j122 sailboat weight

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• Sailboat Guide

J/122 is a 39 ′ 11 ″ / 12.2 m monohull sailboat designed by Rod Johnstone and built by J Boats and J Composites starting in 2008.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

J/122E (built in France) has same hull and rig with updated deck, coach roof, and interior.

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• By Steve Callahan
• Updated: May 28, 2008

Out on Chesapeake Bay last fall, the new J/122 was perfect for a crew of young bucks who were scurrying round the buoys in a stiff breeze of 18 knots, with frequent gusts into the mid-20s, half of the main going wobbly to keep their boat on its feet as they rocketed upwind and down. Already with a string of significant race firsts, it’s clear that the J/122 is a performance-oriented boat.

And even after we Boat of the Year judges climbed aboard and took over the helm and sheets, “Fast” was the first observation that judge and former racer Tom Linskey recorded in his sailing notes. But his observations and reflections soon arrived at this question: Given that the design being tested was “80 percent racer, compared with this J’s cruisier sisters, the J/42 and the J/46, is the J/122 a cruising boat?”

Unlike a true racing sled, this boat has creature comforts below that could turn the trip to and from a regatta into a pleasant voyage indeed. BOTY judge Stacey Collins, however, would’ve preferred to see more handholds on deck and steps on the mast to help her reach the halyard at the mainsail’s headboard.

As for me, I figure people have found adventure upon the deep aboard everything from ocean liners to a beach cat to a barrel. The better question, I think, is this: Whose cruising boat could this be?

I admit to admiring J boats. Generally, the heritage has provided us with a string of moderately proportioned, seakindly hulls built with high-quality modern materials and techniques. They’re nice boats to steer; good in a seaway, if a bit wet in heavy conditions; and fast on all points. J boats, after proper fitting out, have been chosen by many singlehanded sailors to cross oceans. The J/122 fits its pedigree, though its standard package is clearly oriented toward hauling the mail in light airs, racing with either a keen family or bevy of pals, and some real sport cruising. The liveaboard capability described in the brochure would more than suit me-I’ve been happy on a 21-footer for a year with no more plumbing than a bucket. Which is not to say the 122 is a stripped-down racer; in fact, the furniture and finish are on par with the other cruising boats that were sailed for Boat of the Year. But I’d keep to a minimum the gear and complicated systems that are now de rigueur aboard cruisers so the boat remains light and sails fast. To me, this is a boat for those who like long sleigh rides and a bit of adrenalin now and then.

But for those who just can’t leave the toys at home, J/Boats’ Jeff Johnstone notes that the J/122 was designed with both cruising and racing in mind, so it’s intended to carry some weight. Load it up with 10 crew when hunting for trophies, or send the rail meat packing to bring aboard a comparable amount of cruising stores.

It’s no small feat to design something as complex as a sailboat so that it appears simple, straightforward, and clean. Deceptive simplicity is a mark of J boats in general and of the J/122 in particular. Built by J/Europe in Les Sables d’Olonne, France, the J/122’s elegantly unfettered interior will work while making passages as well as living in port. Twin settees in the saloon can be augmented by swing-up pilot berths to keep resting crew amidships, the best position for minimizing motion and isolating sailors from noise from the cockpit. Twin aft double cabins also boast adequate sea berths offshore while offering privacy in port. Choose the interior on the J/122 featuring one aft cabin and you gain a head convenient to the watch and a generous garage aft, but owners with more numerous guests may prefer the additional sleeping space.

The galley features deep, near-centerline sinks, a three-burner stove and oven, decent bracing for the cook, and some of the most serious and practical fiddles on any of the boats we sailed last fall. The nav table is big enough for some actual chart work, though also ready for all the modern gizmos. Handrails, grabs, and access to seacocks and systems are logical and efficiently placed.

The construction is clean, too. The J/122 features a hull of balsa core and E-glass, resin-infused using the well-honed SCRIMP system to optimize strength, and very neat layup right down to details in places people don’t ordinarily look. I still most trust bonding deck and hull with laminate and mechanical fasteners, so I reserve judgment on a primary hull/deck joint relying almost exclusively on Plexus, although all the theory says it’s fine, and J/Boats believes: It provides both a five-year structural warranty to ride the 122 hard and see how it holds up as well as 10 years against osmotic blistering.

