J105

Dimensions ft/lb m/kg
LOA 34.50 10.51
LWL 29.50 8.99
Beam 11.00 3.35
Standard Draft 6.50 1.98
Standard Ballast 3,400 1,542
Displacement 7,750 3,515
Engine 20 hp 20 hp
100% SA 577 53.60
I 40.60 12.37
ISP 42.10 12.83
J 13.50 4.12
P 41.50 12.65
E 14.60 4.45
SA/Dspl 24 24
Dspl/L 135 135
 
 

Hull & Deck Construction

  • Lloyd's approved, aircraft grade AL600 epoxy coated CK57 (6 lbs./cu.ft.) Baltek end-grained balsa laminate construction using polyester resin and biaxial glass fabrics. A vinylester resin barrier coat allows a ten-year hull warranty against blisters.
  • White gel coat hull with single (1.50" to 3.00") tapered bootstripe.
  • Large sit-in cockpit with 6.5' seats with backrests, suitable for cockpit cushions.
  • One lazarette locker and two cockpit seat lockers w/flush spring loaded latches.
  • Swimming and boarding platform sculptured into transom with integral ladder.
  • Cockpit coamings 2.5" high over sidedecks to channel water aft.
  • Molded companionway slide-in seahood w/dodger boss/instrument pod.
  • ORC size molded-in foredeck toe-rails.
  • Stainless steel handrails on cabin trunk.
  • GRP molded main structural bulkhead, bonded fore & aft on hull and deck as support for shroud chainplates with single opening to forepeak.
  • Fore & aft and transverse keel support beams vacuum bagged to hull.
  • Fabricated aluminum mast step with transverse beams fastened to main bulkhead.

Keel & Rudder

  • Faired lead & antimony fixed 6.5' draft, fin keel with bulb bolted to a deep molded stub. (5.5’ shoal draft option)
  • Balanced spade rudder constructed using "E" glass.
  • SS shaft mounted in self aligning rudder bearings.
  • Composite tiller with adjustable hiking handle.

Spars & Rigging

  • Tapered aluminum, fractional-rig mast with double airfoil spreaders, plus boom in anodized finish (powder coat white optional)
  • Nitronic 50 rod rigging with calibrated turnbuckles.
  • Custom 4.25" diameter, clear coated carbon fiber, retractable bowsprit with 1:2 under-deck Harken launching system. 
  • Integral hydraulic backstay adjuster with 9.5" throw for -6 rod backstay.
  • Rigid boomvang with integral cleating.
  • Main boom with #1 reef stopper to port and #2 reef sheave on starboard side to double as Cunningham.
  • 12:1 internal mainsail outhaul on boom.
  • Complete running rigging package

Deck Hardware

  • 46:1 two speed self tailing primary winches.
  • 35:1 two speed self tailing secondary winches on cabin trunk.
  • Double sheave deck organizers (P&S) recessed in dodger spray shield molding.
  • Two lock-in winch handles (10").
  • Two PVC winch handle holders
  • Aluminum mast collar.
  • 4 mast mounted turning blocks
  • Two double rope clutches aft on the cabin top. Port is main halyard and jib halyard.  Starboard is for cunningham/reef and spinnaker halyard.
  • Two jib sheet cars on a 3 foot 32mm clear anodized "T" track (P&S) with aft end stops.
  • Camcleat for headsail furler.
  • Side mounted rope clutch for spinnaker tack line.
  • Traveler track recessed in cockpit seat with 4:1 adjustment system.
  • 6:1 racing mainsheet system led to a center-mounted heavy duty swivel base with single ratchet and camcleat aft of traveler; and a 24:1 fine tune system cleated to a swivel base with camcleat on front side of traveler.
  • Custom double-rail stainless bow pulpit and dual corner stern rails with transom gate.
  • Low profile headsail furler mounted on stemhead with control line aft to port side of cabin trunk where tail can be used on primary winch.
  • Tapered lifeline stanchions with heavy duty deck plates.
  • Four 4-bolt mooring cleats.
  • Double foot blocks to lead spinnaker/jib sheets to the cockpit or cabin house.
  • Cams for lazy spin sheets, mounted aft of primary winches.
  • Two heavy duty "U" bolts aft for spinnaker sheet blocks.
  • 20x20 articulated foredeck hatch.
  • 10x10 vent hatch in head.
  • Opening ports in sides of cabin trunk.  
  • Light weight, cored, low-profile companionway sliding hatch and acrylic offshore dropboard with inside/outside opening hasp.
  • Cockpit operated bilge pump.
  • Three 12"x 20" polypropylene mesh line bags.
  • Custom SS chainplates, stemhead and backstay tang.
  • Main Cunningham/Reef block on reef hook for single line reefing system.

