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J/30 Rigging Information

Running Rigging

This is a table originally put together by a rigger in Annapolis for one of the J/30 owners. Most of the values should be close to what was on the boats when they were originally shipped. Of course, many of these dimensions will be different depending on how the controls are rigged (e.g. how your boat’s backstay control is led and how many parts you have on the block and tackle). So, don’t take these as gospel, just a useful starting point.

Halyards Length Diameter Details
Main 102 3/8″ Originally 55 ft of 3/8″ rope + 47 ft of 3/16″ wire. On Mondial, I’m using 5/16″ Technora cored line.
Jib 81 3/8″ Originally 48 ft of 3/8″ rope and 33 ft of 5/32″ wire. On Mondial, I’m using 5/16″ Technora cored line.
Spinnaker 81 3/8″ We’re using one of the blended core lines @ 5/16″ diameter
Pole Lift 54 3/8″  
Sheets      
Main 100 3/8″  
Jib 45 7/16″ One of the “fuzzy” braid lines is easier on the hands
Spinnaker 60 3/8″ or 5/16″ We’re using one of the blended core lines here to reduce stretch. It makes an amazing difference
Light air spinnaker 60 3/16″ or 5/32″  
Control Lines      
Foreguy 65 5/16″ If double-ended
Backstay 44 5/16″ We’re actually using 1/4″ line because it’s double-ended to either side of the cockpit.
Traveler 2 @ 20 5/16″ or 3/8″ Ours is a single length of line, with eyes at each end to make it easier to trip the lazy side of the traveler line
Boom Vang 26 3/8″ When we went to the Boomkicker, we kept the old soft vang, but added a doubling plate at the mast end and then used about 5′ of Spectron and a wire block to double the purchase to 12:1.
Outhaul 35 3/8″  
Cunningham 25 5/16″ or 1/4″  
Flattener 34 3/8″  
Reef Lines 34 3/8″  
Twings 2 @ 18 1/4″ We’re using Yale Light since the twings are kept in a locker except for races and don’t pick up water when they droop down.

Standing Rigging

Stay Length Diameter Details
Upper Shrouds 34′ 7 1/2″ 1/4″ T Ball to Turnbuckle
Lower Shrouds 17′ 2 3/4″ 1/4″ T Ball to Turnbuckle
Forestay 35′ 8″ 1/4″ Marine Eye to Turnbuckle – Max. Head stay length is 35’10 1/2″ measured to the Sheer Line at the bow stem fitting.(rule 5.8.2.1). The measurement listed is pin-to-pin of the stay.
Backstay – upper 37′ 10 1/4″ 3/16″ Marine Eye to Fork – The original length of the back stay was 38’2 1/4″. We shortened it 4″ to get more adjustment in it. This is a common modification to the J/30’s.
Backstay – lower 8′ 3 3/4″ 3/16″ Fork to Turnbuckle

Last update: March 1, 2000 (Copied from Old J/30 Class Website)

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