Given the conditions for our test sail, most cruisers would’ve thrown two reefs in the mainsail, but we went with the youth-bashing-about-the-cans full-main approach, flogging our way to weather and reaching off with barreling ease. The steering remained light and responsive. The rig is indicative of the current trend toward small jibs combined with large off-wind sails, this one flown from the J’s retractable sprit. As on Open 60s, the J/122’s shroud chainplates tie to the rail, extending the spreaders and lightening the already light, top-of-the-line, autoclaved Hall Spars carbon mast. With this rig, there’s no need for the complexity of big jibs and running backstays. Control is centered around the helm, where a big wheel hangs on a substantial pedestal that combines footrests, engine and hydraulic controls, and access to steering gear. The double-ended mainsheet exits from under the deck to the aft cockpit winches, handy, as is the manual bilge pump, to the helmsman (although when sailing off the wind, the mainsheet lies over the leeward winch). A high bridgedeck protects the cabin from downflooding. Cruisers will want to close off the back of the cockpit using the optional transom box, which will likely contain the life raft. Even racers might consider adding a lower lifeline across the opening. And cruisers will want to consider installing handrails forward of the mast and, definitely, some optional toerails aft.

J/Boats doesn’t incorporate features just because they’re trendy; instead, it uses what’s practical, whether traditional or new, to create a package that hones the primary function of a sailboat: It sails. Whatever else it will do once fully prepared-club racing with mates, scooting to Bermuda or even Hawai’i, or flash dancing to your favorite cruising nook-is up to you.

Steve Callahan is a frequent CW contributor and was a 2008 Boat of the Year judge.

LOA 40′ 0″ (12.19 m.) LWL 34′ 7″ (10.54 m.) Beam 11′ 11″ (3.63 m.) Draft 7′ 2″ (2.18 m.) Sail Area (100%) 865 sq. ft. (80.4 sq. m.) Ballast 5,600 lb. (2,540 kg.) Displacement 14,900 lb. (6,759 kg.) Ballast/D .38 D/L 161 SA/D 22.9 Water 42 gal. (159 l.) Fuel 35 gal. (132 l.) Mast Height 62′ 0″ (18.9 m.) Engine 40-hp. Volvo Designer Alan Johnstone Price $450,000 J/Boats Inc. (401) 846-8410 www.jboats.com

• The J/122 has now been replaced by the J/122E, an updated version of the 2000s model.

• More: 2001 - 2010 , 31 - 40 ft , J/Boats , keelboat , monohull , racer / cruiser , Sailboat Reviews , Sailboats
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J/122 Review

J-Boats’ latest offering the J/122 slots in between the hugely popular J/109 and 133, and is already shaping up to be a sales success, but how does she handle? Andi Robertson found out…

Just occasionally a boat test can seem almost superfluous. Bringing a new model into a well-proven line to plug the brand’s gap in the market is usually a passport to a degree of success.

But there is plenty to get wrong. Pitching against a dominant, successful model can be a hiding to nothing, especially in the IRC arena. The new J/122 was launched at the back end of last year and debuted in its shiny glory at Paris and the London Boat Show.

Even there the level of interest was enough to suggest J-Boats Europe have another best-seller on their hands, but the subsequent sales have had the builders in France going flat out to keep up with demand.

Fitting neatly between the eminently successful 35ft J/109, which continues to sell by the truck- load, and the 43ft J/133, the 122 is a pure bred IRC-led design which learns from the successes of the other.

Even compared with the 109 which has sold 340 worldwide and 76 in the UK and Ireland, and the 133 which has sold slightly more sedately, the 122 is already a success, in spite of the fact that it has not raced in earnest yet.

In Europe, orders are full until August or September when a second mould comes on stream. They are already turning out one boat a week from the D’Olonnes facility in France’s Vendée region, which is impressive for a 40- footer. The message is if you want one for next year’s Rolex Commodores’ Cup then you will need to be quick.

