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NORTH SAILS J/35 Tuning Manual

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SOLUTIONS FOR TODAY'S SAILORS
J/35
TUNING
GUIDE
4/00
NORTH SAILS

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Summary of Contents for NORTH SAILS J/35

  • Page 1 SOLUTIONS FOR TODAY’S SAILORS J/35 TUNING GUIDE 4/00 NORTH SAILS...
  • Page 2 Regattas, the J/35 class continues to have one of the strongest showings. Race weeks at Key West and Whidbey Island are other top events for the J/35 class. Today, more than 70% of the boats still actively race –– a testimony to the enduring success of this design.

  • Page 3: Table Of Contents

    Boat Notes ..........21-23 Thanks to the J/35 “Test Team” of (l to r) Andreas Josenhans, Sharon Benton, Jody Lutz, Matthew Hirsch, Tom and Cindy Hirsch (owners of J/35 AIRBORNE ) and Jeff Heath.

  • Page 4: Sailplan And Deck Layout

    J/35 Tuning Guide SAILPLAN and DECK LAYOUT RACING PREP to CL of pin at masthead - top end of forestay Race with a SMOOTH bottom! Fair the keel to make it symmetri- cal with a perfect trailing edge. Speedo paddle wheel should be 3-4 feet ahead of the forward point of the keel at the root.

  • Page 5: Setting Up The Boat & Rig

    J/35 Tuning Guide SETTING UP THE RIG Headstay length — Headstay should be 48’11” from centerline of the pin passing through the upper mast tang to the centerline pin of the tang at the bottom of the headstay (see pho- tos at right).

  • Page 6: Going Sailing

    3DL sails are designed to optimize wind ranges, in the J/35 class with two headsails permitted, range is paramount. It‘s also critical to sail with the halyard taut to prevent mid-leech sag.

  • Page 7: Upwind Sailing - Light/Moderate Air

    This is a little too much for HIKE! The difference between sitting the highest pointing angle, but good for and hiking on a J/35 is just under optimum VMG , especially without any 1000 ft./lbs. IF you are hiking hard, other boat on the lee bow.
  • Page 8 J/35 Tuning Guide UPWIND SAILING - LIGHT/MODERATE AIR AIRBORNE is showing good fore and aft trim sailing upwind in 14 knots true wind speed in flat water. Heeling True Wind Speed =14 knots angle, crew placement and hiking are crucial for speed-building. The first...

  • Page 9: Mainsail Trim

    12 knots True 14.3% @ 52% Middle 12% @ 51% Bottom 8% @ 53.6% Perry Lewis, (l), of North Sails Midwest with Bob Alice, (r), owner of J/35 MIST APPROACH reviewing Bob‘s onboard sail log and racing notes. Keeping a photo log of your sails will provide you with a “sailmakers eye”...

  • Page 10: The Trimmers View -- Moderate Air

    Fatal Attraction’s Dacron mainsail powered up in 8 knots true. These numbers are too deep for a generic sail, but it sure works on a J/35. This sail is set-up perfectly for lighter wind. Sail trimmers are speed doctors...they can adjust boat...

  • Page 11: The Trimmers View -- Heavy Air

    J/35 Tuning Guide THE TRIMMERS VIEW - #3 JIB - HEAVY AIR Left and below are two views of a three year-old 103% #3 jib in 24 knots true. We don‘t normally choose to sail in this much breeze for a tun- ing session, but this sail is function- ing perfectly.

  • Page 12: Speed Tips For Heavy Air

    Tensioning the checkstay or runner on the J/35 produces exactly the opposite sail adjustment com- pared to a fractional rig. When you tighten the runner, the mast becomes straighter.

  • Page 13: Upwind Sail Settings

    J/35 Tuning Guide J/35 UPWIND SAIL SETTINGS TRUE WIND SPEED MAINSAIL 0-6 kts true 7-12 kts true 13-19 kts true 20+ kts true 800 to 2000 psi Backstay 2100 to 4200 psi 3100 to 4200 psi Very Soft Outhaul Eased 1.5” from Eased 1”...

  • Page 14: Spinnaker Trim - Light/Moderate Air

    J/35 Tuning Guide SPINNAKER TRIM - LIGHT/MODERATE AIR Onboard AIRBORNE flying a .6 Polyester spinnaker in 12 true (left and below). The spotter looking aft from below the boom is in the best position to see the puffs tracking toward the boat from astern. The communication from the spot- ter to the driver is critical.
  • Page 15 J/35 Tuning Guide SPINNAKER TRIM - Judging the curl... AIRBORNE in great downwind trim. There are only two people in the cockpit, and the remaining crew are seated down low facing aft. For more speed, the rig could be pulled further forward by easing the backstay 5”...

  • Page 16: Spinnaker Handling

    J/35 Tuning Guide SAIL INVENTORY Set-Up your Medium #1 8 knots True as an All Purpose Genoa 18.2% @ 45.5% Increase the range of your 3DL Middle 13.1% @ 38.7% Medium #1 to perform as an All Purpose Genoa by shifting gears to match a wide range of conditions, from 8-18 true.
  • Page 17 J/35 Tuning Guide JIBING AND DOUSING THE SPINNAKER Jibing through the gybe. It is better to effortless maneuver, it can mean big 1. Foredeck crew takes lazy guy to the take a few seconds to complete a speed gains at the leeward mark.

  • Page 18: Tips & Techniques

    There’s lots of the pole preventing a lock-out.” bulkhead on the floor improves the talent racing in the J/35 class, if you CG.” need help with speed, give any one Ken Read, North Sails Rhode Island...

  • Page 19: Sail Care & Maintenance

    J/35 Tuning Guide SAIL CARE & STORAGE In Use Cleaning chance for mildew. Wet roller furl- ing sails should be rolled up Keep sails out of sun when not in Cleaning sails annually to remove loosely to allow them to dry.

  • Page 20: Sales & Service

    J/35 Tuning Guide WORLDWIDE SALES & SERVICE At North Sails, we view each sail purchase as the beginning of a long and rewarding relationship. We base this expectation on a strong service commitment that includes preventive maintenance, sound advice, education and expert repairs.

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