corsair 27 trimaran

Corsair F27

Sailboat specifications.

• Last update: 1st April 2020

Corsair F27's main features

Corsair f27's main dimensions, corsair f27's rig and sails, corsair f27's performances, corsair f27's auxiliary engine, corsair f27's accommodations and layout.

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Corsair F 27 - A variable-geometry rocket!

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• Builder : CORSAIR MARINE INTL
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• Available in issue # 135

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30 years after its launch, this folding trimaran is still just as appealing, comfortable and fast...a rare boat on the secondhand market, to be snatched up without hesitation!

So, the Corsair is American? Yes, but the story of these folding trimarans started on the other side of the planet, in Australia. It was here that in 1975, the architect Ian Farrier started to think about one of his obsessions – folding trimarans. The principle is quite simple: to take advantage of a maximum beam when sailing, to favor power and thus speed...but also to have an hourglass figure, to be able to slip into a marina berth ordinarily reserved for a little monohull. Another feature: the ability to be loaded rapidly onto a road trailer, to head for a new stretch of water. The operation consists of removing two bolts and slackening the lateral rigging; in five minutes, it’s done. Sometimes, folding just one hull is sufficient... That year, the Trailertri 18 was launched: several hundred examples of this multihull were sold. Five years later, the Trany appeared, and finally the model we are interested in, the Corsair F 27. And this was something of a revolution, compared to the other multihulls on the water at that time – it was nothing like the already outdated designs of the English catamarans of that period. A glance at the hulls to begin with: the floats are particula...

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This unusual and innovative trimaran is not only fast, she can even fold up while still afloat.

You can count the number of successful builders of production fiberglass cruising multihulls on the fingers of one hand. In the U.S., Tony Smith of Mayo, Maryland, who builds the 30′ Gemini catamaran, is certainly a pioneer, having developed the ill-fated 26′ Telstar trimaran many years ago (the molds were destroyed in a fire). Condor Ltd. and the Outrigger Boat Co. have made some inroads into the market and have helped in the grudging conversion of American sailors to multihulls.

A number of European builders, most notably the British builder Prout and more recently Prestige and Ohlala from France, import to the U.S. a handful of boats each year.

None, however, has made a splash as big as Ian Farrier’s F-27 trailerable tri, first launched in 1985.

Farrier is a New Zealander who moved to Australia after college and began building small racing/cruising trimarans. His 19′ Tramp was Australia’s 1981 Boat of the Year. In 1984 he moved to California to begin work on the F-27 and to patent the folding mechanism that makes trailering possible.

When PS readers who own F-27s began writing to us about their boats, we took note. “Look at the F-27,” they said, “it’s something special.” A number of them sent in our Owner’s Questionnaire with raves about speed, construction and company service.

Construction

The F-27 is all fiberglass with a PVC foam core in the hull and deck. An NPG gelcoat is used, backed by AME 4000 (acrylic modified epoxy) resin. In areas of high stress, double bias fabrics, Kevlar, and carbon fiber are used. Vacuum bagging techniques are employed to ensure constant and uniform pressure on both sides of any laminate. Excess air and resin is bled off to achieve the desired, calculated weight. Light weight is essential to good multihull performance.

Unlike a monohull, which is built from basically two molds (hull and deck), the F-27 requires 52. Besides the main hull there are the two amas and four akas (cross beams), not to mention all the smaller moldings for the pop top, outboard well, hatches, and sinks. The F-27 possesses a definite “assembled” look rather than being a homogenous whole. As your eye surveys the numerous attachment points—hull/ deck joints, akas to amas, etc.—there seem to be numerous potential weak spots. The builder, however, claims there have been no failures, and we have not had reports of any. This is no doubt due to the use of quality high-tech materials and extremely careful engineering. After all, the F-27 represents nearly two decades of refinement on the original concept, not unlike the last generation of Volkswagen Beetles.

Of particular interest are the folding akas. A company brochure explains: “The beams are bolted down into molded recesses with two bolts each, the bolts being anchored into specially reinforced internal bulkheads. Once bolted the beams are strong enough on their own for all loadings. However, add the lower struts (part of the folding mechanism) and these become the primary structural members, actually relieving all bending stresses from the inner ends of the beams. Sailing is then quite possible without any bolts in beams at all! The beam bolts thus act as a backup system in the unlikely event of a folding strut failure. But should this occur the beams simply take over all loadings making the inboard structure completely safe. The actual folding struts are precision engineered from solid high strength aluminum, with nylon bush inserts being used at the pivot points with stainless steel pivot bolts.”