What is even more remarkable is that the US allocation has been sold into next year. Twenty boats have been sold already, and seven will race at Block Island Race Week.

Presently somewhere between nine and 11 boats are already sold in the UK and Ireland, with the third due to arrive in Britain imminently. The reality is that it will be late summer or early autumn before a really competitive boat will hit the campaign trail.

The regatta debut for the design was at Easter at Spi Ouest. A tight schedule meant both new boats were under-prepared, according to J-Boats Europe’s Didier Le Moal, but they came away with a respectable third and fourth in an IRC class of 46 boats, racing off an IRC handicap of 1.094. First was Gery Trentesaux’s special Beneteau First 44.7 racing off 1.107 and second the Holmatro team crewed Grand Soleil 44.7.

According to Le Moal the 122 was especially quick and competitive upwind but they let themselves down a bit elsewhere.

Design and development

The 122 benefits from what has been learned with the 109 and 133 as well as being a wellproportioned boat. It will sell simply because it is the 40ft IRC J-Boat, but it is also the best-looking of the three.

The 109 is effective but not especially pretty. The 122 benefits from having the aft sections more elegantly drawn out, appears to have slightly less freeboard and a fairly sympathetic deck line. Where the 133 can appear big and chunky and the 109 slightly pinched, the 122 is more of a ‘looker’ as well as a performer, but even so the styling remains resolutely conservative.

The hull shape is clearly orientated towards an all-round performance under IRC. The stem is nearly plumb, with the well rounded forefoot clear out of the water when the boat is at the dock. Equally there is a modest stern overhang at the stern which maximises the effective waterline length when the boat heels, but keeps the wetted surface low; certainly there is no big draggy back end and with plenty of sail area the 122 should move along respectably in gentle airs.

A special emphasis has been made to increase the simplicity and cleanliness of the deck and cockpit layout on the 122. This is especially evident in the cockpit. The mainsheet track is set on the sole forward of the wheel. As with the 133, the A-style mainsheet is very neatly run beneath the sidedecks, exiting to the 46.2 ST Harken winches, and runs inside the boom.

There is a removable dock box transom which will rarely be used on the water. The open stern substantially enhances the look as well, rather than J-Boats’ slightly awkwardly styled stepped transoms on some of the middle aged models.

Access to the steering quadrant is excellent, via a moulded hatch. Either side of this are good, deep footrests. There are ample side-decks aft of the wheel, indeed there is plenty of space for helm plus tactician or a less mobile guest.

At the pointed end the forestay is set back off the stemhead which allows the furling drum to be recessed tidily below deck level.

A decent ORC-legal toe rail is integral to the moulding on the foredeck. And it is always worth mentioning J-Boats’ scrimp resin infusion construction, which produces a hull of excellent integrity and finish. The resin infusion allows a high, very even level of glass content throughout the laminate which utilises a low density balsa core.

Rig and sails

The standard twin-spreader rig is white painted aluminium, although the carbon option will be taken up by most serious racers, and is spec’d on the US boat.

The maximum overlap on the headsail is 110 per cent, allowing the shroudbase to extend out to the sheerline. The roller furled jib maximises the ease of use whilst not compromising performance thanks to the large, high aspect mainsail.

Overall design displacement is just 6,800kgs with 2,540kgs ballast on the 2.2m deep draught, moderate L-configuration keel. As ever J-Boats stick to relatively conservative foils which offer a defined easy groove, producing lift and feel even at relatively slow speeds.

In effect it is easy to conclude that the Americans and Europeans know their market well and are careful to produce a performance envelope to match. They have pushed too hard with some of the mid-sized sports-cruisers in the past and they have not proven as popular.

Our sail was brief and inspiring, although in this case it was about getting the boat on the water as soon as humanly possible and gathering first impressions. Unfortunately that meant we had a borrowed gennaker which was too short in the hoist — hence the slightly ill-fitting look in the pics.

Overall there was a lot to be impressed with. We were well under race crew weight, but the 122 went upwind on rails.

