The ability to look at the lines of a boat and immediately see whether the design has merit requires a practiced eye. this is mostly a matter of understanding what the vessel's lines represent, and then of passing judgment based on what has been observed to be a good design in the past. to the. Go directly to the sail calculator here. what carl’s sail calculator does: physicist and sailor carl adler developed this online sail calculator for comparing sailboats and its database has grown over a number of years to almost 3000 boats.. Generally, the higher the value the faster the boat, provided the boat is stiff enough to handle the larger sail areas. sail area wetted surface ratio , sa/ws, dimensionless. this ratio is an indicator sail boat performance in light and medium air..
Here are some hewlett packard hp-41 calculator programs i wrote for some of the design ratios and some other boat related values. these will run on any of the hp-41 series and on the hp-42. with a little modification they will run on any of the hp rpn machines.. So, if the boat with the highest sail area to displacement has a value of 48, a boat with a sail area to displacement of 24 would receive a value of .5. for a 'low' search it is the inverse. that is, if the boat with the lowest capsize ratio has 1.3, a boat with a capsize ratio of 3.9 would receive a value of 0.33.. Basic buoyancy calculation—an old, but easy way. so, you sketched out your dreamboat, but now you want to know if it will float - and to what waterline ! if you've drawn your hull shape with boat or ship-based software, there's an excellent chance that you already have all the basic displacement information that you need..
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