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Nick Turney North Sails. Sail Maker for 10 years Professional Sailor TP 52 Farr 40 RP 65 Cookson 50 Professional Coach Farr 40 TP 52 One Design.

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Presentation on theme: "Nick Turney North Sails. Sail Maker for 10 years Professional Sailor TP 52 Farr 40 RP 65 Cookson 50 Professional Coach Farr 40 TP 52 One Design."— Presentation transcript:

1 Nick Turney North Sails

2 Sail Maker for 10 years Professional Sailor TP 52 Farr 40 RP 65 Cookson 50 Professional Coach Farr 40 TP 52 One Design

3 Rig Profile Using measurements from your boat

4 We use the rig profile to design sails that best fit the rig

5 Edge Curves Horizontal and vertical curvatures Broadseaming

6 Puts a yarn or panel layout on a design surface

7 Pressure map for the sail plan

8 Applies pressure from Flow to rig and sails. Coupled with specified material properties and sail control settings, sails and rig are deformed to match sailing conditions for the specified wind speed

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10 RIG TUNESAIL CONTROLS Vertical shrouds (Uppers/ Cap) Rake, headstay sag, prebend Diagonal shrouds (lowers) Side to side bend Flatness of main sail Back Stay Headstay sag, mainsail shape Runners/ Checkstays Headstay sag, mainsail shape Big Lines Sheets Small Lines Outhaul Cunningham Vang

11 1. With your boat on land and your mast up, plumb bob the keel to make sure it is straight up and down 2. Set mast parallel to keel 3. Note that sheerline and chainplates are often inconsistent.

12 The fore and aft relation of center of effort to center of resistance creates helm, weather or lee More rake increases weather helm, less rake decreases it.

13 Static amount of bend in mast. Affected by: Shroud tension Upper Lower Spreader angle Mast butt placement Placement at deck

14 Increased Tension on uppers, gives Increased compression on mast---more prebend Increased forestay tension, to a limit.

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16 Basic Rule

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18 Oversheeting the mainsheet will close the leech, increasing weather helm and making the bow want to point up Easing the mainsheet opens the leech and decrease weather helm, making the boat easier to sail straight

19 The traveler changes power in the mainsail by changing the angle to the wind The traveler will also affect pointing ability

20 Boom on center line Adjust to keep helm Neutral Up in light air Down in heavy air

21 Draft forward is a better heavy air shape, keeping the leech more open to depower Draft aft is a better light air shape, firming the leech for power

22 Zero

23 + 25 mm

24 + 50 mm

25 + 100 mm

26 Loose outhaul makes the lower main fuller for more power Tighter outhaul flattens lower main and opens leech

27 Tight outhaul

28 20 mm looser

29 40 mm looser

30 60 mm looser

31 80 mm looser

32 Light Air – Outhaul Loose – Cunningham off – Vang Loose – Backstay, loose – Traveler up to boom on C/L. – Mainsheet- Top Batten parallel Moderate – Outhaul Max – Cunningham loose – Vang Snug, no slack – Backstay, adjust power to keep boat flat – Traveler, keep boat flat – Mainsheet top parallel or slightly open

33 Heavy Air – Outhaul Max – Cunningham, no wrinkles – Vang very firm – Backstay on hard – Traveler, down, below C/L – Mainsheet, top batten open 5- 10 degrees

34 Jib Lead – Controls Twist – Forward=more power, less twist – Back= less power, more twist Jib Halyard – Entry Position – Full Entry is better for chop – Fine Entry is better for flat water

35 Jib Sheet – Controls Over all shape and depth – Inboard and Outboard position

36 Light Air – Medium halyard- finer entry, looser in chop – Lead Forward – Eased Sheet Medium Air – Tighter Halyard in flat water, looser in chop – Lead Middle – Tighter Sheet

37 Heavy Air – Really Tight Halyard all the time – Lead Aft – Sheet eased

38 A full shape is more stable and good for power in chop or when pumping A flatter shape provides more exposed area and is most effective in flat water

39 Pole too high flattens the luff and moves the draft aft, closing the leech 2. Lowering the pole moves the draft forward and opens the leech

40 Pole Height, Inboard and Outboard Sheet Tension Discussion Pole angle Keep sheet moving

41 Too little vang allows too much twist and flattens the top of the main, depowering the sail Vang on decreases twist and makes the top of the main deeper and more powerful

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