Islander 36 Fleet San Francisco Bay Sail Shaping for Performance Sailors Sail Trim Lecture Module #3

Sail Shaping for Performance Sailors Third Module Trim Loops Helm/Sail Feedback Spinnaker Shaping

J24 Parallel Leeches

Islander 36 Parallel Leeches

Sail Shaping for Performance Sailors Third Module Trim Loops Helm/Sail Feedback Spinnaker Shaping

Trim Loops Telltales Jib Trim – Distance From Spreaders Traveler Control Use Backstay Control Use Knot Meter Crew Feedback Two Boat Tuning Velocity Prediction Programs – VPP & Polar Diagrams Performance Prediction Programs – Target Boat Speeds

Telltales - Point Mode

I36 Polar Diagram - VPP

I36 Performance Prediction

Trim Loops – Instrument Use AWA = Apparent Wind Angle AWS = Apparent Wind Speed TWA = True Wind Angle TWS = True Wind Speed S = Boat Speed in Knots (Fun Meter!) VMG = Velocity Made Good

Sail Shaping for Performance Sailors Third Module Trim Loops Helm/Sail Feedback Spinnaker Shaping

Helm/Sail Feedback Slight Weather Helm Set-up Perfectly Balanced Helm - Fast Upwind Puff Cards - Heel and Induced Weather Helm

IAC Sail Trim - Telltales

IAC Genoa Trim & Draft Stripes

Sail Shaping for Performance Sailors Third Module Trim Loops Helm/Sail Feedback Spinnaker Shaping

Symmetrical Spinnakers Generational Designs & Specialty Designs Trim Fundamentals Special Circumstance Trim Requirements

General Spinnaker Designs

1970’s Islander 36 Radial Head Symmetrical Spinnaker

I36 Tri-Radial Symmetrical Spinnaker

Islander 36 Genniker/Cruising Spinnaker

Symmetrical Spinnaker Trim Fundamentals Hoist Trim Gybing Douse Control

One Ton Cup Hoist – “Ringing the Bell”

J24 Spinnaker Hoist

J NAs Hoisting Deeper Angle When it’s Blowing

Spinnaker Trim

Wind Tunnel Demonstrating Flow

J24 Spinnaker Leech Curves

Islander 36 Spinnaker Trim

Farr 40 Worlds SF Symmetrical Spinnaker Trim

IAC LVC Finals – Symmetrical

Islander 36 Reaching Trim

IAC Symmetrical Running

IAC Oracle BMW Leeward Takedown

Special Circumstances IAC Alinghi Spinnaker Set

J Nationals 30 Knot Squall

J Nationals 37 Knot Squall

Wing-on-Wing “The Other Option”

The “Other Option” Continued

Sail Shaping for Performance Sailors Third Module Trim Loops Helm/Sail Feedback Spinnaker Shaping

5 Key Factors for Success 1. Trim Spinnaker with Constant 3 “ to 6” Curl 2. Square the Pole Visually By Vertical Luff and Vertical Center Seam 3. Keep Windward Clew (the tack) Slightly Lower 4. Luff Breaking Too High – Pole Up, Breaking Too Low - Pole Down 5. Always Remember to Have Fun!

I36 Fleet Racing SF Bay “The Chess Game”

Sail Shaping for Performance Sailors Final Q&A Trim Loops Helm/Sail Feedback Spinnaker Shaping

Time to go Sailing!