Sunreef catamarans

70 Sunreef Power Cat Hull Mods Double Efficiency

Laurent Bourgnon family on Sunreef Yachts 70 Power JAMBO - Photo Courtesy of Sunreef Yachts

Laurent Bourgnon family on Sunreef Yachts 70 Power JAMBO - Photo Courtesy of Sunreef Yachts

Sunreef Yachts said last week that modifications it has made to the 70 Sunreef Power catamaran JAMBO have nearly doubled the yacht’s fuel efficiency.  The fuel consumption on JAMBO dropped from 13 liters/hour/engine at 10 knots at 2,300 rpm, to 7.5 liters/hour/engine at 10 knots at only 1,500 rpm.

The mods are a demonstration of one of the fundamental principles of the hydrodynamic laws that affect boat hulls.  Basically, Sunreef lengthened the hulls’ overall length, in part by added bulbous bows to each hull.  Swim platform extensions also added waterline length. Stated simplistically, the principle is that longer (waterline length) hulls can go faster than shorter hulls. 

View of bulbous bow on 70 Sunreef Power Cat JAMBO - Photo Courtesy of Sunreef Yachts

View of bulbous bow on 70 Sunreef Power Cat JAMBO - Photo Courtesy of Sunreef Yachts

In the case of JAMBO, additional efficiency is derived from the bulbous bow design, which “cancels” part of the normal bow wave by creating another bow wave exactly opposite in phase to that normal bow wave.  Bulbous bows have been used on commercial vessels, warships and many larger yachts for many years, but the decision to use them on mid-size yachts is complicated by such factors as expense and more complicated hull fabrication.

In any event, the improvements demonstrated on the Sunreef power cat are significant and obviously worth the effort for JAMBO’s owners.  You can read more about the Sunreef pwer catamarans in our earlier coverage here.

Copyright © 2011 by OceanLines LLC.  All rights reserved.

Posted by Tom in Boats, Cruising Under Power, Powerboats

Sunreef Yachts Will Have 70 Sunreef Power Cat at Miami

Sunreef Yachts 70 Sunreef Power Catamaran SEA BASS -- Photo Courtesy of Sunreef Yachts

Sunreef Yachts 70 Sunreef Power Catamaran SEA BASS -- Photo Courtesy of Sunreef Yachts

 Sunreef Yachts said this week it will have the 70 Sunreef Power catamaran SEA BASS at the upcoming Miami Yacht and Brokerage Show next month.  This will mark the yacht’s American premiere.  It was launched last May and made its public debut at the Cannes Boat Show. SEA BASS is currently operating a charter yacht in the Caribbean and will be available for charter in the Bahamas following the show, via Sunreef Yachts Charter.

Aft Cockpit of the Sunreef Yachts 70 Sunreef Power Catamaran SEA BASS -- Photo Courtesy of Sunreef Yachts

Aft Cockpit of the Sunreef Yachts 70 Sunreef Power Catamaran SEA BASS -- Photo Courtesy of Sunreef Yachts

The first boat in the 70 Sunreef Power series is the yacht JAMBO, which was built in an Expedition version (note the wave-piercing bows in photo below) for Laurent Bourgnon, the famous Swiss-born sailor and adventurer.  Bourgnon is currently in French Polynesia with his family on a five-year, round-the-world tour aboard JAMBO. He has outfitted the yacht with a high-efficiency drivetrain as well as wind generators and solar panels and calculates his range under power, at 8 knots, as 20,000 miles.

Port Bow Profile of the Sunreef Yachts 70 Sunreef Power Catamaran JAMBO -- Photo Courtesy of Sunreef Yachts

Port Bow Profile of the Sunreef Yachts 70 Sunreef Power Catamaran JAMBO -- Photo Courtesy of Sunreef Yachts

Sunreef Yachts builds an extensive line of luxury sailing and power catamarans. We wrote extensively about the company and its various yachts here on OceanLines.  We also have a nice photo gallery of some of Sunreef’s yachts here.

Copyright © 2010 by OceanLines LLC

Posted by Tom in Boats, Cruising Under Power, megayachts, Passagemaking News, People, Powerboats

Sunreef Catamarans Take Serious Luxury To Sea

Sunreef 62' Classic design exterior

Sunreef 62' Classic design exterior

Built at one of the most famous shipyards in the world, Sunreef Yachts’ power and sailing catamarans are luxurious, yet tough ocean-going boats designed and built to the highest standards and with some of the latest technology available.  The famous Gdansk shipyards in Poland — former home of Lech Walessa and his revolutionary union mates — now produce Sunreef catamarans in hulls from 60 to more than 150 feet in length.  The boats are built in both aluminum and high-tech composites in a facility that keeps nearly all the skilled craftsmanship in-house.

History

Sunreef is a young company, started in 2000 by entrepreneur Francis Lapp.  Since then, more than 40 vessels have been delivered and are in service around the world as liveaboards, vacation yachts and charter boats.  In fact, many of the yachts have three different standard configurations — owner, semi-owner, and charter — acknowledging the specific design requirements of each type of usage. 

