Rick, that is so interesting !
"One way to increase reserve buoyancy without increasing deck height, length or waterline beam is to flare the sides. This also reduces the wetter surface compared with vertical sides. You could also just put more volume in the ends using raised foredecks and leave the middle lower. The height in the bows has much more influence on avoiding a dive than the volume in the middle:"
So the peak vertical acceleration would not change by moving the volume to the end (since volume does not change) but the pitch up moment going through each waves will increase ... would'n that make the ride bumpier ? (same as dynamic lift)
"The hull with lower reserve buoyancy has less added drag from pitching up to the point where the heave is net negative."
I want to understand but with my mother tongue being french and the load of boats terms I am a bit lost ... so need to ask more questions.
Definition of heave I found is a lift force ... then a heave of 0 mean no net force upward (boat then ride at a certain equilibrium height ?)
I could not find (look for a good 1 hour) either a graph, table or equation for "normal" wave that link wavelenght, height and windspeed together so I have an idea for your numbers in context. Would you have something on hand ?
I am getting at profiling the hulls soon ... I am still messing around with the folding geometry which does not cooperate :-)
Many thanks!
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Posted by: lucsimard@ymail.com
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