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Professional BoatBuilder #188 December/January 2020/21

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Professional BoatBuilder magazine

December/January 2020/2021

On the cover: The 63′6″ (19.35m) waterjet pilot boat Polaris III hangs ready for launch at Nordlund Boat (Tacoma, Washington) in August. Built in sturdy composites for hard service in the port of Long Beach (California), the new boat is an update of a 74′ (22.55m) model naval architect Tim Nolan designed 20 years ago. Story on page 32.
Photograph by Dieter Loibner.


Dieter Loibner

Varnish Maintenance Coats. Pages 16/17

Task Sheet: Varnish Maintenance Coats
by Joni Blanchard
A guide to basic varnish repair and annual maintenance coats.

Courtesy Peter van Oossanen

Physics of sail propulsion. Page 20.

20  The Deeper Science of Sailboat Design
by Michael G. Morabito
A review of Peter van Oossanen’s The Science of Sailing: A Complete Guide to the Physics of Sailing and the Naval Architecture Governing the Performance of Sailing Yachts.

Dieter Loibner

Building a GRP pilot boat. Page 32.

32  Pilot Boat Evolution
by Dieter Loibner
Launching Polaris III, naval architect Tim Nolan and Nordlund Boat concluded a pilot boat project that built on their experience from a similar endeavor more than 20 years ago.

Courtesy DLBA

Engineering aluminum frames. Page 46.

46  In the Frame: Part 1
by John Kecsmar
Basic parameters and essential considerations of frame design for aluminum boats.

Courtesy GreenBoats

Building with flax composites. Page 54.

54  The Quest for Cleaner Composites
by Hans Buitelaar
New fibers and resins promise to reduce pollution, consume less energy in production, and yield composite boats that can be recycled.



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