The company has benefitted from the availability of experienced shipbuilders and craftsmen in the local economy and recently acquired an additional large tract of land on the nearby Vistula River which will feature a 25,000 square meter production facility capable of building yachts longer than 50 meters.  Naval architecture, engineering and interior design are all handled internally.

Sunreef 114 - turning of the hull successfully completed

Sunreef 114 - turning of the hull successfully completed

Models

Sunreef began building sailing catamarans and has recently expanded into the power cat arena as well.  The Sunreef 62 Sailing has been the most popular model to date, although the company has several much larger yachts in construction and has delivered several larger models.  A 114′ aluminum sailing cat is currently under final construction in the yard.  Here’s a brief rundown on the models currently available from Sunreef:

Sailing Catamarans – Single Deck

Sunreef 62 classic
Sunreef 62 modern
Sunreef 70
Sunreef 80
Sunreef 90
Sunreef 100
Sunreef 114
Sunreef 130

 

Sailing Catamarans – Double Deck

Sunreef 82
Sunreef 92
Sunreef 102
Sunreef 116
Sunreef 132
Sunreef 146

Power Catamarans

60 Sunreef Power
70 Sunreef Power
80 Sunreef Power

Sunreef also has designs in-hand for a custom 130-foot day catamaran suited for entertaining large groups on the water.  Sunreef will also undertake full custom design  Here’s a closer look at two of the current models, the 62 Sailing and the 70 Power.

Sunreef 62' Classic design exterior

Sunreef 62' Classic design exterior

Sunreef 62 Sailing Catamaran

Specifications:

Construction Composite or Aluminium
Length 18.9 m / 62.00 Ft
Maximum Beam 9.2 m / 30.18 Ft
Displacement 22 T / 26 T
Draft 1.52 m / 5.00 Ft
Mast Length 24.99 m / 82.00 Ft
Main Engines 2 x 110 HP
Fuel Capacity 2 x 700 l / 2 x 184.92 US gal
Fresh Water Tank 780 l / 206.05 US gal
Main Sail 117.99 m² / 1270.00 Ft²
Genoa 62.99 m² / 678.00 Ft²
Staysail 31.96 m² / 344.00 Ft²

The 62 Sailing Cat (classic model) was derived from the larger Sunreef 74 and features the same spacious central flybridge.  This centralizes the sailing controls at this upper helm station and also offers room for all the guests to enjoy an unobstructed view while sailing.  A “modern” version of this same boat offers an interior with avant-garde decor and design, while this model features a more conventional interior finish.  The 62 in a typical owner version would likely have four luxury cabins, while a boat designed for charter work would have more beds.  While exact prices will vary significantly depending on outfitting and trim, a new 2009 Sunreef 62 would likely have a list price in the neighborhood of EURO 1.33 million ($1.78 million).  These prices reflect the premium quality not only of the interiors but the epoxy resin, vacuum-infused and carbon-reinforced hulls.  All Sunreef yachts are classified CE A Ocean Category, which is the highest seaworthiness rating available.

Sunreef 70 Power Cat in Patagonia

Sunreef 70 Power Cat in Patagonia

70 Sunreef Power Catamaran

Specifications:

Construction Composite
Length 21.03 m / 69.00 Ft
Maximum Beam 9.3 m / 30.50 Ft
Displacement 33 T
Draft 1.22 m / 4.00 Ft
Fuel Capacity 2 x 4500 l / 2 x 1188.77 US gal
Fresh Water Tank 1000 l / 264.17 US gal
Naval Architecture Sunreef Yachts
Interior Design Sunreef Yachts

 

The 70 Sunreef Power, with its dramatic lines and powerful look, applies the same luxury standards of the sailing cats to the powerboat realm.  Powered by twin 870 HP diesels,  the boat will reach a speed of 30 knots.  The hull is built using a resin-infusion process, which results in a greater strength-to-weight ratio.  Sunreef announced today the launch of hull #2 in the line — an expedition version of the boat, which takes advantage of the slippery cat hull and uses smaller, 370 HP engines, will cruise at 12 knots, with an astounding 8,000 nautical miles range at 10 knots.  Even at 15 knots, the boat will exceed 3,000 nautical miles.

The first Sunreef 70 Power, JAMBO,  made its public debut In Cannes last June.  The boat spent this past winter on an Atlantic crossing and in late February and early March passed through the Strait of Magellan, making port in Puerto Mont, Chile.  With the first part of a family circumnavigation complete, the boat is now being provisioned for its trip across the Pacific, with first stops at Robinson Crusoe and Easter Islands, enroute to French Polynesia for a longer stay.

SEABASS, known as the “Exclusive” version, has two owner suites and two guest cabins, a fully equipped flybridge with second helm station and jacuzzi.  The boat also features an innovative diving platform.

In a few short years, Sunreef has built an impressive portfolio of both aluminum and high-end composite yachts.  The firm takes advantage of the relatively economical yet extremely experienced labor of the Gdansk maritime workforce and has made significant progress establishing itself as the premium builder of luxury, ocean-going catamarans.

Copyright © 2009 OceanLines LLC

Posted by Tom in Boats, Industry News