Small Tri's under 20', any mention of foils is banned..

Discussion in 'Multihulls' started by waynemarlow, Jan 13, 2015.

  1. waynemarlow
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    waynemarlow Senior Member

    Not at all, I do believe f**** have a place in sailing, just not in the day to day run of the mill, fun and practical 20 ft Tri's.

    Can we please get back on topic then. Lets talk about 20ft Tri's.
     
  2. upchurchmr
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    upchurchmr Senior Member

    Doug,

    You and everybody has made their own point.

    I personally read both threads.

    But you are not making friends by insisting on pushing the issue.

    Please quit in this thread so I can read some civil discussion.
     
  3. Doug Lord
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    Doug Lord Flight Ready

    Under 20' tri's

    This thread is about small tri's under 20' but I haven't seen any discussion of 12-14' tri's. Do you think such small tri's have any future?
     
  4. Doug Lord
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    Doug Lord Flight Ready

    ================
    I personally believe it is abhorrent for someone to attempt to ban discussion of something that can be really important to the design of small trimarans.
    Especially when they themselves intend to use the banned technology.
    The issue needs to be pushed because of the issues raised by somebody setting themselves up as Censor in Chief. It just isn't right.
     
  5. P Flados
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    P Flados Senior Member

    I agree that there really is a place for the crowd that wants displacement mode only.

    More advanced approaches can take advantage of "non-vertical ama dagger boards" to provide "assist mode". Even more advanced approaches may make it practical for sailing with hulls out of the water.

    However, this thread is about about a cost effective boat with more comfort / stability than a beach cat. The practical considerations for most end users require the ability to easily tote it around on a trailer pulled by something like a small SUV.

    The lowest cost and simplest solution will normally be a single dagger board (or equivalent) and a single rudder on the main hull.

    Some amount of "assist mode" may be possible and still be practical. A builder may want to use beach cat hulls for amas and may want to stick curved daggers in the existing slots. This would be a minor aspect of the overall design. Even if it takes a little more work, "assist mode" might be a reasonable feature for a boat on the high end of the performance spectrum or for a boat with low ama volume and where improved gust response is desired. However, this would be a "minor detail" in the overall boat design.

    So again Doug, please let these guys focus on all of the other details first. If an overall package looks good without ama foils, let it be. If a boat meets all other requirements and happens to have some "assist mode", it can probably be discussed in proper context (a minor choice) without distorting the overall intent.
     
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  6. Doug Lord
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    Doug Lord Flight Ready

    ====================
    OK, Paul-I've gotten it off my chest more or less.
     
  7. waynemarlow
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    waynemarlow Senior Member

    Ok we now seem to be back on track simply talking about the Pulse 600, SeaRail 19 type of boat.

    We have to be realistic about these boats, no they are not going to be as fast as a similar beach cat, but then I think there maybe a bit of the hare and tortoise, the beach cat is tough to sail beyond about 4-5 hours, certainly the occassional 6 hour races I have done, they have ended up being quite tedious and prone to mistakes in the last couple of hours. There's nothing worse than trying to recover a cat when you're tired and within sight of the finish.

    But the T20 style of boat, now that has a few more creature comforts such as a place to store your sandwichs and perhaps store a hot drink, all from the comfort of a cockpit, from experiance that counts for a lot and just may mean the boat can be driven harder for longer.

    Racing though is going to be only just a small part of these boats activities, I think they will be used for day sailing to nice beaches and trailed to places where you would not normally launch from. Perhaps over nighting with a cockpit tent cover who knows or just simply cruising to a port and using the local B & B as accomadation.

    As its 2 degrees and raining outside I guess that may just be my imagination running wild.
     
  8. RHP
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    RHP Senior Member

  9. rapscallion
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    rapscallion Senior Member

    Don't forget the scoundrel 22, the f22, and L7.

    Although they are slightly bigger, they could conceivably provide good racing with the pulse 600.

    I'm just working out a rehash of the Trinado concept that would be lighter than the pulse, have a longer main hull waterline than the pulse, is built from plywood, looks like a stealth fighter (facet design/polydesign deckhouse)


    Here is a question for the t20 folks, My understanding of wave piercing bows is to simply distribute hull volume over a longer waterline length, thereby providing the same boyancy for a given displacement. Would it be worth the extra weight and windage to add 25% waterline length to the main hull in order to get a finer entry and a smoother ride?
     
  10. waynemarlow
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    waynemarlow Senior Member

    My understanding of the wave piercing bows is not anything to do wave piercing but more to do with getting as much volume as low down and as far foward in the hull as practical. As a consequence the very early volume at the base of the bow tends to flare the bottom section creating this reverse looking bow.

    I've read a number of papers on this and there's no real consensus to whether it works or not in small catamaran style hulls, simply for and against. There was a very long thread a long time ago here on Boat design, perhaps search it out.
     
  11. Russell Brown
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    Russell Brown Senior Member

    I know that Richard is the only one with permission to try and sell things on the forums (joking Richard), but these molds are still sitting in my container.

    http://www.ptwatercraft.com/ptwatercraft/Trinado_molds.html


    I haven't tried too hard to sell them because they aren't in my way, but it seems like a shame that there is only one sailing as it's such a fantastic boat.

    Russell
     
  12. Doug Lord
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    Doug Lord Flight Ready

    Russell, did you design the boat as a whole-other than the amas?
     
  13. Corley
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    Corley epoxy coated

    It's abhorrent that human and civil rights are being wound back worldwide with the excuse being that it will protect us from terrorism. It's abhorrent that civilians are being slaughtered and refugees being mistreated. A bit of perspective a thread on small sailing leisure trimarans requesting no discussion of float foils is not abhorrent.
     
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  14. warwick
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    warwick Senior Member

    Trinado

    these are slightly over size.

    these are some photos I have of the trinado

    [​IMG]

    [​IMG]


    And the L7

    [​IMG]
     

    Attached Files:


  15. Ilan Voyager
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    Ilan Voyager Senior Member

    Warwick, it's far too big for the thread, but I like the comfortable seats! (and the tri)
     
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