[quote=catfever]Alex and Johno thanks for the replies. I have taken to cutting the bow off of one hull. I have modeled the entry after the vertical bows of the Nacra. Was thinking of inverting bows like the late Infusion, but we will see where the vertical bows take me. The hulls I have are very heavy volume forward of the current crossbeam location on the hulls. I have taken all of the bulkheads forward of the crossbeam location out. I plan on reshaping the hull to accept a bowsprit and improve the hull water entry.
I am thinking the beams will be between 14-16' wide. I figure I can go a little narrower because the boat will have double trapeze. I have checked out some other boats online of similar dimensions and think I can use 4" crossbeams in either carbon or aluminum. The new c-class cat's are 14' wide and use 4" dia carbon. The have a simple dolphin strike set up and I would imagine their compression loads would be significantly higher than mine will be. I am already planning a through hull dolphin striker set up if I choose to go with the tri vs. large cat.
Are there crossbeam ratio's for cats typically? I notice my 16sq is 17' long with a front beam location of 9' from the bows. The current location of the proposed hull cradles on the center hull is 13' from bow with 13' behind it so pretty much dead center of the hull. Although, i would say 65% of the hull volume is forward of the crossbeams.
Thoughts? Another thing I have to ask is how do I determine daggerboard trunk locations?? The current leading edge of the centerboard truck is just after of the current front beam.....
Thanks,
Jay[/quote]
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