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boardhead

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Everything posted by boardhead

  1. Go Get ‘em Steve - your Last Hoorah!
  2. Hmm - OSTAR and TWOSTAR running consecutively - interesting I might not be too old for a TWOSTAR - - - -
  3. Because you would be replicating the same questionable method of two halves, stuck together, which put too much emphasis on appearance and cost, less on structural integrity. Better to lose the flanges on the other two beams (like this model did on the ama deck joint) so they match the repaired beams and save yourself the time and materials on a mold nobody needs. Hey - grind the gel coat off the “good” beams and wrap them in some filaments that add strength and rigidity in place of deadweight.
  4. Wess - Mr Pantouf’s most recent gig was to deliver some kind of floating device from Curaçao to Palma - for a living - and he was interested in buying a cruising trimaran, viz-a-viz a Rapido - he sure don’t sound like a couch potato. He bowed out when the shit slinging started but he’s back - warts and all - and sounds knowledgeable.
  5. I would align and locally scarf/laminate the remnants together and essentially create a male mold. Fair and thin down the old laminate to a wafer thin shell then laminate a properly fiber oriented new beam over it expecting nothing from the mold, structurally, just a form. The glued flange deal sucks and could easily be abandoned in favor of continuous filaments connecting the top and bottom elements at plus/minus 45 to better address the shear loading. Maybe the net attachment loading contributed to the fail - did any serious porkers party on that net!! I have to believe that expan
  6. Now you just stay well away from that Horstman - you bad boy - Stephen Marcie! :D

  7. I guess the C foil option would ADD to the weight - are M&M sure that puppy is still gonna fly?
  8. Stayed away from it in structural laminates but it makes crap running and standing rigging. Bulletproof vests for those dodgy exotic cruising grounds - OK!
  9. I quoted Dyneema shrouds for one of these floating condo's and the stock stainless rigging I was instructed to match for breaking strength was insufficient to effect a capsize. When I questioned the sizing it turned out that, yes, the rig will carry away well before a sail over capsize occurs so they probably reef at specific wind speeds. The righting moments on these big, heavy cats are huge and they need not be wide, the mass does the job!
  10. Volantis is all Airex cored with unidirectional, correctly oriented, external skins on the outside and CSM inside. Bulkheads, floors and much of the internal structure - Airex _ materials today would cost a bunch. Originally demountable she is easily cut into three sections for trucking to a workshop for the rebuild and I will be available to advise if a new owner requests - at no charge.
  11. Thanks Wess, your experience and thoughts are appreciated and well taken. Sounds like your experience was really awful. Peter has advertised on Craigs list and had a couple calls. This boat is a little different from the F27 being much heavier, a mini blue water cruiser which would probably have survived your new owners barbaric abuse. In spite of the shocking pictures seen here her condition is still structurally robust and a spirited facelift after the application of some foam cored patches to restore the ill conceived mods would yield a super cheap adventure for an enthusiastic c
  12. I guess covid sidelined Sail4beer's involvement in the restoration. Peter, the long time owner called earlier this year and said his recent retirement would allow him to restore Volantis to her original spec and he would abandon his efforts to make her more "yachty". Peter emailed me today stating he would either sell her as is or break her up which, as you can imagine, I find rather heartbreaking. Volantis is still fundamentally sound, a project I would have given my back teeth for when I was a kid. I imagine the purchase price would be little more than a handshake. I would gladly a
  13. Tony used to be "in the other half of the building" in Sandwich, Kent (next to Derek Kelsall's Sandwich Marine) where he built the Telstar range of trimarans, mostly the twenty six footer which became the 8M. The common thread with the Telstar and Gemini range of multihulls was their affordability, Tony was expert at putting just enough into his boats to get the job done and he made a lot of them - pretty sure over 1,000 105's in the States. As has already been stated here they were not the greatest quality or the highest tech but they made it possible for guys to include the wife and fam
  14. From an education standpoint it would be nice if the designers would chip in and good on you Paul for being the piggy in the middle as they keep mum. The answer get's more perfect as the end product's primary use get's more specific. Current buoyancy distribution looks like small waves and motoring are in focus.
  15. Stratosphere still looked structurally intact in the pictures, I guess the hull bottoms were ground away. Looks like the tropical sun is reducing her to dust as the resin degrades - needs a bit more than a splash of paint! Thanks for sharing.
  16. Not seeing any numbers pop up here for F36 ama buoyancy so I guess the best we can do is 2flit’s analysis:- ”Half depth in the mid section with huge forward watertight compartment and also a small one at the aft end” - sounds in the region of one third the volume, OK. 5,000 pounds at 25 pounds per bucket (3 gallons @ 8.34/gallon) in 2 1/2 hours (150 minutes) or a bucket full every 45 seconds - man, what a work out - these are tough people - but OK if that’s what it was. So if we use these numbers the ama buoyancy is around 15,000 pounds which sounds high to me but so be it.
  17. Well, I don’t know, that’s why I am asking! I believe that, on a trimaran, the buoyancy of the ama - in pounds or kilograms- should be one of the primary listed dimensions. The “off the cuff” % number has been used to fob off owners for years - what the hell does it mean when an accurate total weight is generally a moving target as is the recommended loaded maximum! While totally respecting your somewhat desperate situation baling the lee ama as your wife opened and closed the deck hatch “valve” (what a woman!) - I doubt it was one third full as the volume grows in the wider, h
  18. I agree and for shorthanded sailing that's how development went but for smaller inshore boats both movable ballast options have been successful.
  19. Blue water cruising a trimaran in serious weather you need ample buoyancy in the lee ama 'cos when that big one comes along it will try to fling the two weather hulls up and over that lee one. I am not interested in flying two hulls under a press of sail, rather staying shiny side up and being safe sailing fast in big waves.
  20. So this topic is about 40' and 50' Rapido's and my interest here focuses more on the 40 which is, or should be, big enough for a couple with small kids to cruise extensively. Your F27 - not so much, maybe you could provision at the local BK before you cast off and yes, for the weather you are likely to encounter if you head out a bit, it is unsafe. Newicks - well Jack Petith did great along with many others, not really F27 comparable. Of MUCH more interest to me here is how the more "modern" wave piercing, high buoyancy amas, with or without C foils work out on a forty foot tri
  21. So to clarify the preceeding, as a guideline and something to keep the big picture in perspective, would restrict the maximum displacement, for a trimaran, to two thirds the weight that the ama can support. The distribution of that buoyancy along the length of the ama will also be influenced by the vessels intended use and will be subject to change if the use of C foils is considered.
  22. I think we need to recognize there is a difference between catamarans and trimarans in the consequences of overloading. Most cruising catamarans have sufficient buoyancy in each hull to support the weight of massive overloading so as weight increases so does the righting moment and resistance to capsize but damage from bridgedeck pounding can be a problem, rig overloding and of course those grin generating bursts of speed diminish. Modern trimarans typically have amas with reserve (greater than 100%) buoyancy sufficient to fly two hulls. I think it is important to know the total
  23. Define "production". Before the charter market gassed up the industry and filled the world with motor/sailing catamarans there were plenty of smaller "production" facilities. How many Piver trimarans did Cox Marine launch back in the sixties (like Russell said YEARS before Vagabunders were born) Crowther Buccaneers, Kelsall K39's, Shuttleworth's, Cross 46, Dragonfly 40 etc, all professionally built plus a sizeable fleet of professional or better quality amateur built blue water cruising trimarans. Anyway THANKS Rapido for the energy being stirred up here. It's a tragedy that
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