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boardhead

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Everything posted by boardhead

  1. Sorry, I stepped away, something other than boats came up! So my topic here and actually something I wanted to share was one of picking up sailing performance on cruising cats, which are becoming the standard tool for that dream blue water cruise. I know about deep, efficient daggerboards, just sold Skateaway, my own design and build tri with her sixty foot rotating wingspar rig and ten and a half foot draft - amazing performance but not what this seventy year old needs for Bahamas thin water cruising. The boat tracks really well as in the autopilot response is normally
  2. Sorry Zonker, you are WAY off here. The 316, maybe 1/4" wall, stainless (way enough to resist the oxidization burst loads) is as soft as shit - doesn't deserve to be called steel even) yield is in the vicinity of 65%. Any kind of grounding the tube flattens as it bends. For me it's a thick corrosion - but not electrolysis or crevice cracking - coating! The alloy is 6061T6 which has a much higher yield point and certainly does make the stock much stiffer and stronger. Having bent and straightened the hollow tubes on two occasions (quite easily) the solid cores have since proven their worth
  3. The water collection system off the cabin top works well and we are frugal with water, you are correct, water is heavy! Having water tankage in the keels is one of the reasons I like the low aspect keels as it keeps the CG lower helping reduce pitching. With the keel end plates and all the other mods described here, plus others not mentioned yet, we were able to match the windward performance of a Dragonfly 1000 in 15-18 knots, true, under full sail, tracking through 90 degrees, tacking closer to 80 on the 160 mile Atlantic Highland Fling offshore race from Atlantic Highlands, NJ to Bloc
  4. The Saint Francis is pretty low rise and clean from a windage standpoint but bridgedeck wave interaction is an issue - you can't have your cake and eat it! Good shaped sails are worth the money and I spent a bunch in that department. With a full hoist headboard, eight foot roach, great battens and hardware the mainsail is night and day improved. Next I dumped the awful overlapping genoa for a vertical batten reefing/furling blade with new lead blocks set way inboard. Keeping handling simple for this old fart there is a tape drive Facnor headsail furler that is powerful enough to flatten
  5. No question the inside will get wet and salt chrystals will lock that alloy up so it NEVER moves. I drove the cores in with a sledge. Diametrically they were a tight fit so as to keep the structurally crappy stainless tube round and not bind in the bearings. The stock rudders weigh a ton and are built the industry standard of two molded halves wrapped around the stock with a prayer, a welded on plate for rotational connection. They are high on the "to do" list for replacement, I can easily make them stronger - where it matters - at half the weight.
  6. Well, I started by getting all excess weight (for my needs) out of the boat. The Saint Francis has low aspect keels, which I like on this kind of boat, so to improve their efficiency I put end plates on them in the form of two inch thick, high density divinycell cored panels which extend about two inches, horizontally, all around. I filled the tubular stainless steel rudder stocks with 6061T6 solid bar and added glass covered foam core to the top of the rudder blades nesting them against the underside of the hull with no more than 1/16" gap. The blades were faired out including the traili
  7. I sail a 1991 Saint Francis 44 which, like all cruising catamarans, is a complex compromise, design wise, with good and bad features. While "Gentlemen don't sail to Windward" fact is we have to and I have worked to improve performance in that area with significant success. I was interested in others efforts to that end so chime in.
  8. Hey Harry proas - that "quote" is what you made up after you "corrected" me with regard to my "misunderstanding" of cavitation being - in your opinion - ventilation. I never mentioned ventilation and I WAS talking cavitation ie flow separation as a consequence of turbulent flow over this stupid low speed surface piercing foil being sloshed through breaking waves - as in upwind -where I WINESSED one snap off. So why don't you back off trying to sell your half assed, theory, when I was just contributing a personal experience of the failure of an early example of a different approach to co
  9. Well,I was referring to real, not toy, boat applications - you know, the kind I would take my wife and kids offshore in - without helmets! Upwind in serious waves the vertical foil - the one that enables you to make progress in that direction - does load and unload fairly brutally but more so if it is surface piercing suspended underwing with diminished support compared to a foil exiting the bottom of a hull.
  10. In the "Good 'Ol Days" deep center (conventional) keel boats would have legs bolted, amidships, through the topsides to prevent their falling over sideways as they settled on the falling tide, twice a day, without any issues. Those legs had to be unbolted every time you went out for a sail and re-fitted before heading ashore. Typically, standing high and dry was the normal berthed condition.
  11. Mike Henderson did the 1964 OSTAR in a little catamaran with a centrally located, ballasted, centerboard. Somewhere I have pictures of that boat sailing at, maybe, 70 degrees heel angle - VERY forgiving stability curve. More than one were built that way. I raced against Spelian, a 33' catamaran with a bridge deck mounted centerboard in the 1980 Chrystal Trophy. On the windward bash from Cherbourg, CH1 to the Lizard Light we were boat for boat until they broke their headstay bridle which they proceeded to repair with a length of anchor chain! So here the come again only to shear off the c
  12. Congratulations - She looks Absolutely Awesome!
  13. A chainsaw and a flatbed! (the chainsaw might be a tad extreme) She was moved that way in her infancy so it's been done and I have pictures. JUST SOMEBODY - PLEASE - DON'T LET THIS GREAT BOAT DIE!!!
  14. Yes she is - but time is running out, the ex owner gave me the yard contact name/number. The yard wants the space she occupies and she will be cut up.
  15. Am I missing something here? The link pulls up a 19-20 year old Maine Cat 30 for $140k - thats a deal?
  16. It is rather sad, as racinginparadise points out, that the enthusiasm seen for "legendary" old Newicks is lacking - for a more capable design! Volantis kept my wife and I safe in conditions that would have overwhelmed the similar sized Val or, for that matter an F31 and that's just talking form stability without getting into structural limits. She needs a glorified paint job for goodness sake - a tiny fraction of the Triple Jack rescue - the rig is like new - TJ's was destroyed.
  17. So in contrast to the progress on skippermartin's Tango I spoke to Volantis's long time owner yesterday and he told me he had given the yard in Essex permission to cut her up and put her in the dumpster as he is tired of paying the rent! Thinking back on our incredible experience building and sailing Volantis and the life changes we benefitted I am lost for words. I can only hope that multihuller will not allow Skateaway to suffer the same fate, both these boats are tougher than me. Volantis owner told me she was still in one piece and can be had for $0,00 and in my estimation t
  18. Meanwhile, on Summer Magic we are 56 miles from Wilmington, NC! - shiny side up, of course!
  19. Thermal expansion and contraction, possible (even soft) collision damage, crystalline salt and also ice action gnaw away at any flaws or cracks which develop particularly as the resin ages and becomes more brittle.
  20. OK, so how about some shots of the before and after - who knows these clueless "keyboard experts" might learn a thing or two while potential buyers are genuinely reassured. Did the top molding simply peel off the lower? Cementing components together without external filament wrapping is questionable at best.
  21. Huh - 50' substantial cruising trimaran so, what, at least 20 kg anchor and attached length of chain plus the furler and that lot beating the snot out of the shiny new bow while threatening to remove your fingers as you grapple with it - that is NOT a "pretty minor issue". The owner and his insurance company must feel relieved that the toy bowsprit didn't fail in it's other role supporting the anchor rode in a blow off a rocky lee shore - happens all the time blue water cruising.
  22. So I am thinking it's about time the Olympics reinstated a multihull into the competition and the additional expertise involved in getting the most out of this boat, level of physical agility and minimal cost compared to the wonderful but excluded Tornado make the Patin an awesome candidate.
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