Mainsail Trim “Trim the front of the Jib and the back of the main” Trim cycle 1) Twist 2) Depth 3) Draft position 4) Helm balance

Leech Tension (1) Controlled by Mainsheet Trim mainsheet until top batten is parallel to the boom. Increased mainsheet tension moves the leech to windward. Tighter leech moves the draft aft and increases weather helm

Depth (2) Use mast bend and outhaul to control depth. Mast bend affects the upper 2/3’s of the sail and moves draft aft Outhaul affects the lower 1/3 Outhaul tension opens the slot lower down and opens the leech Loose outhaul

Draft Position (3) Controlled by the Cunningham Cunningham tension moves draft forward and opens the leech

Helm Balance (4) Trim the main position until top telltale flow most of the time Control heel and reduce helm by dropping the traveler to leeward Keep the leeward rail out of the water using the traveler first then adjust main power for wind conditions

Traveler & Main sheet interaction On a stock I-36 moving the traveler to leeward causes increased mainsheet tension

The Slot Set both main and genoa to have even slot top to bottom Reaching – twist the main to match genoa twist

Downwind When running the main is stalled Maximize projected sail area Keep leech from falling off by reducing twist Heel the boat to windward if you can

Questions