Bertram 511 Convertible | Yachting Magazine

28 Мар 2014 | Author: | No comments yet »


Bertram 50

Bertram 511 Convertible

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I believe Oldsmobile coined the tag line that came to mind when I saw the first drawings of the new Bertram 511: She’s not your father’s Bertram. I have been a Bertram fan since I could think straight and a Bertram owner for almost 20 years, so I admit a certain bias for old favorites. However, when a boat like the 511 comes along, even an old #%@* like me takes notice. She is an excellent example of the refined and focused new Bertram.

I think much of my enthusiasm for the 511 is that she has a familiar feel. The 511 replaces the 510, which was Bertram’s first new offering following its acquisition by the Italy-based Ferretti Group in 1998. I tested the 510 back then, but the familiar feel I mention comes from the fact that the 510 and the 511 were built on a hull form created for the Bertram 50 Convertible introduced in 1987. The 50 was essentially a scaled-down version of the legendary Bertram 54 Convertible, which arguably remains one of the best sea boats afloat.

While much is made of Bertram’s pioneering efforts with the deep-V hull form, the fact is that by the 1980s Bertram engineers had realized that what most call deep (20-plus degree transom deadrise) did not make sense on a 50-foot convertible. Bertram engineers compromised and melded a deep entry with a transom deadrise of about 17 degrees. They also avoided the trend to increase chine beam forward. The result is a design geared toward performance -not a party barge.

Bertram 50

While seas during our trials were not challenging, I expect from experience that the 511 will deliver a dry, comfortable ride in rougher going. That old familiar feel passed astern as I moved the throttles forward. The 511’s electronically controlled pair of 1,360-horsepower MANs responded without fuss or smoke, delivering a maximum speed of 38.3 knots. Bertram had designed the 50’s hull for speeds in excess of 40 knots and, cranked up, the 511 tracks well, turns precisely, and displays no bad habits. She can cruise all day at more than 30 knots.

In the 1980s, Bertram engineers were crunching numbers while most production builders were developing their scantlings using empirical methods- if it breaks, add more fiberglass . It was also one of the first production builders to embrace new materials like stitched biaxial fiberglass, carbon fiber, and coring. Today, Bertram and Ferretti Group engineers work together sharing notes and methods. The 511’s hull is built with a solid bottom. Foam coring is used above the chine and in the superstructure and decks. Exposed bilge areas are gelcoated and her machinery space is faired and finished. The clean look is in keeping with current fishboat market standards.

The 511’s systems appear organized, clutter free, and are less complicated than was typical in the past. For example, instead of splitting the fuel load in tanks fore and aft and plumbing a complicated fuel management system, the 511 has a single fiberglass tank forward of the engines. Balance is achieved by positioning the generator(s) aft of the engines and locating the 185-gallon water tank under the cockpit. This arrangement leaves more space to move about the engines and the fuel tank serves as a sound buffer between the machinery space and the accommodations forward.

Like all new Bertrams, the 511’s exterior styling and interior design were crafted by Zuccon International. The Italian firm has had a close working relationship with the Ferretti Group since the 1990s. While Bertram has always pushed the styling envelope in the conservative American fishboat market, Zuccon’s designs have taken things even further. Swooping house and bridge lines, ducktail bridge reverses, and house face and hullside windows are clearly a derivative of the stylish Italian motoryacht market. These details are molded in new tooling that has raised Bertram’s standard in fit and finish.

Bertram 50
Bertram 50

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