![]() ![]() All of the numbers punched in were as accurate as we could get for the light ship boat. When they arrived it became clear that if the Balance 451 could sail to the numbers that were generated, we should have contacted Elon Musk to join his rocket team. Spreadsheet guy! I e-mailed Roger Hill and asked him to work with a firm in New Zealand to do the polars. “No,” I replied, “Why do you want them?” I should never have asked. Even with the most accurate input, polar performance numbers on cruising cats are seldom achieved.Ībout a year ago a sailor e-mailed me and asked if we had polars for the new Balance 451 I had co-designed with Roger Hill. ![]() The crane operator scaled her in at 28 tons.Ģ. Recently, during a survey in Greece, we hauled out a Catana 582 with an advertised weight of 23 tons. One of our customers weighed his last year, and it came in over 33,000lb. The older Catana 471 design, for example, was said to weigh 26,000lb. I’ve never weighed a production catamaran that came in anything close to light ship weight. Sadly for them, the “light ship” weight advertised by builders is the approximate weight of the boat before they add on a single option-the tender, the spares, etc. Spreadsheet guys know they need accurate information to punch into their computers. A spreadsheet is only as accurate as the information you feed it. Here are 14 things spreadsheet guys too often forget when crunching the numbers: 1. ![]() A spreadsheet has a difficult time capturing the larger picture of what ultimately adds up to a great catamaran or the many trade-offs a designer must make when designing a yacht. ![]()
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