The akas can be folded underway while motoring, heading for the slip or launch ramp. Total beam with both amas folded in is 8′ 5″. Therein lies its appeal to Southern California sailors, who find slip space expensive if not unavailable. Also, it makes cruising Baja and the Sea of Cortez a practical adventure. Baja is the only really good cruising ground in that area, but too far to reach under sail for short term vacations.

The trailering feature will be less appealing to sailors elsewhere, except that the ability to store the boat in the backyard saves yard fees and makes maintenance a far easier chore.

The centerboard and rudders are foam-cored fiberglass with carbon fiber added for strengthening. Unlike most builders, Corsair publishes its lamination for all parts; indeed, the documentation and control evidenced at Corsair is rather extraordinary in the sailing industry.

Much of the hardware is made by Harken, including the mainsheet traveler, blocks and cleats. One reader wrote, “As the boat is well rigged, you will not need to replace any of the rigging such as winches, etc. Everything is both top quality and over-engineered.”

The boat we sailed was equipped with Lewmar #30 jib sheet winches, #24 self-tailing genoa and halyard winches; the linestoppers were made by Antal.

Performance

The F-27 is a fast boat. Obviously, speed was a priority of the design. The rig is tall and no attempt was made to provide standing headroom in the cabin, which would have added windage and weight. Already it has achieved some success racing, though it can’t be compared to monohulls and there are only a few other multihulls in its range (compare to the Newick-designed Somersault 26, Firefly 26, Dragonfly 25 and Stiletto 27). Unfortunately, we are unaware of any head-to-head competition between these boats.

We sailed Tony Cabot’s new F-27 from his mooring in Squantum, Massachusetts, under mainsail and working jib. The fully battened main can be reefed on the roller boom, though there wasn’t enough wind for us to see how the sail would set.

As we tacked out of Quincy Bay and into Boston Harbor, the wind was light (usually the case in test sails!). The boat moved effortlessly and heeled little (even in heavy weather, trimarans shouldn’t heel more than 12° to 15°). The helm was very well balanced, requiring just fingertip control (one reader said he had tuned the rig to add a little weather helm).

Approaching a fleet of racing monohulls at the harbor entrance, the 30- and 40-footers were making just a knot or so and appeared virtually dead in the water. We, on the other hand, slipped past at five knots in about as much wind, and we confess to feeling quite smug. With the board down, we also were able to point fairly high with the apparent wind between 35° and 40°, though of course multihulls are more comfortable and efficient cracked off, especially in a sea. With the F-27, this is due in part to its relatively flat, planing bottom.

In normal conditions, the F-27 can be expected to make seven to eight knots to windward. On a spinnaker reach in winds over 20 knots, speeds faster than 20 knots are possible. Cabot told me that he’d tried his darnedest to tip the boat over, but couldn’t do it (we assume he meant that the boat was not easily overpowered).

Though the F-27 is not as large a boat, with as much righting moment, as many sailors would prefer, it has made safe transoceanic passages, including California to Hawaii and New England to Europe. Through-bolting the pop top is one safety measure you’d want to take for such a passage.

F-27 owners are somewhat apologetic about the livability of the interior, mostly because there isn’t standing headroom except under the pop top, which covers the immediate galley area forward of the companionway. An optional screen/curtain encloses the sides for protection against mosquitos, gnats and other pests.

“The lack of interior space,” one reader wrote, “is a drawback compared to a monohull.”

The overall layout is clever but a bit cramped. The forward V-berth is suitable for but one medium-height person because the bow is too narrow for four feet. A head and sink are also located in this cabin, separated from the saloon by a partial bulkhead.

The main cabin has opposing settees with a convertible table hung on the daggerboard trunk. An optional insert unites the settees into one large berth. There is stowage outboard. The galley is aft with sink and flush mount stove top. The furniture foundations are fiberglass and are glassed to the hull. The access boards in the cabin sole are unvarnished teakfaced plywood. The single 12-volt battery is located in a starboard compartment between the settee and bulkhead, and there is a six-circuit electrical panel on the outside. Wiring is run through a molding behind the settees. The aft cabin sleeps two and has two windows in the transom, one vent and one lighting fixture. Kids will love it.

One difficulty monohull sailors have making the mental switch to multihulls is the comparative lightness or flimsiness of furnishings—no heavy teak cabinetry, no ash ceilings, in fact, not much wood at all unless it’s veneer. Rather, it is customary to find extensive use of fabrics on the overhead and hull liners, and that is the case in the F-27. The attractiveness of such an interior depends largely on choice of fabrics (color, pattern, texture), and Corsair has done a decent job of it. Fiberglass molding edges are covered with a vinyl molding, which looks rather cheap but does the job. Again, saving weight is paramount.

