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Professional BoatBuilder #197 June/July 2022

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June/July 2022 — Table of Contents

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.

 

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. 

 

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