Coming Soon – pH 850 Catamaran

Coming Soon – pH 850 Catamaran

Phillips Boatworks is thrilled to introduce the pH 850 Catamaran. Measuring 8.5 meters (28 ft) on the waterline by 5.2 meters (17 ft) wide, the pH 850 is a light and powerful recreational performer. Filling a gap between the extreme high performance grand prix and the heavier low performance production boats, the pH 850 features a unique de-mountable hard aft cockpit and just enough interior space for 38″ Twin Births, Head, and Galley. The flexibility of the design is key. It can be a winner on the race course; the venue for countless family sailing adventures; and/or even used as successful day sail charter business. With an unloaded weight of 1200 lbs, its carbon fiber pre-preg hull construction sets the pH 850 apart from all other production multi-hulls. There is nothing on the market as light, fast, fun and easily trailerable!


  • LWL – 28 feet
  • LOA – 30 feet
  • Beam Over All – 17 feet
  • Hull Beam – 39 inches
  • Waterline Ratio – 12:1
  • Mast Clearance – 48 feet
  • Draft Boards Up – 8″ Boards Down 5′
  • Mainsail Area – 302 sqft Solent 128 sqft = 430 sqft working sail area
  • Designed Lightship Weight – 1200 lbs
  • Trailer Width – 8.5′

Innovative and Simple. The pH 850 breaks down in a few hours to trailer behind any average car at 8.5′ wide. While the interior is sparse in order to reduce weight, it is useful for light cruising and camping adventure, featuring twin births in each hull with head and galley options. The ultra-lightweight carbon twill canopy covers slide forward to create standing room in the hulls between the twin birth and chart table. When shut and locked, the canopies are water tight. When paired with a mast head float, the vessel has the potential to be righted by loosening the high side stays.

Easy to sail and designed for exciting times on the water. Optional transom steps with a water level swim platform and fresh water washdown make the pH 850 very friendly for snorkeling, swimming, and diving. Rudders for recreational sailing kick-up automatically as they touch bottom still or optional high aspect racing rudders for those more competitive intent. The hard aft center cockpit features a comfortable seat height of 12 inches before any cushions are added. In the center front of the cockpit is a multipurpose control console (plinth) that consolidates most of the rigging controls for single handed sailing. All lines are fed to the 2 primary 2 speed 40:1 self tailing winches; plus an underside nacelle for floor stiffness and the outboard engine, which also help reduce bridge deck wave pounding. In front of the rotating mast is a spacious and comfortable trampoline. Nothing beats a catamaran for its trampoline net forward space (high, dry, level, and spacious): ultimate chill and relaxation; sail storage; weight savings; reduced wind and wave resistance, and more.

Hull shape that looks good and makes sense. Starting with a fast and narrow 12:1 waterline ratio this shallow 8 inch draft hull rises first to a splash chine that serves multiple purposes. In addition to looking good, it widens the interior just enough for twin births. The splash chine helps insure a dryer ride. Also a safety feature — when pressing the boat really hard, as the hull submerges, buoyancy is increased as the chine submerges. Structurally, the chine is a longitudinal hull stiffener akin to 4 I-beams running the length of the hulls. From the Splash Chine the topsides rise up to the hull/deck chines which research shows to reduce windage on the side of the hulls. Under the canopy openings and merged into the cockpit the deck features a flush raised plateau helping to make the interface between removable cockpit and hull sides a simple flat face connection.

No Beams! – For the most part the cross beams are eliminated making the trailer and decommissioning process even more simple. When collapsed on the trailer, the inner hull flanges mate together for hull stability on the trailer while the cockpit is hoisted up and out of the way, without removing any of its components or systems.

Sailing Horsepower – The combination of the best strength:weight ratio carbon hull construction, a 45 foot carbon rig and ample sail area above the water, asymmetrical curved daggerboards and high aspect cassette rudders (as an option) this is an extremely fast and competitive multihull. The curved daggerboards in each hull generate enormous upward and windward lifting force also increasing the righting moment, the pH 850 will not only go fast, but also point extremely well upwind. The wave piercing bows and wide underwater transom section, this is a hull that will ride very smoothly though even the most aggravating choppy sea conditions. When there is no wind, the aux propulsion is stowed underneath the hard cockpit inside a nacelle shape that deflects wave chop from slapping the bridge deck, as well as very effective stiffener for the cockpit sole.

pH 850 – Versatility like no other catamaran or trimaran! Sailing/Camping adventures, regatta trophy winner, intimate charter day sailor and demountable and trailerable to destinations that are begging to be explored. The pH 850 is a great investment in fun for family and friends…. or you can make it a business and find a fun spot to offer Captained Daysail Charters.

On a personal note, my family is passionate about this design because it is exactly what we like best about sailing. In addition to sailing fast, which is always more fun, from our youngest 1 year old baby girl, who is much safer in the hard aft cockpit, to our adventurous 6 and 10 year old boys who love surfing, swimming and other watersports. We frequently keep our boats on a shallow water mooring where it only takes a few minutes to hoist the mainsail, release the mooring line and be off sailing. If you like sailing more often, this is a boat that is so convenient and simple to get underway, that squeezing in some daily sailing before or after work becomes the norm. To us, this is what its all about: keeping it close to home and accessible so we can be on the water more often.

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