Catamaran Design Guide

Catamaran Proportions

Spectacular sunsets in the Pacific turn the horizon into a brilliant spectrum of gold and orange colors. Copyright 2006, 2008 by Gregor Tarjan. Click here for terms of use. performance, yet desire high daily averages and passage times, which should be as short as possible. When choosing a large multihull, sailors look, above all else, for safety and comfort, long before the consideration for flat-out speed comes into the discussion. Nevertheless, performance is a highly important design...

How Are Catamaran Masts Fixed Down

Catamaran Stays Diagram

Most masts on production multihulls are fixed, non-articulating, aluminum extrusions and are therefore preferred for their reliability. above Yves Parlier's radical Hydraplaneur showing her advanced stepped hulls and biplane rig. Note how the masts are stepped on the crossbeams and not on deck this reduces compression loads and allows a lighter build. Shroud, forestay and leach tensions are counteracted by the compression of the mast on the central crossbeam, necessitating this critical zone to...

Noteworthy Multihulls

N the following chapter I have attempted to objectively present and illustrate some of the popular cruising catamarans which are available today. Purposely omitting custom boat builders, the multihulls in this section represent about 90 of today's production cats. My company, Aeroyacht Ltd., an international dealership specializing in multihulls ranging from 35'-200', has seen several new builders come and go over the past few decades the following yards seem to have passed the test of time....

What Are The Catamarain Bulkhead Spacing

Antares Pdq Catamarans

Usually the very first comments boat show visitors make when stepping aboard a large cruising catamaran is related to the vast amount of room as compared to an equivalent length monohull. Close to ideal cockpit shelters, large amounts of storage, and 360-degree saloon views are just some of the space and layout advantages of multihulls. Thanks to the wide beam of a multihull its volume is much more than meets the eye. We all know that for every additional foot in length, the interior of a...

Catamaran Sailboat Wide Bodied Hulls

Hull Resistance Curves

The cross-sectional profile of a hull will determine the wetted surface and drag. Its distribution throughout the length of the boat will affect payload carrying ability and buoyancy. From the schematics at the top of page 117, one can easily see how the wetted surface of each type of hull section differs, yet retains the same cross-sectional area. At one extreme, the deep V-type hull partitions, as employed by the Wharram catamarans, have 25 more wetted area than the contemporary type oval and...

Heavy Weather Tactics

Leopard Catamarans And Heavy Weather

Scores of books have been written about heavy weather sailing, but few of them address the particulars of multihulls and their individual considerations. Monohulls have more commonalities as a group, therefore there are more general guidelines. Storm tactics for multihulls will depend more on the capabilities of crew and vessel than any other factors. Barreling along at 18 knots in strong winds can be thrilling and is a highlight of multihull sailing. Making no seamanship errors will be as...

Catamaran vs Monohull

Catamaran Monohull Sailboat

Below An Outremer 50S tuning before the start of the famous La Route du Rhum. In order for us to appreciate the advantages of a catamaran it is important to be aware of their different attributes as compared to their ballasted counterparts. Although both types of vessels rely on watertight hulls to safely separate seawater from precious cargo on the inside, their stability is achieved via totally different means. Data of a typical 45' monohull will be compared to a 45' cruising catamaran,...

Fountaine Pajot Eleuthera

Catamaran Appendages

Starting from her introduction in the Fall of 2004, the Eleuthera 60 became Fountaine Pajot's flagship and instant success. As one of the largest one-piece infusion composite structures in the world, this catamaran not only enjoys the 30-year experience from the world's oldest multihull builder, but also a bulletproof construction, which will assure longevity and good resale value. As with all Fountaine Pajot cruising catamarans, emphasis is placed on excellent sailing performance, reliability...

Is Sailcraft Cherokee A Blue Water Catamaran

Boat Industry Senegal

Above A Pahi 31, one of the many hundreds of James Wharram-designed catamarans sailing throughout the world. want to be left behind. They invented their own ocean races, the best known being La Route du Rhum, Saint Malo to Guadeloupe. It is run every four years, alternating with the British races. Other major races are the Qu bec-to-Saint Malo race, and the La Boule-to-Dakar Race. These events attract hundreds of thousands of sailing fans at the starting and finish lines and millions of TV...