Venting the Engineroom
I looked at the thermometer attached to the engine’s air inlet filter and raised an eyebrow. It read 117°F (48°C), and it hadn’t stopped climbing. Before looking at it, however, I knew this engineroom was hot—too hot, In addition to my drenched coveralls, many surfaces were simply too hot to touch, including the handrail around the engine.
A Race Between Breeze and Brawn
To win the Race to Alaska, a 750 mile “engineless race” that started on June 4, a boat should “sail well and row well, probably not extreme in either direction but it has to look after the crew so the crew doesn’t have to stop and go ashore,” predicted John Welsford.
Not everyone agreed with Welsford though. To explain: He was part of a boat designers panel at last year’s Wooden Boat Festival in Port Townsend, Washington (shown in the clip above are, from left, Jay Benford, Welsford, Michael Kasten, Halsey Herreshoff, Dudley Dix, and Sam Devlin). In the hour-long session, the audience was allowed to throw any and all questions at the designers, which led to someone asking, “What type of boat is going to have the best chance in the Race to Alaska?”
Growth Through Diversity
The enterprising and innovative forays of boatbuilders and yacht designers beyond the marine sector have been well documented through the years: Nathanael Herreshoff made steam engines; W. Starling Burgess created the Dymaxian Car and constructed early airplanes. Before closing in 1949, The Electric Launch Company, or ELCO, manufactured wood-paneled station wagon bodies and bowling pins. In the second half of the 20th century, Everett Pearson and TPI built everything from wind turbine blades to bus bodies and portable toilets.
Risks of Undersized Bonding Wire
Editor's Note: There are a lot of misunderstandings about marine bonding systems, as our technical editor Steve D'Antonio pointed out in his recent article The Mysteries of Bonding Systems on ProBoat.com. That confusion can also extend to bonding wires, according to marine surveyor Derek Rhymes, who wrote this response:
Last year I encountered a situation where a well-known and respected boatyard had added a bonding system to a 42 (12.8m) motor yacht. They used #8 wire for the system and did a nice and tidy job of it. The bonding system included a wire to the metal housing for the bow thruster.
What the yard didn’t consider is that the bonding wire was now also acting as the DC grounding wire for the bow thruster housing (not to be confused with the DC negative cable). So when the bow thruster motor developed a short, the #8 bonding wire tried to carry all of that current. That started a small fire, which extinguished itself. Fortunately, the bow thruster was used only for a few seconds, which prevented it from burning the boat up. But the #8 bonding system wire couldn’t carry enough current to blow the 250-amp fuse.
Pedrazzini at 101
from “Rovings,” Professional BoatBuilder No. 155
Compiled by Dan Spurr
In 1906, Augusto Pedrazzini, age 22, left his Lake Como home to try his luck working for the boatyards on Lake Zurich, in Switzerland. Augusto had learned his trade in Italy with master builder Giu-seppe Abbate and was a prized recruit. Eight years later, in 1914, he founded a boatyard near Zurich; today, his grandson, Claudio Pedrazzini, continues to build mahogany runabouts, continuing a century of Italian creativity imbued with Swiss stability.