![\"Comp](\"https:\/\/setsail.com\/wp-content\/uploads\/2011\/03\/comp-112-83-64.jpg\")
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As we work on a new design we frequently refer to past projects. We used to overlay paper plots of lines drawings and compare how volume was handled above and below the waterline. There are the numeric values to review of course, but in the end, when you are talking about how a given shape is going to work at sea the designer has to visualize the hull in various combinations of waves. To aid in this process we would often scale the drawings so they were the same size to make comparisons easier.<\/p>\n
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These days we do this on the computer screen, importing various historic hull shapes into the new design and doing an electronic overlay. These are sized for comparison so the effects of scale are lost.<\/p>\n
Occasionally we’ll look at unscaled hulls, so the difference in size is apparent. That is the FPB 112with the FPB 64 and 83 inside (above) and alongside (below).<\/p>\n
![\"112](\"https:\/\/setsail.com\/wp-content\/uploads\/2011\/03\/112-83-65-profile.jpg\")
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When you work on a project like this sometimes the sense of size is lost as one becomes intimate with the details. Size comps bring reality into the thought process. When you look at the FPB 64 almost lost in the 112 hull, and then ponder docking in a small harbor with a gale blowing, you are apt to make better decisions. Six Lewmar 55 powered deck winches, which originally sounded like overkill for handling dock lines, all of sudden feel just right.<\/p>\n
We thought we had the preliminary design wrapped, and then a friend perusing the the drawings did some prodding. Stay tuned.<\/p>\n","protected":false},"excerpt":{"rendered":"