Auxiliary Power

  • Yanmar 3YM20 20 hp, 3 cylinder, diesel engine with  80 amp alternator.
  • Two-blade 15” folding prop.
  • Yanmar engine instrument panel in cockpit with acrylic cover.
  • Engine throttle control with neutral safety switch.
  • 12-gallon alloy fuel tank with baffles and inspection/clean out port.
Systems
  • One 90 amp deep-cycle battery.
  • On/Off battery switch.
  • Electrical panel w/circuit breakers.
  • LED Navigation lights.
  • All chainplates with lightning grounds.
  • Five swiveling halogen reading lights.
  • One fluorescent light in head.
  • Seahood pre-wired for instruments with 6 wire 22 gauge cable to nav station
  • Automatic bilge pump w/check valve & panel switch for manual operation
Interior
  • Off-white low-maintenance bulkheads, and lightweight bin panels with vinyl trim and teak cap moldings.
  • Teak and holly style synthetic high-wear cabin sole with epoxy sealed end grain.
  • Storage bins outboard of settee berths.
  • Nav station with flip-up lid to access charter storage, and outboard shelf and nav panel to house instruments.
  • Galley unit with polished stainless galley sink with fresh water foot pump and 5 gallon portable water tank with thru-hull drain.
  • Forward of the main bulkhead is a changing area, hanging locker and marine head with 12 gal polyethylene holding tank or "Y" valve for direct offshore discharge.
  • Holding tank overboard discharge manual pump.
  • Forward of the head area is a lightweight bulkhead with V-berth and below berth storage.
  • Choice of acrylic fabrics for main cabin settee cushions. Optional V-berth cushions, as well as cockpit cushions that double as settee backrests below.
  • Vinyl liner on cabin overhead and hull ceilings.
  • 12x18 mirror in head.
  • Rugged 54 qt. top opening, portable cooler under companionway ladder.
Options
  • Two Tone Deck.
  • 1/2" Cove Stripe with "J" Insignia.
  • Custom Wheel Package: Edson Racing Series 48" Black Aluminum Wheel with Natural Leather Grip; Ritchie 5" Binnacle Compass with Light; Custom GRP Molded Pedestal with SS Guard; Aluminum Emergency Tiller. 
  • Comfort Group Package: Dual Purpose Sunbrella 3" Cockpit/Settee-Backrest Cushions to match below cushion color combination  (4) Custom Acrylic
  • Covered AC Hose Lifeline Covers for Helmsman to Match Dodger Color; Mainsail Cover to Match Dodger with J/105 Logo.
  • Systems Group Package: Sink in Vanity Counter of Forward Head with Foot Pump -  plumbed and led to the galley sink discharge 1” Thru hull with inline check valve, Fresh Water Tank Under Starboard Berth with Deck Fill; 2-Burner stove. 
  • Additional 90 Amp Battery.
  • Shoal Bulb Keel with 5.5' Draft.
  • V-berth Cushions.
  • Ports on Aft Face of Cabin House (2). 
  • Stainless Grab Rails in Main Cabin.
  • Thurston Dodger with Side Curtains.
Notice Specifications are subject to change prior to delivery due to deletions, additions or revisions in quantities, brand or design at the sole discretion of J/Boats, Inc. Newport, RI.

 

 

J105 keywest2005 02-334

J/105 Class Association

There are currently 650 J/105s sailing in 15 fleets in America.  The J/105 Class and its builders have provided J/105s for women’s and men’s regattas for over 15 years. On the merits of its sailing characteristics, national distribution and smaller 4-6 person crew number, the J/105 was selected for the Storm Trysail Club's Big Boat Regatta held each fall as the principal one-design offshore class-- it's the biggest offshore one-design class sailed by college sailors every year and continues to be a favorite among the sailors of all ages.

If your looking for a great class to get involved in, look no further than the J/105 Class. Go to the J/105 Class website for more info.  J/105 Class Association Highlights

  • Established in 1991.
  • Two-Time Winner of US Sailing’s “One-Design Class of the Year".
  • 20 North American  Championships held since 1991.
  • Actively Maintained Class Website: www.j105.org
 

J/105 National Class Association Links:

J/105 Tuning Guide Links:

 

J105_keywest_022

Why J/105? A World Standard for Offshore One-Designs

Owners have cited these reasons buying a J/105:

It has critical mass for one-designracing in North America
  • More than 650 hulls built worldwide (more than twice the number of any other Class in the category)
  • Twenty five fleets worldwide, most of which are very active
  • Large critical mass is very important for resale values since demand remains high for good used boats
Incomparable one-designracing
  • One-design starts in NOOD regattas nationwide
  • Average of 30+ boats at the North Americans
  • Average of 20+ boats at J/105 Midwinters
Sails great and is easy to sail
  • Three sail design (main, small jib, and asym spinnaker)
  • Sprit & asym kite mean fewer crew, easier handling
  • Sprit means a balanced boat on a spinnaker reach
  • Roller furler means you're quick to go sailing
  • Fewer go-fast gadgets to tweak than other classes
Offers daysailing and weekend cruisingability
  • Large cockpit can easily accommodate eight adults
  • Wheel steering and inboard diesel are convenient
  • Four berths, enclosed head, small galley, cooler, dodger
  • Sitting headroom below keeps low cabin

Inexpensive to maintain and racecompetitively
  • Sail purchases limited to five in a two year period
  • Class rules prohibit costly changes to boat & equipment
  • Owner/driver class with limited exceptions for family & friends
  • Boat can be sailed with five or six people
  • Simple interior with little to maintain
Great heavy air boat
  • Stiff in a breeze with little weather helm
  • Planes downwind in 20 knots and is safe with kite in more than 30 knots- very, very safe!
Strong and active One-Design ClassAssociation
  • Active review and enforcement of rules
  • Strict limits on charterers at major events
  • Active web site with community forum board
  • Twice annual Newsletters
  • More than half of J/105 owners are members
Strong support from J/Boats and Builder
  • J/Boats has solid builders providing support
  • J/Boats actively supports the Class


The Bottom line?

