sail trim - frenchman's bay yacht club chapman - sail trim.pdfflatten sails ( backstay, sheet...
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![Page 1: Sail Trim - Frenchman's Bay Yacht Club Chapman - Sail Trim.pdfFlatten Sails ( backstay, sheet tension, headsail car position, traveler) Twist sails open Sail to the conditions, keep](https://reader031.vdocument.in/reader031/viewer/2022022608/5b88aa0a7f8b9a46538e492d/html5/thumbnails/1.jpg)
Sail Trim
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What is he talking about….
Copyright UK Fremantle 2012
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Twist
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Air flow over sails
Wind direction
Back to true wind
direction
Think smart! – Think about air flow over all sails!
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I require more power, need to change gears!
Just like driving a car, we
need to change gears, as the
conditions change.
Copyright UK Fremantle 2012
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What Gear?
1st – Lots of Power, Good Acceleration
3rd – Low Power, High Efficiency, Good Point
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For light airs (under powered)
Deeper sails, with fuller entry (especially in chop).
More twist
Prioritise speed over height
Set boom on (or just below the centre line)
Try to heel the boat
Keep crew movement down and slow movements
All tell tales should be flowing (not hiding)
Usually less than 6 knots.
1st Gear
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Moderate wind (full power)
Keep boat flat, crew weight.
Firm the leech on the mainsail, less leech twist than 1st gear
Boom on ( or just above) centre line
Top leech tell tales, hiding half the time (with flat water)
Max Speed, with height
Flatter sail plan
Wind speed between 7 to 15 Knots.
Copyright UK Fremantle 2012
2nd Gear
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Heavy wind (over powered)
Reduce heel, crew hikes hard …
Flatten Sails ( backstay, sheet tension, headsail car position, traveler)
Twist sails open
Sail to the conditions, keep helm balanced
Helmsman sail to telltales, may pinch in puffs
Mainsail trimmer, keep constant heel angle
Wind speed + 15knots.
Copyright UK Fremantle 2012
3rd Gear
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Headsail Tell Tales
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Straight Forestay.
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Headsail with forestay Sag.
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Copyright UK Fremantle 2012
Forestay Sag and halyard tension
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Lead Position
• Controls the “mix” from the sheet.
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Set the lead position, by
the telltales
• Three sets of telltales on
the Luff
• Try to get them flying
together (approximately)
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Draft Stripes
Not only do they:
Add colour to a boring
white sail!
They do make it easier to
see the draft position and
depth of the sail.
![Page 18: Sail Trim - Frenchman's Bay Yacht Club Chapman - Sail Trim.pdfFlatten Sails ( backstay, sheet tension, headsail car position, traveler) Twist sails open Sail to the conditions, keep](https://reader031.vdocument.in/reader031/viewer/2022022608/5b88aa0a7f8b9a46538e492d/html5/thumbnails/18.jpg)
Headsail Shape Properties
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Genoa Sheeting, off the Wind
Copyright UK Fremantle 2012
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Luff Tension
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Outhaul
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Mast Bend
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Rätt skotat!
Sail trim for Speed, all telltales
streaming!
Copyright UK Fremantle 2012
Good Laminar flow = Good speed
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Perfect leech
tension
Top leech tell tales is hiding half the
time!
Correct depth and sheet tension for upwind sailing.
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More twist
required
Reading the telltales when sheeted
to hard!
Leech tell tales are hiding around the back of the
leech
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Weather Helm
• Heel
• Mast rake
• Sheet tensions
• Main traveller
• Rudder balance
Adams 10 Tape Drive carbon Mainsail
![Page 30: Sail Trim - Frenchman's Bay Yacht Club Chapman - Sail Trim.pdfFlatten Sails ( backstay, sheet tension, headsail car position, traveler) Twist sails open Sail to the conditions, keep](https://reader031.vdocument.in/reader031/viewer/2022022608/5b88aa0a7f8b9a46538e492d/html5/thumbnails/30.jpg)
Mainsail Shape Properties
![Page 31: Sail Trim - Frenchman's Bay Yacht Club Chapman - Sail Trim.pdfFlatten Sails ( backstay, sheet tension, headsail car position, traveler) Twist sails open Sail to the conditions, keep](https://reader031.vdocument.in/reader031/viewer/2022022608/5b88aa0a7f8b9a46538e492d/html5/thumbnails/31.jpg)
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Mainsail Off the Wind
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Handling is Important
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Run vs. Reach
• On a Reach Wind Flows around the sail
• On a Run Wind hits the sail
![Page 36: Sail Trim - Frenchman's Bay Yacht Club Chapman - Sail Trim.pdfFlatten Sails ( backstay, sheet tension, headsail car position, traveler) Twist sails open Sail to the conditions, keep](https://reader031.vdocument.in/reader031/viewer/2022022608/5b88aa0a7f8b9a46538e492d/html5/thumbnails/36.jpg)
Fore or Aft?
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Pole Up and Down
• Controls the draft position of the spinnaker
Keep the center seam of the spinnaker
perpendicular with the horizon
• Keep the Luff breaking even
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Pole Too High
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Pole Too Low
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Pole About Right
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