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Ovakus

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  1. Speaking of the Bieker proa, does anyone know what is the current status of this Bieker proa build: http://proa32.blogspot.com/ ? There hasn't been any activity in a long time. Did the build stop or did just the blogging about it stop?
  2. One utility of tacking outriggers is to allow for an interesting experiment comparing a pacific to atlantic proa by simply tacking. I get it that the comparison is not perfect but still my impression (correct me if I'm wrong) was that most tacking outriggers don't find that one tack is significantly faster than the other and I always thought that was interesting. The two configurations are different enough that I would have guessed that a preferred tack would emerge.
  3. The Vaa Motu is really a great looking boat and the whole project seems really cool. And the music is dope. I watch this video once every month or so for motivation to keep building and just get sailing. See Gary Dierking's blog for some more: http://outriggersailingcanoes.blogspot.com/search?q=fakarava
  4. Maybe there are portlier proas (and this one I'm pretty sure is a tacking outrigger) but still see https://proafile.com/multihull-boats/discussion-forum/viewthread/231
  5. Though not for Jzerro or even a for boat that was built (to my knowledge at least). Here is a calculated curve for a pacific proa from http://www.pacificproa.com/faq.html The general idea of the pacific proa plus pod that attracts me is that if the wind pressure produces enough heeling to get past the max righting moment near zero degrees then (assuming the wind hasn't dramatically piped up even more) there should be more than ample righting moment to keep the boat from climbing up and over the second local max (provided by the the pod submerging) because at those angles of heel the wind
  6. Now I have my dreamt of foil proa issues somewhat clarified after some interwebz searching. It appears the foil was used on Mbuli but not imported over to Madness: "I had a discussion with John Harris of CLC Boats about his Bruce foil configuration used on the Ama of his Mbuli design. Why did he not continue the concept on Madness? His answer was brief and clear. The first time he grounded the Bruce foil on a sandbar and walked out on the trampoline between the Akas to pull up the angled foil he snapped the foil off at the exit of the trunk from the added weight. Practical real world pro
  7. The Pizzey mode (ie lifting foil) seems interesting to me. If the foil accidentally leaves the water then the full weight and righting moment is felt by the boat. I guess I like the reserve righting moment aspect of the lifting foil. The opposite configuration seems scarier to me -- if the foil loses its grip on the water, the righting moment can drop dramatically right when the wind is piping up. I vaguely remember John Harris at CLC putting some kind of foil on Madness. If I'm not dreaming that, what happened to it?
  8. It is an interesting question though: How much speed do you gain when you just lift the ama off the water -- and how sketchy is it? Or said the other way, how much of a speed penalty are you paying to have the windward hull somewhat immersed but yet ready to respond to changes in wind pressure?
  9. Wess, Are you assuming that the windward float on a pacific proa is "already air-born?" If so then there is part of your confusion I think. It can sailed with the windward float air born but that is a precarious, unstable position. Instead assume that prudent equilibrium sailing has the windward float always immersed some and therefore providing some buoyancy. Yes there is more drag but as the wind induced heeling moment increases, more of the windward hull is lifted out of the water in response. Right up till the moment the windward hull lifts, the righting moment is increasing. So as long
  10. Zonker, I was turning to Kevlar for its impact resistance. You are right about its compressive properties - thanks for pointing that out. So use it on the inside of the panels (See Gougeon Bros. on Boat Building at 394-395) despite it looking like a pain to prep and laminate inside those tight spaces (but the plus is you won't have to deal with fairing the Kevlar on the outside). Maybe I'm looking at this wrong though? Yes the ocean isn't as sharp and pointy like some steel impactor dropped onto a panel but at 15+ knots clipping the top of some steep, confused, short period swell is still
  11. Agreed about kevlar being a pain to work with. As to stringers, why not put them on the outside (epoxied, filet'ed and glassed to hull)?
  12. Surely there are repair issues to attend to but are there initial thoughts about reinforcement of the pod seeing as you are already making repairs? For example: 1) Strengthen the panel with something. Add kevlar outside and maybe inside on the lower leading edges of the leepod? My guess is kevlar is better than carbon here but others know this better than I do? 2) Add more wood to the leepod -- laminate on another layer of plywood and fglass or exotic fabric on top of that 3) Add exterior stringers of some sort along length of bottom of the leepod running fore and aft (fore and fore in t
  13. Perhaps I missed it in the discussion but where is the energy for the RO unit coming from? It looks like the Katadyn needs something like 31 Wh/gallon. It was my impression that manual actuation of the pump was only for emergencies even then the conventional wisdom is that it might kill you from sweating/exertion. It seems like Jzerro has more than enough boat speed to produce a ton of energy with a Watt and Sea but of course that is also alot of additional money. What is the smarter (ie least worries), cheaper, lighter ways to power the desalinator? Some design choices: 1) Solar 2) Watt
  14. Tracker Speed: 0 . And that is a good thing. F*** Yeah. Great job Ryan. Well done. You and Jzerro back at the dock. Sailed right to the slip? Double F*** Yeah.
  15. For now, looks like he is underway again. But after that washing machine he went through and all that wind, to be becalmed when he is getting close is just too much.
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