Summary of J/70
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Yacht name:……………………………………. Owner name:…………………………………….
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 2.
Page 3: Table Of Contents
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 3 table of contents introduction ....................................................................................................................................................................................................
Page 4: Introduction
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 4 introduction welcome aboard and welcome to the j/boats family of owners. Your boat is designed and engineered to be the strongest, best performing, easiest-‐to-‐use, and most comfortable sailing boat of its type. Sailing i...
Page 5: Ce Certification:
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 5 ce certification: with standard equipment, the j/70 meets category c requirements for ce certification. J/70s built by ccfc for european clients carry the category c certificate. The j/70 is intended for daytime navigation o...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 6 definitions of ce design categories: a ocean: designed for extended voyages where conditions may exceed wind force 8 (beaufort scale) and significant wave heights of 4 m and above but excluding abnormal conditions, and vesse...
Page 7: Specifications
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 7 specifications model j/70 loa (lh) 6.934m (22.75') lwl (lwl) 6.240m (20.47') beam (bh) 2.249m (7.38') draft : [max loaded draft] -‐ keel down 1.45m (4.75') : [1.50m (4.92’)] rudder draft .914m (3.00’) ballast 286 kg (630 lb...
Page 8: Important Contacts
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 8 important contacts dealer: phone: street: web site: city, state, zip: e mail: design & marketing: j/boats, inc. Po box 90 newport, ri 02840 info@jboats.Com www.Jboats.Com 401-‐846-‐8410 manufacturer: c&c fiberglass compone...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 9 getting to know your j/70 hull, deck & structure the engineering and construction of the j/70 hull, deck, rudder, keel and structure meet the requirements of iso standard 12215 1-‐5 titled hull construction & scantlings for...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 10 caution: use of a yacht club single-‐point hoist or other non-‐standard crane to raise the j/70 keel may cause damage to both the keel and the hull at the keel trunk. J/70 keel lifting eye should only be used with the sta...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 11 equipped with a removable handle and a ¾” lock nut for use with a portable drill and ¾” extended length socket. The keel can be manually winched up or down in approx. 2-‐3 minutes and/or with a power drill in approx. 20-‐...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 12 of the forepeak bulkhead) and a bowsprit seal floats between the bearings to prevent water migration into cabin areas while sailing. An angled platform at the forward bulkhead pitches forward and down to the stem at the bow...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 13 mast boom & standing rigging the j/70 mast & boom are built by southern spars of carbon fiber and painted black with white limit marks. The mast, masthead crane and spreaders are also built of carbon fiber and painted black...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 14 to the foredeck mounted padeyes and running through the stanchions aft where the hi-‐load thimble is slipped into the end splice and lashed to the stern rail. The average breaking strength of d-‐12 sk78 used by marlow for...
Page 15: Rigging Your J/70
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 15 rigging your j/70 tools & supplies • phillips head screwdriver • flat head screwdriver • adjustable wrench • portable drill with ¾” dia. Long socket • needle nose pliers • knife/scissors • black rigging tape • white rigging...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 16 • tie together a suitable 20-‐30' extension line to the top of either the main halyard or spinnaker halyard. • pin all side shrouds onto the side chainplates being sure that turnbuckles are well loosened. • double check th...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 17 j/70 mainsheet & traveler 5mm dyneema strop harken 57mm t2 loop block 2151 harken 40mm t2 loop block 2148 harken 57mm carbo fiddle block 2621 harken carbo ratchet block 2135 harken cam base for 57mm - 144.3/16 5:1 mainsheet...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 18 j/70 backstay system 5mm dynex 75 backstay forged shackle soft eye splice one side harken 29mm fixed block 348 on ss eye strap 073 (p&s) harken 29mm cheek block 350 (p&s) harken micro cam cleat w/fairlead 468/424 (p&s) hark...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 19 j/70 boom vang & cunningham harken 57mm carbo t2 loop block 2151 harken 29mm double swivel block 342 boom vang strop 5mm dyneema harken 150 cam w/425 fairlead (port & stbd.) harken 40mm carbo t2 loop blocks 2148 (one on van...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 20 j/70 halyard & mast base jib halyard exit upper & lower jib halyard spliced eye junction ronstan ss hook 4:1 jib halyard purchase line harken 291 mast mounted harken 40mm t2 loop block 2148 (for jib halyard tail) jib halyar...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 21 j/70 headstay layout harken hoistable headstay swivel h465 - for 5mm wire (shown in hoisted position). Harken 207 top swivel t-bar eye custom ss 316 - southern spars - w/5mm marine eye headstay wire 5mm 1 x 19 ss with 5mm m...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 22 j/70 jib sheet layout -‐ 2:1 purchase j/70 boom layout n e a u. H s. A. R k k a h u. S. R e a. N jib clew blocks for 2:1 sheeting (sailmaker provided) harken carbo ratchet block 2135 (jib sheet turning block) harken 150 ca...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 23 j/70 deck layout.