The F-27 is definitely not a liveaboard boat, but is highly functional for short cruises. One reader said,

“This has proven to be a very safe boat which both my wife and four-year-old son enjoy racing as well as cruising. The interior is small but is very livable for two weeks. We haven’t tried staying on the boat longer than that.”

The cockpit is small, as it should be for a boat touted as having offshore capabilities. It seats four with reasonable comfort. In good weather, crew can sit forward on the cabin trunk or on the netting between the main hull and amas. Moving about requires some care as the footing changes between the rigid structures and netting, and because all sail controls are led aft to the cockpit, there are winches, lines and linestoppers to trip on.

The nonskid is molded in and effective, though it looks hard to clean; we were not surprised to hear from readers confirming our suspicion.

Handling the tiller is easy, whether sitting athwartships or resting your back against the aft cabin bulkhead. Spray is deflected quite well by the tremendous flare in the topsides of the main hull. The lifeline stanchions give some security when seated, but are too low to do any good standing.

The rudder kicks up and lowers easily with dual control lines, as does the centerboard. Again, both can be managed from the cockpit.

The outboard motor sits in a well on the port quarter, and lifts by means of a block and tackle arrangement to clear the prop for sailing. Eliminating this source of drag under sail is a great bonus of small boats.

The F-27 is, in our opinion, an exceptional boat that offers decent accommodations and unparalleled performance for the standard price of $43,800 new. Options to consider are the toilet, solar panel, cabin table, sails, outboard (8-hp recommended), trailer, electronics and spinnaker.

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A new one design 20′ Corsair trimaran – more compact and affordable than ever before, to appeal to modern sailors and families who can now join the growing Corsair trimaran community. The Pulse 600 sailboat offers countless hours of fun, excitement and adventure in an easy-to-launch convenient package.

CORSAIR 760

More performance, comfort and safety than any other trimarans of this size, and the greatest 24′ Corsair trimaran yet. This is a beautiful new Corsair sailboat in a legendary size which offers a comfortable new cruising interior to sleep a couple and kids on a weekend getaway with a galley sink and stove. Corsair Marine has launched over 700 trimarans of this size.

CORSAIR 880

This is the legitimate heir to the trimaran revolution started by the Hall-of-Fame Corsair F-27 way back in 1986. The pinnacle of trimaran design, this all-new built from the ground up Corsair trimaran has full boat systems, an aft cabin to sleep 5 in total, enclosed heads and standing headroom.

CORSAIR 970

The “Cruze” – this 32ft trimaran combines the performance of the F-31 and comfort of the 37. While in Sport or Carbon guise, this trimaran sailboat approaches the blistering speed of the Corsair 37.

Overall Length

19'8" / 6 m, 14'9" / 4.5 m, beam folded, 8' / 2.45 m, draft (hull only), 9" / 0.22 m, draft d/b down, 3' 11" / 1.2 m, mast length, 31' 2" / 9.5 m, unladen weight, 992.2 lbs / 450 kg, 24' 3" / 7.39 m, 17' 11" / 5.46 m, 8' 2" / 2.5 m, upwind sail area, draft d/b up, 5' 3" / 1.6 m, 34' 5" / 10.5 m, 2,094 lbs / 950 kg, 28' 8" ft / 8.8 m, 22' 3" / 6.8 m, upwind sail area sq.m, 554.3 sq ft / 51.5 m2, 1' 5" / 0.45 m, 39' 4" / 12 m, 3,659 lbs / 1,660 kg.

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1991 Corsair F-27

• Description

Seller's Description

This particular F-27 has benefitted from 50 years of sailing, rigging and boat building experience of its current owner. His objective was to produce a fast single-handed cruising boat capable of extended periods off grid. A fiberglass/ foam/ epoxy hard top was constructed to provide cockpit shade and support for two 285 watt solar panels. The hard top also provides a way to collect rain water. A single half hour rain storm can provide over 12 gallons. In order to provide standing headroom in the cabin and protection from the elements while in the cockpit, a fiberglass/ foam/ epoxy dodger was built to fit around the companionway. To enable shallow water operation, a dagger-style rudder, rudder cassette and folding tiller by CCI Composites was installed, saving considerable weight and reducing drag. A Ballenger Spars second spreader kit was installed to stiffen the mast and all standing rigging was replaced with 316 SS wire and chrome bronze turnbuckles. The cap shrouds and associated adjustment tackles were replaced with Dynex Dux from Colligo Marine. A Harken Unit 0 furling system was installed on the headstay for headsail furling. A Tides Marine mast track was fitted, greatly easing mainsail raising and lowering. All mast lights and wiring were replaced. The three deck-mounted mast wiring plugs were removed and replaced with a single gland. The mast wires route below deck to a junction box for a protected, dry connection. A slab reefing system for three reef points was installed to the boom, with all reef lines leadingto the cockpit. An 8:1 outhaul system was installed in the boom. An ABYC compliant electrician installed a 12 function electrical panel and supervised all wiring Installation and electrical design. The 300 amp hour lithium battery allows for the continuous operation of an 64 quart 12 volt freezer for four days of minimal sun. Under normal operation, the solar panels charge the batteries in three hours.

