Current Issue

December/January 2020 — Table of Contents

 

Professional BoatBuikder magazine cover

On the cover: Advances in solar panel efficiency and durability have allowed for significant improvements in providing onboard electrical power without a generator or a shore-power cord. Here, Nigel Calder’s well-equipped Malo 46, Nada, is fitted with four 85-watt rigid solar panels mounted on a hard bimini top. Story on page 36.
Photograph by Nigel Calder.

FEATURES

classification society rulesJohn Kecsmar

Engineering cat structures. Page 20.

20  Essentials of Catamaran Structure
by John Kecsmar
Applying classification society rules and simplified calculation techniques for robust catamaran hull connections.

Solar panelsNigel Calder

New tech of marine solar. Page 36.

36  Advances in Onboard Solar
by Nigel Calder
Refinements in solar power technology offer significant opportunities for marine applications, and some risks as well.

Vented stepsAlan Adler

Vented steps on a sailing cat. Page 54.

54  Sailing on Steps
by Alan Adler
According to the designer, his early-1990s stepped-hull catamaran idea is ripe for “theft” and further development.

A swim-stepCourtesy Pacific Fiberglass

Refit of a swim step. Page 58.

58  The Quarter-Inch Rule
by Dieter Loibner
When the owner wants an ice hold, a hot tub, a manifold hatch, and clean lines, a swim-step refit requires meticulous planning, thoughtful design, and flawless execution.

DEPARTMENTS

6  Letters, Etc.
Readers comment on ultracapacitors for engine starting; lithium-ion batteries are not simple “drop-in” replacements for lead-acid units; and the early catamarans built for The Moorings.

14  Rovings
compiled by Dan Spurr
Jim Kyle’s next Sea Sled; latest engineroom ventilation control system from Delta “T”; new designs from Doug Zurn; marine industry training at CCRI; and eight bells Fabio Buzzi, Mark Lindsay, and Lowell North.

124  Parting Shot
by Laurie McGowan
A yacht designer disparages the performance and popularity of reverse bows and respectfully suggests a practical alternative.

READER SERVICES

67  Innovative Product Showcase

71  Connections

73  Classified Advertising

75  Index to Advertisers