In 9-11 knots of true wind it was a pleasure to steer, transmitting that satisfying urgency of big boat momentum but remaining light and positive. From what we could feel there were no obvious pregnant pauses upwind, those embarrassing moments when you have to dig deep and chase a too small jib. For ballpark figures we were making boatspeeds in the top end of sixes and into low sevens with relative ease upwind across that wind range.

Coming out of the tack the boat accelerated positively, holding her way well through irons and maintaining feel on the helm throughout. Cockpit ergonomics for the driver are excellent, and there seemed to be plenty of space for the crew to work. There are good, high backs to the cockpit seats and the ride felt dry and safe, which is essential considering this is still a dual-purpose boat.

Downwind it was difficult to get an insight into speed potential with a kite which is not designed for the boat and no instruments, but certainly in terms of feel and handling the 122 was a joy. Simply roll away the headsail and launch the kite with ease.

In the puffs there was an urgency and an underlying capacity to push it hard. The bow happily popped a few times but there was never enough breeze to trouble the 122 at all, leaving a pleasing smooth wake at a comfortable 8.1, 8.2 knots at about 110 TWA.

Rolling into a gybe, short-handed on a stirring sunny early spring day is all you need to do to remind yourself of why the J-Boats asymmetric set up is so popular. No messing about. Rather than brute strength, like good comedy it is all about timing, as we rolled with ease through a few painless gybes.

The interior is spacious and well appointed. All of the main headlinings are easily removed for maintenance issues. It would be easy to criticise the interior finish for being plain and insipid. On our test boat the choice of upholstery colour did not exactly set the world on fire, but the appeal is in the simplicity and good build quality, rather than any nod to contemporary styling.

The forward cabin has a good sized double berth with an en-suite access to the forward heads (on the two cabin owner’s layout) and has a desk/dresser with good stowage.

There is the choice of one or two aft cabins. The two cabin layout allows a second heads to starboard aft of the nav station, otherwise it is a fairly conventional layout for the two symmetrical back cabins. They retain plenty of space and ample ambient light.

Both the work stations downstairs — the galley and the nav station — are good. The nav area has an excellent chart table with deep fiddles and plenty of stowage. Behind the navigator’s head there is another locker, a good shelf on the semibulkhead which falls easily to hand for smaller, essential items. Mounting space for instruments is ample rather than generous.

So too the galley is well proportioned with a main forward-facing work surface, twin stainless sinks, and a large 150 litre ice-box/fridge. Fiddle rails are good all round.

J/122 Review: Verdict

The J/122 is already a success, answering a very obvious market demand, not least from J/109 owners ready to move up the size and performance scale. Over our short time with the boat it seemed an accomplished all-rounder which will have the capacity to deliver a prize-winning performance under IRC. It is easily and enjoyably sailed by an average race crew, but will cruise extensively in comfort.

It will be interesting to see how it fares up against, say, the new X-41 OD which is also making waves this season on the UK race scene, but the new J/122 has the hallmarks of a winner already.

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The J122e is a 40.0ft fractional sloop designed by Johnstone/Roséo and built in fiberglass by J Boats since 2014.

The J122e is a light sailboat which is a very high performer. It is stable / stiff and has a good righting capability if capsized. It is best suited as a fast cruiser. The fuel capacity is originally small. There is a short water supply range.

J122e for sale elsewhere on the web:

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2007 J Boats J/122 Technical Specs

General data about j boats j/122, engine and power specs, dimensions and wieght, detailed specifications, features and equipments, sailing features, other equipments, interior specifications, exterior features, electronical and electrical info, deck hardware, j boats j/122.

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• J Boats provided us with the latest version of its J/122 service repair manual
• Find All mechanical and electrical parts and accessories of J Boats J/122 Sail here

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• Last update: 13rd March 2020

J/122e's main features

J/122e's main dimensions, j/122e's rig and sails, j/122e's performances, j/122e's auxiliary engine, j/122e's accommodations and layout, j/122e's saloon, j/122e's fore cabin, j/122e's aft cabin.

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