Additional Details

Manufacturer Provided Description The F-27 is a unique combination of easily handled family cruiser, exciting performance racer, and take-it-anywhere trailerable trimaran. It’s light enough for easy handling yet large enough for serious offshore cruising. The wide, spacious decks and near level sailing provide safety while the shallow draft means any beach is just an excuse to pull in and play; other important features of this distinctively designed and beautifully engineered boat include comfortable accommodation and an exclusive folding system. Evolved from the original Trailertri 18 - which was designed, built, and launched in Australia in 1974 - the F-27 has been engineered without compromise. Foam sandwich construction is used throughout for its stiffness, excellent impact resistance, insulation, and floatation properties. Interior moldings further reinforce the hull and distribute point loadings in a totally integrated structure. The result is a light, robust craft with outstanding dependability. The single most important safety feature is absolute unsinkability There are 12 watertight compartments and 3600 lbs. of built in foam buoyancy. Other safety features include the ability to outrun unexpected storms. The rig is a well proven, highly efficient fractional rig, strongly stayed, and with all control lines led aft to the cockpit. A roller furling boom, plus jiffy reefing, is standard equipment for super easy and efficient sail handling. A custom maststep pivoting in line with the shrouds allows effortless single-handed raising, and only the best, top quality hardware is chosen. Speed, acceleration, and maneuverability make the F-27 a pleasure to handle. The helm is always light and responsive, while tacking is dinghy-like - it can even be done with the kick-up rudder lifted clear of the water, using sails only. Continuous 360 degree turns are possible, helm hard over, without touching the sails. As well, the deep retractable daggerboard gives excellent windward capability. Actual race results have proven it equal or superior to most 40 foot monohulls. The cabin has been carefully designed with the cruising sailor in mind. All facilities can be used while underway - the stove doesn’t even need gimbals. Quality workmanship and the finest materials provide the luxury and prestige expected of a world class boat. The main cabin features two single settee - berths, one on each side. There are large storage areas under and behind the settees. A foldaway table provides a dinette capable of seating four. There’s plenty of counter space and even a trash can in its own compartment. A pop-top gives standing headroom in the galley area and exceptional ventilation, and an optional cover can enclose and fully weatherproof for overnighting. A fold-down Bimini top (for sun protection) and a full cockpit cabin are also available to enclose and completely weatherproof the central cockpit area. The central cockpit works well in a high stability multihull, as the crew are not required to all sit out on the weather side. A long cockpit is unnecessary and you can then have a surprisingly roomy aft cabin. This has proven to be the most popular berth (big enough for a double) while it also makes a great kids’ cabin with plenty of room for toys and things. Another berth is located in the forward cabin along with a private head area and an optional vanity unit. On deck, the F-27 offers features unobtainable in yachts of similar size, with its space and lack of heel. The skipper will often be left alone, as the crew will soon find many more interesting spots. The bow nets are a favorite for watching the main hull knife through the waves, and the wingnets are ideal for sun-bathing or sleeping under the stars on warm summer nights. There’s even enough room to carry a full size dinghy. The self-draining cockpit has lockers each side - one for storage, the other for the gas tank. Additional jumbo size storage areas are in the floats, these being ideal for those bulky extra sails. With no need for a heavy keel, the F-27 is light and has excellent trailering characteristics. The low towing weight allows the discovery and exploration of many previously out-of-reach cruising grounds, and trailering also offers a significant saving in dock fees and maintenance. Rigging and launching can all be done singlehanded in less than 30 minutes. Everything is designed to get on the water faster. The shallow 14” draft avoids having to completely sink the trailer for launching, and launching is always done folded so no more space is taken at the ramp than with a conventional boat. Once afloat, stability is excellent and the F-27 can be quite safely motored in a folded condition. If desired, the F-27 is easily docked in a marina. Singlehanded folding takes only two or three minutes, and is done by manually moving an inner beam end. Little force is required as the float’s movement is mostly horizontal. The wingnets fold or tension themselves automatically, and there is no need to undo or reface these. Folding can be done in smooth water, rough water, or even while motoring. There are no restrictions of any kind. The most important feature of the Farrier folding system is the absence of hinges of any kind in the beams. The folding system has been engineered to actually strengthen the boat. Each beam is bolted down into the center hull with one bolt, the receiving bolt pad being bolted into a reinforced internal bulkhead. However, these bolts are superfluous, as all sailing strains are actually absorbed by the folding struts. Sailing is thus possible without bolts in the beams at all. The folding struts are precision engineered from solid high strength aluminum with glass reinforced nylon bush inserts insulating them from the stainless steel pivot pins. A built-in outboard well, just aft of the cockpit, puts the outboard in an easily reached position. The prop is well forward, similar to an inboard prop, helping to avoid cavatation, which is often a problem with transom mounted outboards. Once underway, the outboard can be tilted up clear of the water. An 8 hp motor is ample, giving a cruising speed of 6 to 7 knots. The Corsair Marine F-27 is now out of production, with over 450 made between 1986 and 1996.Sails

