Boatworks Most Commented

In the Zincerator

by Nigel Calder, Posted November 20, 2009
Allen Judy of Whortonsville, North Carolina, asks:

"My boatyard technician tells me that there is such a thing as being “over-zinc’d” and that there is an optimum amount of zinc anode to install on any a given boat. He says this has something to do with an electrical field imbalance and that it is best is to have just enough imbalance to sacrifice the zinc that is in place.


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Luff Considerations

by Win Fowler, Posted November 15, 2009

Bob Boller of Benicia, Califonia, asks:

 

"I have three headsails for my 1980 Catalina 30 and their LPs are 85, 110 and 150. As it does on many cruising boats, the bow pulpit interferes with the lower portion of the sails, especially the smaller two. What do you think about slightly raising the tacks of the sails up the forestay? What effect will that have on the performance


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Smart Thinker

by Tim Bartlett, Posted November 15, 2009
James Brener of Lorton, Virginia, asks:

"I’d like to get a laptop computer for the boat so I can get Wifi at the dock, run electronic charts, and access web–based weather and radar when I’m underway. What specifications do you think are important when buying a laptop for use on a boat?"

Tim Bartlett replies:

In terms of headline specs you really


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Sailboat Centerboard Upgrade

by Mike Raleigh, Posted October 27, 2009
Using a popular airfoil analysis code (XFOIL, by M. Drela & H. Youngren, see http://web.mit.edu/drela/Public/xfoil/) we analyzed the performance of the stock centerboard of a San Juan 23. As this board was a thin flat plate, this performance was rather poor, consistent with the
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Sparkling Spars

by Nigel Calder, Posted October 20, 2009
Janet Hartman of Beaufort, North Carolina, asks:

"Recently I contacted the National Ocean Survey (NOS) to ask whether the authorized clearances for overhead cables shown on their charts include the extra distance needed to avoid arcing. I received an email from nautical.charting@noaa.gov stating 'The ‘authorized clearance’ for an overhead power cable does not include the


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