Sails

Rig pumper

by Win Fowler, Posted April 15, 2009

"Whenever I’m motoring with the wind about 10 degrees off the starboard bow, the mast starts pumping so badly that it shakes the whole boat. The same thing happens at anchor. The mast is deck-stepped, and I’ve beefed up the compression post under the deck to make it rock solid. I’ve also checked the mast with a plumb bob and found that the column is straight but has a slight rake aft. All the


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Boatworks

Stripped for action

by Don Casey, Posted April 15, 2009
Dave Storch, of Long Beach, California, asks:

"The former owner of my Ericson 39 installed a teak cabin sole with grooves for holly strips. The strips were never installed, and the sole was never sealed or finished. It remains unfinished, but now has a number of stains in the teak, including engine oil that escaped when the engine was removed to replace the transmission.


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Boatworks

Spot on

by Gordon West, Posted April 14, 2009
R. Staats, of Neha Bay, Washington, asks:

"Have you tested the new SPOT portable position transponder? If so, is it living up to all the hype it has received?"

Gordon West replies:

Yes, I have tested it, and so far it has worked well for me. This $150 transponder provides reliable status signaling through 48 Globalstar low-earth-orbit


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Boatworks "I am curious how the Odyssey TPPL AGM batteries are working out on Nigel Calder’s new boat. I am thinking about putting TPPL AGM’s on my boat for all the reasons Calder gives. However, I wonder about how they might affect my charging system. I have a160-amp Balmar alternator and an 80-amp Yanmar. When I’m running the genset I use a Prosine 2.0 charger. Do I have to reconfigure the chargers for
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Boatworks

Sailor-Free Sailing

by David Schmidt, Posted April 14, 2009
For millennia, sailors have proven they can cross vast oceans on boats big and small. But what if you removed the crew, added two hulls, and fitted a hard wingsail and hydrofoils? Meet the Autonomous Unmanned Surface Vessel (AUSV), developed by Harbor Wing Technologies. It carries no crew, and it gathers the majority of its energy from thin solar films on its wingsail, solar
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