June/July 2022 — Table of Contents
On the cover: Greenboats’ composite technician Roman Urban carefully applies the first layer of 360-g/m² woven-flax fabric to the deck mold of the Flax 27 daysailer. The weave and natural fiber in this laminate will be visible under a clear coat on the finished boat. The company developed this and other flax fabrics specifically for boatbuilding and for sale. Story on page 44.
Photograph by Dieter Loibner.
FEATURES
NIGEL CALDER Dangers of dissimilar metals. Page 22.
22 Corrosive Behavior, Part 1
by Nigel Calder
Galvanic corrosion is a constant threat on boats with metal hardware or fittings, but careful selection and installation can minimize the risks.
AVENTURA BOATS Sargassum harvester design. Page 34.
34 In the Weeds
by Peter Swanson
A builder of commercial boats in the Dominican Republic tackles a stinking seaweed nuisance with a specialized catamaran.
DIETER LOIBNER Clear-coated hull of a Flax 27. Page 44.
44 Flax Boats
by Dieter Loibner
Having blazed the trail for flax composites for a dozen years, Greenboats in Bremen, Germany, now leads a boatbuilding trend that’s gathering momentum.
ZURN YACHT DESIGN Building for a boat club. Page 64.
64 Daychaser 48: For Members Only
by Aaron Porter
A membership-based boat club works with designer Doug Zurn and Boston BoatWorks to create a dayboat to fit its specialized use profile.
DEPARTMENTS
4 Letters, Etc.
Readers and authors comment on speed-versus-power curves for electric propulsion, and the real and perceived risks of lithium-ion batteries.
10 Rovings
compiled by Dieter Loibner
Farewell to multihull pioneer James Wharram; rebuilding a classic Rybovich sportfisherman in Port Townsend; and chasing the world sailing speed record with a team of Swiss engineering students.
56 Task Sheet: Balsa Core Repairs
by Dan Newland
How to remove wet balsa from cored composite boats, replace it with new balsa, and apply a new outer-skin laminate.
76 Parting Shot
by Andre Cocquyt
A semi-retired boatbuilder and composites consultant calls for new blood in industry technical leadership and contemplates aging gracefully in the boatbuilding trade.
READER SERVICES
70 New Products and Processes
71 Connections
73 Classified Advertising
