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Today I used the Carlson Hull plotter and Freeship to draw up some rough sketches for my ama. I love this program, it is easy and fun to use, I only spent about 20 minutes tweeking this to get what I wanted. I want a fine entry, enough bouyancy to hold my weight if I am out on the ama, and a good bit of rocker. Most of the submerged area is in the front half of the ama, and I am guestimating that will be good for lateral resistance.
Amas 1 and 2 are 16' long, Ama1 has a max beam of 18" and ama 2 is 12" at max beam. Both were desigend to be made using 3 sheets of 1/4" ply, stitched and taped using fiberglass and epoxy resin. These are closer to a the Hobie 16 hull that was sailed with this craft before as an ama. The center of area would is further forward on 1 and 2.
Ama 3 is 14', and symetrical fore and aft, with no transom. The idea for this is essentially a long bouyant float to provide lateral resistance on either tack. Not sure if there would be any value in extending it to 16' or even 18'.
 Ama 1
 Ama 2
 Ama 13
I'm not sure how it happened, but when I imported Ama 1 and 2 into the Freeship cad software, it rounded the bow. It looks cool, but I am afraid it might dig into a wave. I have seen pictures of other multi hulls with anti-dive plates attached. If I stay with the rounded look, I may add some latter. I don't expect to have the ama submerged a full foot, I just did not change the designed waterline when I imported the lines into Freeship. The carlson hull files are more angular.
Next week I hope to get down to a local Fiberglass/Epoxy dealer, Fiberglass Coatings, Inc. They seem to have great prices on resin and fiberglass tape. I will also pick their brains on how best to patch the 4' hole where the centerboard used to be.
I don't plan on putting the centerboard trunbk back in, but a little voice inside me keeps telling me that would be best. I am not sure, yet but I will decide after I build the ama.
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