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 24 j/70 bow sprit & furler controls 0 4 c ronstan fairleads (for jib furler control) ronstan ss lined fairleads (for jib furler control) ronstan ss lined fairlead (pole control line) pole control line (deadends on sprit) harke...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 25 j/70 bow drainage locker & access: sealed & removable access hatch sprit & furler drainage locker drain hole (starboard side) harken furler drum.
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 26 j/70 custom keel crane 6mm dyneema cable (marlow excel d12) 1/2" through bolt for cable dead end harken 2119 twist shackle attached to harken 308 wire block black anodized custom aluminum fabrication harken 310 thru-deck wi...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 27 launching & hauling your j/70 never use the keel lifting-‐eye to attempt to lift the entire vessel! The keel lifting-‐eye is specifically designed to be used only with the standard aluminum j/70 keel crane and to support ...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 28 ☐ rig the keel crane and lift keel fully up to keel stop. ☐ securely install outboard engine on the transom bracket. ☐ remove rudder pins and rudder and safely secure below. ☐ prepare trailer with side guides (if so equippe...
Page 29: Tuning The Rig
J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 29 tuning the rig your sailmaker will have specific shroud tensions recommended for different conditions. The following is a general tuning guideline that will work well for most sails and conditions. Before tuning, be sure th...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 30 this is a very helpful racing technique in big wind and wave conditions when you want both the weight on the rail and the ability to constantly adjust the jib sheet. Spinnaker handling the j/70 spinnaker can be deployed out...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 31 appendix a: best practices -‐ boat inspection j boats has compiled, with the help of several industry experts, the following “best practices” inspection, maintenance and use guide for j/boat owners. We urge each owner to r...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 32 if you have a bow-‐stop on the trailer, use shorter strap runs (running nearly vertical) over the boat rather than long diagonal straps through the bow and stern rails. This reduces the possibility of trailer flex contribu...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 33 2) headstay -‐ the top of the headstay (wire or rod) should be checked to make sure it’s not bent. The fasteners and the top of the headstay foil should also be routinely checked. 3) clevis pins -‐ more rigging and spar m...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 34 used on wire or rod rigging. For small one designs (ex…j22, j70, j24 & j80), a good hacksaw should be carried at a minimum. Other structure 1) bulkhead tabbing -‐ the primary structural bulkheads of the boat are tabbed or ...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 35 unless a surveyor gets involved with a pre-‐sale survey, and even then, not all surveyors are versed in composites. There are critical areas on every boat that need to be vigilantly looked after and routinely inspected, an...
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J/70 owner guide page © copyright 2012, j boats, inc. All rights reserved 36 appendix b: marlow running rigging specifications item qty dia (mm) material finish length (ft) main halyard 1 6 excel -‐ racing black splice on shackle/whip 71.9 main halyard shackle 1 -‐ wichard b536 -‐ -‐ mainsheet 1...