North Sails RESOURCES

J/109 Tuning Guide

Base Settings

  • Rake – Swing Arc – Use jib halyard pulled down to top of black band on mast – swing fwd to mark headstay.
  • Rake – Distance from mark on headstay to deck at stem: 2230 mm
  • Cap Shroud Tension: #60 on RT-10 Loos Gauge
  • D1 Tension: #40 on RT-10 Loos Gauge
  • D2 Tension: #25 on RT-10 Loos Gauge
  • J Dimension: Measured from stem to Fwd face of mast: 4050mm
  • Mast Base: Measured from Fwd face of mast to bulkhead: 460 mm
  • Pre-Bend: without mainsail hoisted: 20mm

Sail Models

Jibs

  • 0-14 TWS: LM-1 Light-Medium Jib
  • 12-25 TWS: MH-1 Medium-Heavy Jib

Spinnakers

  • 0-20 TWS: A2-3 AP Spinnaker
  • 18-25 TWS: 4A Heavy Spinnaker

Quick Adjustments

Turns from Base Settings

TRUE WIND SPEED SAIL SELECTION CAP SHROUDS D1s D2s
Light (0-10 TWS) LM-1 / 2A Minus 4 Minus 1 Minus 1.5
Medium (10-16 TWS) LM-1 / MH-1 / 2A Base (60) Base (40) BAse (25)
Heavy (16-20 TWS) MH-1 / 2A Plus 5 Plus 2 Plus 1.5

Class Experts

Jack Orr

Milford, Connecticut
Jack.Orr@northsails.com

Pete Redmond

Gosport, United Kingdom
Manufacturing – Gosport, UK
Pete.Redmond@northsails.com

Jeremy Smart

Gosport, United Kingdom
Manufacturing – Gosport, UK
Jeremy.Smart@northsails.com

Chuck Allen

Portsmouth, Rhode Island
Chuck.Allen@northsails.com