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SeanPurdy

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About SeanPurdy

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    UK south coast

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  1. Making that prediction once was optimistic in the extreme. To keep on doing it? Well ...
  2. RC also says that with the new big wing the boats are predicted to foil in just 4 knots of wind. That really is extraordinary.
  3. Interview with Russell Coutts in the latest Seahorse says the season final will be three boats "if we are happy with the format". "That is exciting as it reduces the possibility of a one-sided race, and it also allows more jeopardy. The team lying third could come out winning." Doesn't specify whether he means lying third in the final event or overall for the season - presumably the latter.
  4. Picking up on the feathery theme from upthread, I saw this post on gust response in birds' wings on the brilliant blog Fuck Yeah, Fluid Dynamics: "In flight, birds must adjust quickly to wind gusts or risk crashing. Research shows that the structure of birds’ wings enables them to respond faster than their brains can. The wings essentially act like a suspension system, with the shoulder joint allowing them to lift rapidly in response to vertical gusts. This motion keeps the bird’s head and torso steady, so they can focus on more complex tasks like landing, obstacle avoidance, and pre
  5. Four years ago, when Armel le Cleach was in roughly the same spot as Yannick Bestaven is now, six boats had passed Cape Horn. This year the 17th is about to pass that landmark and there are six boats within 200 miles of the leader. This is a truly captivating race!
  6. The counter-intuitive “contrary current gives higher speed over ground” thing does work for high performance boats that might increase their speed by 3 knots for just a 2 knot increase in wind speed. Imagine a foiling boat doing 12 knots downwind with zero current and a ten knot “ground” breeze - and therefore 10 knot TWS. Add 2 knots of contrary current and TWS increases to 12 knots … and boat speed to 13. That 3 knot increase in boat speed exceeds the 2 knot loss from the current so it’s a net gain in SOG. Yes, I know it’s not that simple and you can’t sail dead downwind blah
  7. Great work by Pip Hare and Didac Costa to wriggle free of the ridge and into the circulation around the top of Theta. 36 hours ago they were in a group with Miranda Merron and Ari Huusela and now they’ve opened up a 160 mile gap - which is likely to double or more over the next 24 hours.
  8. This made me smile. I’ve yet to experience this “complete control” thing that you mention, although I have seen it done so at least I know it’s theoretically possible!
  9. When we got ours she was 20+ years old and the non-skid had peeled, cracked and gone at many corners. It still provided good grip but looked terrible and really held onto dirt. We stripped it all (which was fun) and painted with Kiwigrip - very happy with the result. Love the idea of your spline weights changing the trim of the boat. What were they made of, spent uranium?!
  10. I've owned a Valiant Esprit for 15 years and have never sailed a Crealock, so you should adjust for bias. But ... The Nordic-built boats (as mine is) are blister-free, but I believe some of the Uniflyte boats had blister issues from the resin they used. Should be easy to confirm - post to the Valiant Owners forum on Yahoo and you'll find someone who can probably give you history on the specific boat you're looking at. Our water tanks are the original aluminium from 1979 and still keep the water in fine. Won't last forever but I'm not planning to replace unless we have to. We replaced
  11. But a simulator - now that would accelerate the learning!
  12. I am a foiling beginner (I have been for a while now) and my experience with the waszp is that better flap control would not make learning any easier. The effects of sheeting, steering and body movement are simply orders of magnitude greater than the wand/flap component of the control system. To echo a point that was made up-thread, the reason it’s hard to learn to sail these boats is because you need to coordinate body, sheet hand and tiller hand constantly to keep everything in equilibrium. And you need to anticipate what’s about to change, because if you just react to it you’re alrea
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