Not much has changed in twenty years. The J/105 is still at the top of the world in terms of an offshore racing keelboat with a strong one-design class.

It is fun and easy to sail and is active in every major racing venue of North America and races in other parts of the world as well.

You can find faster, you can find cruisier, and you can find more thrills, but the J/105 is unsurpassed if you are looking for strong one-design competition either in your local area, or if you are able to travel to away regattas.

J105 keywest2005 02-334

J/105 Class News

J/70s Sweep SDYC Hot Rum Series Class!
(San Diego, CA)- Originated in 1957, the annual Sinnhoffer Hot Rum Series completed its three race schedule (Nov. 4, 18, Dec. 2) under sunny skies and light to moderate winds in San Diego, CA. With a pursuit start and an 11.9 nm random leg course for the 140 teams, the course setup again favored the big boats powering through the fleet of smaller boats that had started in much lighter winds. The J/125s had a rough go of it this year in PHRF 1 class.  In the end, they ended up separated by...
Read more...
Bromby/Murphy Three-peat Bermuda J/105  Regatta
(Hamilton, Bermuda)- The Royal Bermuda YC and the sponsor/partner Bacardi host their annual Bacardi Bermuda Keelboat Invitational every year just prior to Thanksgiving weekend.  For three days, one-design fleets of J/105s, IOD’s and Etchells 22s are treated to spectacular sailing on the Great Sound, the recent site of the America’s Cup.For the J/105 fleet, the format is designed to be fun and inclusive of J/105 sailors around the world.  The local fleet provides their boats and three crew and invite three “international” sailors (e.g. non-Bermudian) to race with them.  In the past, the...
Read more...
J/Crew’s Chillin’ in Frisco
(Sausalito, CA)- The annual San Francisco Bay One Design Winter Series kicked off last weekend thanks to Jeff Zarwell's REGATTA-PRO race management and Sausalito Yacht Club. The local San Francisco Bay fleet of J/70s, J/120s and J/105s enjoyed sunshine and mild breeze on the first race day of the weekend series that sails on the second Saturday of each month- from November thru February.  The San Francisco Bay summer wind and fog machine has turned off for the winter and unless it's a storm front, conditions on the Bay can be delightfully balmy...
Read more...

J105 keywest2005 04-336

Why J/105? A SAIL Magazine Review

"Maximum Speed-to-Cost Ratio"

It's a two person one-design sport cruiser that will keep up with a fully crewed racing boat. In the J/105 (10.5 meters LOA) designer Rod Johnstone has gone for high end power and an interior that is as simple as possible to provide the maximum speed-to-cost ratio.

The boat has low freeboard for minimal wind resistance, a low center of gravity, and the look of speed that Johnstone likes. Although the overall beam is not extreme, there is a lot of flare in the topsides, and the waterline is quite narrow. There is also very little below the waterline, so wetted surface is minimal. The keel is a bulb to enhance stability. And with a very simple and light interior, the 105's displacement is a lean and hungry 8,500 pounds. Most striking of all the J/105's features, though, is the retractable bowsprit and the big asymmetric spinnaker it sets. A crew of two can manage it, and one can gybe it.

I sailed the 105 in light conditions and found the asymmetric sail fun to set and trim. It was more docile than a conventional chute and got us up to wind speed at 90 degrees apparent-faster when we turned farther downwind.

Upwind, the boat is pure J: finger light on the helm, easily balanced, with an instant response to helm inputs. A tiller is standard; the optional Edson wheel is generously sized (48 inch diameter) and attached to a sturdy fiberglass pedestal that's great for bracing your feet.
Other standard equipment includes Navtec rod rigging, a Sailtec hydraulic backstay adjuster, a Hall Spars Quikvang, and a dodger.

The dodger covers a rather large companionway opening, the only place with standing headroom below deck. Designer Johnstone's figuring goes like this: With a sailing couple, only the woman is apt to be concerned with the interior, the average woman is 5 feet, 7 inches. Subtracting 2 inches makes for manageable headroom for her, and voila, a 5-foot, 5-inch interior. There's the logic of a very experienced performance sailor!

Of the off-white vinyl trimmed interior itself there's not much to say. There's a roomy V-berth forward and 6-foot, 5-inch settees amidships. There's also a Raritan head with holding tank, a carry-on cooler, a galley sink with a 5-gallon collapsible water tank, and room for a two-burner stove.

The total package is a very roomy daysailer or adequate weekender that will take you places faster than just about any other monohull of its size. As J/Boats go, that makes for a very favorable speed-to-cost ratio.