens are correctly tensioned, there isno need to detension them before de-rigging or storing the sail.ON THE WATERCourse Racing TipsCourse racing requires tuning with the emphasis on more power and moreleech tension to deliver the best possible upwind and downwind performance.The trick is to reach a balance between enough power and leech tension2RX1 T R I M G U I D E – E N G LI S H |
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