An extra-heavy-displacement 11ft long Atlantic Proa for circumnavigation

[Lodesman]

Originally Posted by www.artis.guru

Here is my train of thought:
1) The boat’s design has to minimise any rolling movements, as they are the component which makes the brain seasick. Straight up-and-down movements doesn’t matter, because our brain is perfectly accustomed to them, since it is the same kind of movement which our vestibular system gets when we walk.
2) In order to cut out the rolling movements, the hull must be mostly submerged, float vertically and have vertical walls, which eliminates any shape-stability and leaves the vessel with mostly vertical movement in waves (like a pencil with a lead attached to its end, floating vertically, 3/4 submerged). That means extremely deep draft compared to its length and beam.

I like outside-the-box thinking, but I think you should re-evaluate your assumptions. Have had discussions with submariners and they still get seasick when submerged. It gets better with depth, but there are various movement components, not just rolling that induces seasickness.

With the outrigger and sails, your design will be quite unlike the R/P Flip, in that yours will be subjected to more lateral movement at the surface. With the inertia of the heavy keel, the cockpit area will pitch or roll around the keel as its axis with each passing wave - like the end of a metronome needle. Add in the up and down motion, and you'll have the perfect vomitorium.

Normal sailboats don't actually roll that much. With the wind coming from a relatively stable direction, the boat remains heeled with a fairly minimal rolling component. There remains plenty of sway, surge, heave, pitch and yaw. Any individual's susceptibility to any of those movements tends to be quite unique.

[CaptainRivet]

how about making a long story short.
get a rescue boat from the oil platforms or big container ship, slap on a mast and try to sail...thats without doubt seaworth, can withstand couple of capsizing and will cure your dreams to reality.....


comes quite close to the design, advantage take the sail off and make a nice weekend home in the habour out of it...at least it won't cost you as much time and money and you can recoup most from fail.