Summary of 70
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Yacht name:……………………………………. Owner name:…………………………………….
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 2.
Page 3: Table Of Contents
J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 3 table of contents introduction ....................................................................................................................................................................................................
Page 4: Introduction
J/70 owner guide page © copyright 2013, 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 2013, 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 2013, 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 2013, 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: light [loaded] – keel dwn/rudder on 1.45m (4.75') : [1.50m (4.92’)] draft: light [loaded] – keel up/rudder off .555...
Page 8: Important Contacts
J/70 owner guide page © copyright 2013, 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 2013, 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 2013, 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 2013, j boats, inc. All rights reserved 11 caution should be taken to insure proper alignment of the tackle. (reference appendix c: oct 25, 2012 j/70 technical bulletin). Keel crane winch is equipped with a removable handle and a ¾” lock nut for use with a portable ...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 12 into cabin areas while sailing. An angled platform at the forward bulkhead pitches forward and down to the stem at the bow of the boat with an overboard drain on the starboard side. This allows any residual water that might...
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J/70 owner guide page © copyright 2013, 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 2013, j boats, inc. All rights reserved 14 cockpit safety lines the safety lines surrounding the j/70 cockpit (for early us built j/70s through hull #180) are built by marlow ropes and made from 5mm dyneema or otherwise known as uhmwpe. These “soft lifelines” are at...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 15 running rigging j/70 includes a refined package of running rigging developed with marlow ropes to match the requirements of the j/70. The package includes each line in labeled bags with an inventory list included in the sea...
Page 16: Rigging Your J/70
J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 16 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 2013, j boats, inc. All rights reserved 17 stepping the rig danger! Contact with overhead electrical wires could be fatal! Please use extreme caution while stepping the rig, launching and sailing! The carbon fiber mast will conduct electricity • align the mast such ...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 18 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 2013, j boats, inc. All rights reserved 19 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 2013, j boats, inc. All rights reserved 20 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 2013, j boats, inc. All rights reserved 21 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 2013, j boats, inc. All rights reserved 22 j/70 headstay layout harken hoistable headstay swivel h465 - for 5mm wire (shown in hoisted position). (ref appendix c: j/70 techincal bulletin 1-11-13 for proper alignment). Harken 207 top swivel (ref appendix c: j/70 tech...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 23 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 2013, j boats, inc. All rights reserved 24 j/70 deck layout.
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 25 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 2013, j boats, inc. All rights reserved 26 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 2013, j boats, inc. All rights reserved 27 j/70 custom keel crane 3/16" 7 x 19 galvanized wire 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 wire block...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 28 j/70 hull reference line 162 4 162 4 162 4 162 4 615 535 477 452 450 700 j/ 70 hul l s tri pe ref er en ce l in e 4-19-1 2 v ert ic al dimens ions in mm ta ke n fr om lo w er tange nt point of hull edge ra di us at e ach st...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 29 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 2013, j boats, inc. All rights reserved 30 ☐ 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 31: Tuning The Rig
J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 31 tuning the rig your sailmaker will have specific shroud tensions recommended for different conditions. The following is a very general tuning guideline that will work well for most sails and conditions. Before tuning, be su...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 32 the sheet aft to the leeward winch and this is quite handy when single-‐handing. In windy conditions, you have a third option of trimming the jib sheet across the cockpit to the windward winch (cross sheeting). This is a v...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 33 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 2013, j boats, inc. All rights reserved 34 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 2013, j boats, inc. All rights reserved 35 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 2013, j boats, inc. All rights reserved 36 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 2013, j boats, inc. All rights reserved 37 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 2013, j boats, inc. All rights reserved 38 appendix b: marlow running rigging specifications item qty dia (mm) material finish length (m) main halyard 1 6 excel -‐ racing black splice on shackle/whip 21.9 main halyard shackle 1 -‐ wichard b536 -‐ -‐ mainsheet 1 ...
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J/70 owner guide page © copyright 2013, j boats, inc. All rights reserved 39 appendix c: technical bulletins the following pages include all relevant technical bulletins for the j/70 since launch in march 2012..
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J/70 technical bulletin october 25, 2012 to: j boats dealers important service notice: j/70 keel crane line there has recently been a failure of a j/70 keel crane line. J boats, ccfc and john fox (j/70 structural engineer) are reviewing the cause and any measures that may be required to minimize the...
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3) the lifting line should run from the termination point on the peak of the crane (at the large through bolt), through the cut-out on the underside of the aluminum crane down to the harken 308 wire block then back up through the larger slot on the underside of the keel crane to the harken thru-deck...
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5) during hoisting operations, ensure the lifting line is not in contact with any part of the keel crane aluminum slots on the underside of the crane – as can happen if the crane is misaligned, or the 308 block is twisted off centerline. We expect this may have been the source of the chafe and ultim...
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P.O. Box 90 557 thames st. Newport, ri 02840 usa tel 401-‐846-‐8410 info@jboats.Com january 7, 2013 dealer bulletin #810 j/70 specification update please note the following change to the j/70 specification effective with hull #181: • the dyneema safety lines and transom gate are replaced by 5/32” ...
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J/70 technical bulletin january 15, 2013 to: j boats dealers j/70 “hoistable” furler swivels we have recently learned that several forestays supplied amongst the first (20-30) j/70’s may have “hoistable” furler swivels that were installed upside- down. This is not a problem that could cause a major ...
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J/70 technical bulletin december 13, 2012 to: j boats dealers we’d like to pass along some j/70 equipment updates and rigging tips that we’ve collected as more j/70’s have been commissioned. Chafe guards for keel crane lines as a follow-up to the technical bulletin from oct. 25 th , custom chafe gua...
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Mainsail feeder the mainsail feeder can have the tendency to catch on seams along the mainsail boltrope. The feeder can be opened up using a pair of needle-nose vise grips to provide a more forgiving entry for the sail. Though it’s not shown in the photos below (for clarity), a piece of cloth or tap...
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Loops on rudder pins we’ve seen that the stainless ring dings at the top of each rudder pin can sometimes get caught and distorted when in use. We recommend replacing the upper cotter rings with small loops of line. The line loops are also easier to pull to remove the pins. As an extra safety measur...