Build a catamaran, then convert it to a trimaran

Discussion in 'Multihulls' started by neptunkryssare, Oct 23, 2012.

  1. neptunkryssare
    Joined: Sep 2009
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    Location: Stockholm, Sweden

    neptunkryssare Peter

    Hi,after beeing in theese forums and talking with a lot of nice people I got a lot of help finding plans to what soner or lateer will become a boat that I will love to build and sail --> http://www.boatdesign.net/forums/multihulls/help-finding-plans-my-dreamtri-29358.html

    Thankyou Jamez for suggestig Stinger MKII, I am thinking about that boat almost every day - and someday I will build it.

    This has not been done yet, mostly because of lack of space to build it, but also lack of experience, So my decision is to begin with something smaller that I can build in my home.

    Shortly, I want to build a beachcat which I can start to use as soon as possible. And then I want to build a mainhull so I can convert the cat to a trimaran.

    Maybe I also want to attach foils

    I willl probably use rig from this boat (not mine in the picture).
    [​IMG]
    Mast is 6m, mainsail and jib is 10m2 And it has a spinacker which is 8m2.

    I have done some reseearch and have an idea which designs to pick from when it comes to the beachcat part. But when it comes to the aka - I have no idea where to pick from.

    I would it to be - if possible, like a smaller version of osprey, or something like this one http://rogermann.org/puddlecat/designs/ragwing-seven-trimaran/ .
     
    Last edited: Oct 23, 2012
  2. Richard Woods
    Joined: Jun 2006
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    Richard Woods Woods Designs

    Sounds like my Strike 16 and 18 trimarans would suit you

    Richard Woods of Woods Designs

    www.sailingcatamarans.com
     
  3. neptunkryssare
    Joined: Sep 2009
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    neptunkryssare Peter

    Actually I have beem looking a lot at your products, and the catamaran part quattro 14 / quattro 16 goes pretty much in hand with what I plan to do,

    But I am not pretty sure I want to have a 'cockpit' on the aka.
    The reason is that I want it to be built quite fast so I can have it in the sea as soon as possible. Then I can feel confidence enough to build a more difficult project.

    I guess I probably could build the aka and avoid building the cabin, maybe add it later.?

    But if I don want it there, it means less of the weight which give that I ultimately should have other dimmension on the aka.?

    A side question - is it possible to make the 'cockpit' part of the cabin - to make it detacheable.?

    Which rig do you reccommend to your strike 16 / strike 18 trimmarans.? The same rig as you use on the quattros.? Or a bigger one.?

    Your quattro is one of my top choices, but I really would like some more input before I decide about that.
     
    Last edited: Oct 23, 2012
  4. luckystrike
    Joined: Feb 2010
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    Location: Germany

    luckystrike Power Kraut

    Hi Peter,

    your old thread stops three years ago and it has basicly the same topic. No progress since than? What is your time schedule and your budged?

    If you are able to buy a old but good Hobie 18 this fall/winter you can go sailing next summer. I have a mainhull on my drawing board that will work together with (leghtend) Hobie 18 hulls as amas. It will also use the rig, boards and rudders of the 18.

    The Hull is a fast and cheap to build and sail sharpie hull made from around 10 sheets of 6mm okume marine plywood, ariound 20kg of Epoxy and some (top grade, knot free) nordic fir. Aluminium tubes or mast sections (from old broken masts) make the new beams. The hull is (in the moment) 6.4m long, will be very light, will sleep two, sit two with sitting height, have place for a cooker and some stores. Wheight will be under 150kg, so the whole tri should weigh in at 300 to 350kg with a displacement around 600kg.

    Take a look at a first scetch here: http://www.boatdesign.net/forums/multihulls/post-your-design-ideas-37103-9.html

    Design and engeneering work ist just starting. If you have a real interest and this thread is no brain bubble I could send you the first construction plans for the mainhull just in time for christmas.

    Best Regards, Michel
     
  5. Richard Woods
    Joined: Jun 2006
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    Richard Woods Woods Designs

    I think it would be better if you contacted me direct by email with your questions.

    I have lots of videos of my own Strike 18 sailing on my youtube channel. Over 50 Strikes plans have been sold, several Strike 16s are now sailing, while I sailed a home built Strike 18 based round a Prindle 16 a couple of weeks ago

    Richard Woods of Woods Designs

    www.sailingcatamarans.com
     
  6. neptunkryssare
    Joined: Sep 2009
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    neptunkryssare Peter

    To me it depends about money, and where I can be.
    I don't have much money - else I should buy used hobie parts and work from there.

    Also - regarding to my old thread, that boat is about eight meters and my workshop have no more than 5 meters (give or take a few decimeters) from corner to corner. Then I have no carport or so, just traditional doorways. So I have to keep it small.

    Also I can't spend 1100 dollars on plans which I am not sure if I can manage to build both regarding to the space needed and also regarding to the lack of expericen I have.

    I had almost given up my plan about building a boat because of the limitations I am surrendeed with. Therefore I now understand that I have to keep it smaller. So I can build it in the workshop I have in my aprtment.

    My time schedule for now goews mainly support my kid so he can be done with his boat-project. My money goes there and to buy a cheap boat (either a dingy or a little yacht) so I can be out and sail with him this summer.

    Also the little money I have left will go to his three weeks sailing camp. so there will be no money left until next autumn. And at that point I will begin to build MY boat, And probably he will help me a little with that.

    Also, I have not had the gutts to start the project that was in the old thread, because to me as completely amatour . it seems so much more difficult than build a cat.

    Therefeore I calculated it's better start with a cheaper set of plans, cheper material regarding to the amount needed and fasteer building time.

    I have spent the last three weeks doing research for this project and will buy one or a few sets of plans as soon as possble..

    This is the boat he is building [​IMG]
    - and it is almost done. Expected completely done coming summer as he is bizzy with school and just have one or two days a week to put on that boat.

    And this thread is no 'brainbubble', but I prefere to pay for plans that re built and tested before.

    And from now I would like stick to topic - thank you.
     
  7. neptunkryssare
    Joined: Sep 2009
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    neptunkryssare Peter

    Ok, I think that I didn't express myself really when I openrf this thread. So I will open a new thread where I am more specific in what I really want to know,
     
  8. neptunkryssare
    Joined: Sep 2009
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    neptunkryssare Peter


  9. luckystrike
    Joined: Feb 2010
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    luckystrike Power Kraut

    Hi Peter,
    Ii want to apologize me for the brain bubble, that was not correct.

    But the questions for budged and time schedule are somewhat important for every project. So these are not off topic.

    No one spends 1100 bucks for a small boat plan, thats for sure, but I really can understand that you want to build a proven plan and no prototype. Feel lucky to have a workshop in your appartment, I wish I had one there. Use your phantasy to make the best out of your possibilities. For example: A sharpie mainhull like Richard's "Strike" or mine could be built in two segments and joined one fine weather week in summer.

    If you want to build on a tight budged its useful to have detailed epuipment list and some money always available to get bargains on Ebay. There are a dozens of posibilities to save money on a boatbuilding project without compromising the quality of a boat. The length over all is somewhat imoprtant about that, but not the only factor.


    By the way, nice boat above!

    Best Regards, Michel
     
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