(All new, except spinnaker) North 3Di NorDac Large roach Mainsail with three reefs North 3DI NorDac Furling Working Jib w/ UV cover North Gennaker with Harken Furler Ulmer Kolius Asymmetrical Spinnaker (very good condition) with ATN Snuffer Mack Sails Mack Pack Mainsail Cover with spectra lazy jacks (new)

Rigging and Sailing gear

Aluminum non-rotating mast, with additional spreader kit installed Aluminum boom Lifting aluminum bowsprit with dyneema stays (for Gennaker and Spinnaker) Dagger rudder system All running rigging has been replaced with smaller diameter, low stretch high tech cordage, professionally spliced and finished4 Lewmar #30 Self-tailing winches3 Lewmar #30 Sheet Winches (All winches recently serviced with new pawls and bearings) All Harken cam cleats have been serviced with new ball bearings and springs. Spectra flag halyard added to starboard spreader

Aft cabin with mattress Two settees in main cabin Small V berth in forepeak All interior cushions have new orthopedic foam inserts. Cushions were not used until 2013. Airhead Composting Head, not installed yet 5 Hella Fans (1 in forepeak, 2 in main cabin, 2 in aft cabin)

The aft cabin hatch was reconfigured with new plexiglass and Star Board to allow for easier operation, greater air circulation and security, in addition to mainsheet storage.

A shelf was added to the aft cabin to permit more organized storage of personal gear

Electrical and Electronics

12V electrical system with circuit breaker panel and battery switch two batteries: Group 24 engine start battery, plus 300AH lithium house battery 2 x 285 watt solar panels; can charge either battery Courtesy lights in all cabins and cockpit LED lights in all cabins USB Charging Hub 2000 watt Inverter Bitstorm WiFi Booster w/ masthead antennaGarmin GPSMap 1242xsv 12” multi function display TH Intelliducer (for depth) Standard Horizon GX2200 VHF radio with AIS The GPS and VHF are mounted on a swiveling bracket that allows viewing from the cockpit or cabin. Autopilot, Raymarine ST 4000

Anchoring and safety equipment

Rocna 20lb Vulcan anchor with 25 feet 5/16” chain and 200 feet 1⁄2” 8 plait line (stored in anchor locker) 12lb Fortress-style anchor with 20 feet 1⁄4” chain, 150 feet 1⁄2” nylon rode stored in nylon bag Custom anchor bridle system with Harken fairlead Swiveling padeye added to forward cockpit face for safety harness attachment Spectra jackline system running from cockpit to bow

Miscellaneous

USCG Flare Kit Courtesy flag storage system Signal Mirror Parafoil Signaling Kite ATN Hatch Dorade for forward hatch Aluminum Boarding Ladder Rupp Marine support strut for aft mast support Seadek EPA foam covering to cockpit (grey teak pattern) JetBoil two burner propane stove Magma propane BBQ Grill Many custom fixtures in galley to store pots, pans, plates, spices and utensils Racor water separating filter added to outboard fuel system

2015 Yamaha 9.9 hp Outboard with power tilt and remote controls in cockpit Racor water separating filter added to outboard fuel system carburetor cleaned 2020 new voltage regulator

Pacific double axle trailer strictly fresh water use prior to 2017 new tires in 2014

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)

The F-28, introduced in 1998, is similar but with a number of small updates including a rotating spar. (Renamed CORSAIR 28 in 2001.)

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