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lurker1

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  1. That's interesting, I would have thought the foils would increase righting moment more than they increase efficiency and lead to larger but flatter sails.
  2. Why is BP sailing a daggerboard boat rather than the boat that won the last Vendee? Are they reducing their spending on IMOCAs or do they have a new boat in the pipeline?
  3. At 6:35 you can see the B&G display showing SOG, wind speed, depth, and heading. So he's got a B&G autopilot at least for the brains of the system.
  4. I wonder if the constant-ish curve foils are there to sidestep the high speed->excess lift->bow up-> ventilate and crash cycle caused by not allowing foils on the rudders. The other foil designs can move the lifting part of the foil in and out (charal and apivia) which controls righting moment but not lift or adjust the cant of the foil as it moves in and out (arkea) but none of the others seem to be able to reduce the area of the section of the foil that is actually loaded to produce lift. It seems like hb is the only one that can "reef" the foils to stay in skimming mode at higher s
  5. The issue with C-boards aimed outside is that if you're relying on them for both lift and leeway resistance then you've got both pressure and suction on both sides of the board and that is super draggy. It's basically negative endplating.
  6. If the foils have a symmetrical cross section near the tip then they could be used mostly retracted upwind so just the mostly vertical part of the board is in the water. In that mode they'd be sailing upwind with the foils loaded on the reverse side of when they're sailing downwind and the package would look pretty similar to the daggerboard boats.
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