4/17/2019 Sail Trim • Boat Prep - Clean Bottom, all gear works. Winches, halyards, traveler, cleats. • Rig Tune - Rig is straight side to side and forestay tension and mast bend are correct for conditions. • Boat Trim - All excess gear off, no weight in ends of boat, crew weight on the rail. • Annapolis • Advanced Boat Handling - Tacks and Gybes , Mark • Deltaville Roundings . • Hampton • Sail Trim - Correct trim for conditions 1 2 1. Like a Wing 2. Like a Barn Door 3. Combination 3 4 5 6 1 4/17/2019 7 8 9 10 11 12 2 4/17/2019 Defining Sail Shape 40% 13% Cord Draft Position of Max Draft Entry Angle Exit Angle 13 14 Twist Broadseam Luff Curve 15 16 Broadseam Luff Curve 17 18 3 4/17/2019 19 20 Mainsail Mainsail Halyard/Cunningham Trim Controls Trim Controls Outhaul Mainsheet & Vang Traveler Backstay 21 22 Golden Rule of Mainsail Trim Place Boom on Centerline and make top batten parallel with it. 23 24 4 4/17/2019 Light Air Mainsail Trim Medium Air Mainsail Trim Boom on centerline and upper batten slightly open Boom on centerline and upper batten parallel 25 26 Heavy Air Mainsail Trim Twist Controls • Sheet • Vang • Backstay Boom below centerline and leech twisted open 27 28 Light Air Mainsail Trim Wind Shear Boom on centerline and upper batten slightly open 29 30 5 4/17/2019 Heavy Air Mainsail Trim Boom below centerline and leech twisted open 31 32 Hard Halyard Tension Good Halyard Tension Draft Forward and vertical stress wrinkles on luff Draft at design point and neutral tension on luff 33 34 Soft Halyard Tension Halyard/Cunningham Outhaul Sheet Vang Backstay Traveler Draft aft and horizontal wrinkles on luff 35 36 6 4/17/2019 Genoa/Jib Halyard Trim Controls Backstay Sheet Lead & Sheet Tension 37 38 Golden Rule of Genoa Trim Use relationship between shrouds and leech. Should be roughly same distance top and bottom 39 40 1 st Gear 41 42 7 4/17/2019 43 44 45 46 Light Air Genoa Lead Rounder shape on foot and leech, more power, less twist 47 48 8 4/17/2019 Medium Air Genoa Lead Heavy Air Genoa Lead Medium Shape on foot and leech, good power and point Flat shape on foot and open leech, good DE - power and point 49 50 Outboard Leads 1 st Gear 2nd Gear 3rd Gear 4th Gear 51 52 Forestay Sag Comparison Light Air - Soft Medium Air - Medium Heavy Air - Hard 53 54 9 4/17/2019 Heavy Air Headstay Sag Medium Air Headstay Sag *Hard backstay *Medium backstay *More halyard tension *Even halyard tension Medium - flat entry, better speed and DE - Powering Flatter entry, better speed and pointing 55 56 Light Air Headstay Sag Headstay Sag Comparison *Light backstay *Hand tight + halyard tension Fuller and more powerful entry, better speed building Light Air - Soft Medium Air - Medium Heavy Air - Hard 57 58 Halyard/Cunningham Backstay Sheet Lead & Sheet Tension Slot 59 60 10.