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kleppar

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About kleppar

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    Norway
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    trimarans

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  1. Here is Mike´s description of his mast raising system: https://smalltridesign.com/masts/mast-raising.html
  2. As this is the first W17 with swing wing (similar to Dragonfly), we have not quite decided on the best method yet. However, the beams will be identical to the original folding system, and the hinges will also be at the same location; so the folded boat´s beam will be approx 2.4 m.
  3. But I guess you have to stand in the water doing it, or can you unfold with the boat floating in deep water? From what I can see you have to pull out the amas from the outside of the main hull, not push them out from inside the mail hull.
  4. I am sure SeaRail19 is an excellent boat, with its boomless mainsail; but as far as I can see it is a car-and-trailer-launcher rather than a beach-dolly launcher, so it did not fit my criteria. It seems the amas have to be unfolded on land, not in the water, and there simply are no ramps available for such a wide launch in my hometown. In fact, since the width of my launching area is only 3.5 m, I decided to build my W17 with swing wing folding, so that it can be launched folded, and then unfolded afloat. See photo of my ramp; the boat is kept on land 15 m from the ramp.
  5. There was a thread on boatdesign.net called Non-foiling trimarans under 20', also involving W17 and others; in this thread I spelled out my idea of optimal as follows: My criteria, in addition to non foiling and less than 20 ft., are: reasonable comfort; a cockpit to sit in with the ability to shift positions at various points of sail, rather than something flat to sit or clutch on to. I want to be able to enjoy a cup of coffee, to sit in some comfort etc. easy launch and recovery from beach; often means a flat bottom and low weight (I would prefer below 150 kg) good p
  6. Well, I shall have the boat built according to drawings - even if the sailtrack was S-shaped (well, that was a joke)! My builder has a good press, so shaping a straight track is easy. And yes, since my boat does not have beams folding on top of each other, but swing folding, I guess the track could have been straight...
  7. Here is the designer´s explanation of using a curved track: One might initially think that one easy mainsheet option could be to run a straight track over the after beam, but this would actually have to be either fwd or aft of the beam, to not interfere with the beams when folded. It would also mean a shorter tiller that passes behind the mainsheet as beach cats use, OR, a thro-transom rudder control (like the M23 uses for the same reason) ... a significant complication and revision for the W17, with inferior results. As a straight track could also change the thrust on the boom (requirin
  8. I plan to order new sails from Ocean Sails in Poland, which makes trimaran sails, not modify existing catamaran sails.
  9. No shortage of masts here (the Netherlands), but very little information about each mast, so you have to know specs of the boat types they refer to, which I do not: https://bnrwatersport.com/parts-categorized/catamaran-masts-for-sale.html Well, I am sure I can find out. Thanks for all your advise in this matter.
  10. A final question: If I find a good quality aluminium mast from a cat, which has most wing profile? The designer recommends MINIMUM of Chord/Width of 2.
  11. From what I have learned so far aluminium is easier to work with for modifying the mast (making new positions, etc.), more forgiveable in case of dropping mast, only slightly heavier, and a lot cheaper. I plan to stick to Mike´s sail plan, so that sails also can be reefed; boomless is of course a thought, but I shall probably go for the lightweight wooden boom as designed by Mike; I may even make it rotating, as suggested, and I have no plans of hiking out on a trapeze.
  12. From what I have learned so far aluminium is easier to work with for modifying the mast (making new positions, etc.), more forgiveable in case of dropping mast, only slightly heavier, and a lot cheaper. I plan to stick to Mike´s sail plan, so that sails also can be reefed; boomless is of course a thought, but I shall probably go for the lightweight wooden boom as designed by Mike; I may even make it rotating, as suggested, and I have no plans of hiking out on a trapeze.
  13. Marstrom has Eagle cat complete carbon mast in stock. I am not sure how long this mast is, and have asked.
  14. Well, I do not have limitless resources.....For sails, I shall probably use Ocean Sails in Poland. By the way, I have been told the Hobie 16 unstayed mast is very strong; 8 m. How would it work adding a diamond to such a mast? But contact Marström again is a good idea.
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