Islander 36 Fleet San Francisco Bay Sail Shaping for Performance Sailors Sail Trim Lecture Module #2

Sail Shaping for Performance Sailors Second Module Mainsail Shaping Rig Control Shifting Gears for Conditions

Mainsail Shaping Mainsail Anatomy Mainsail Shaping Tools Halyard Cunningham Outhaul Boom Vang Mainsheet Backstay Adjuster Reefing Lines Mainsail Shaping

Mainsail Anatomy

Mainsail Parts

Fore & Aft Location of Draft in Mainsails

Twist in the Main

Vintage Star Main with Twist

J24 Worlds – Main Trim

Islander 36 Main Trim - Telltales

Farr 40 Worlds SF - Mainsail Trim

I36 San Francisco - Mainsail Trim

Farr 40 Worlds SF - Mainsail Trim

Islander 36 Mainsail Trim - Twist

IAC Mainsail Design – Our Future

Sail Shaping for Performance Sailors Second Session Mainsail Shaping Rig Control Shifting Gears for Conditions

Rig Controls Masthead Rig Backstay Adjuster Boom Vang/Preventer Roller Furlers

Islander 36 Rig

Islander 36 Rig

Swan World Cup – Masthead Rigs

Islander 36 San Juan Islands Rig Control & Headstay Sag

IAC Mast Bend/Main Trim

Angostura Regatta – Rig Loss

The Roller Furler Controversy Angostura – Odessy Roller Furler

Islander 36 with Roller Furler

UK Sails Roller Reefing Dacron Genoa

UK Sails Roller Reefing Mylar Genoa

Sail Shaping for Performance Sailors Second Module Mainsail Shaping Rig Control Shifting Gears for Conditions

Shifting Gears for Conditions Lead Positions Halyard Trim – Draft Forward Sheet Trim Boom Vang Traveler to Leeward Mast Bend Feathering versus Pinching Reefing

Shifting Gears for Conditions First Gear is Used in 0 – 6kts of Breeze Light Wrinkles in Jib Luff Draft 45 to 50% Aft for Regular or Point Mode Jib Leads – 2 Holes Forward Medium Wrinkles in Main Luff Maximum Main Draft 55% No Backstay/Mast Bend Traveler to Windward and Ease Mainsheet to Induce Maximum Leech Curve – Vertically Boom Vang - Loose Induce Heel – Crew Weight to Leeward

Islander 36 - First Gear

Islander 36 Fleet - First Gear

Shifting Gears for Conditions 2nd Gear is Used in 6 – 12kts of Breeze Light Wrinkles in Jib Luff Draft 45 to 50% Aft for Regular or Point Mode Jib Leads – Regular Position for all Telltales to Break at Once Medium Wrinkles in Main Luff Maximum Main Draft 55% Light Backstay/ Little Mast Bend Traveler Slightly to Windward and Trim Mainsheet to Reduce Vertical Leech Curve – Increase Pointing Boom Vang Tension – Light to Firm to Restrict Boom Lift Heel – Crew Weight to Windward

Islander 36 2nd Gear

Islander 36 2nd Gear

Shifting Gears for Conditions 3rd Gear is Used in 13 – 18kts of Breeze No Wrinkles in Jib Luff Draft 45% Aft for Regular or 40% for Power Mode Jib Leads – 2 Holes Aft Position for Upper Telltales to Break First – Light Upper Leech Twist Less Wrinkles in Main Luff Cunningham and Outhaul on Hard Maximum Main Draft 50% Medium Backstay/ Moderate Mast Bend Traveler Mid-ships and Trim Mainsheet to Reduce Twist Boom Vang – Taught to Very Tight Heel – All Crew Weight to Windward

Islander 36 Racing - Third Gear

Islander 36 Cruising - Third Gear

Islander 36 – Upwind Main Twist

Shifting Gears for Conditions 4th Gear is Used in 19 – 25kts Smaller Headsail – Jib Halyard – Draft Forward (40%) Jib Leads – 3 to 4 Holes Aft = Medium Leech Twist Bladed Out Main – Draft Forward (45%) Maximum Backstay Traveler to Leeward Maximum Boom Vang – Vang Sheet if Gusty

Islander 36 4th Gear Trim

Islander 36 4th Gear Trim

Shifting Gears for Conditions 5th Gear is Used in 25kts and Up Reef Balance Heel Draft Forward in Jib for Breakthrough Power Jib Leads Aft for Upper Leech Twist (4 to 6 Holes) = De-power Flat Main w/Big Speed Bubble & Leeward Traveler Use Vang Sheeting

Islander 36 Cruising - 5th Gear Trim

BOC Single Handed Heavy Air Trim

5 Key Factors for Success Trim/Sheet Both Sails in Unison Sync up Jib and Main Draft Positions 40/45, 45/50 and 50/55 Use Draft Stripes to Help Set Draft Positions Main Trim Upwind– Top Telltale Flying 50%, All Others Flying 100% Feather to Manage Extra Power and Heel

Sail Shaping for Performance Sailors Second Module – Q&A Mainsail Shaping Rig Types Rig Control Shifting Gears for Conditions