12' and Under Trimarans-Ideas and Designs

Discussion in 'Multihulls' started by Doug Lord, Aug 24, 2016.

  1. Manfred.pech
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    Manfred.pech Senior Member

  2. redreuben
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    redreuben redreuben

    Are there any active classes sailing these boats anywhere ?
     
  3. Manfred.pech
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  4. redreuben
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    redreuben redreuben

    Small tri's

    I was referring to small tri's in general not just the Moanna. If I remember the Marples was built for a class and so was the Scarab but I've never seen much take up. Didn't the Italians have a bit of a circuit going at some point ?
    Makes sense to me as a training boat, stable, safe and fun ! Rather than tippy and a bit scary ?
     
  5. upchurchmr
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    upchurchmr Senior Member

    Safe is boring.

    I don't want to be sitting in the couch outside.
     
  6. Zulu40
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    Zulu40 Junior Member

  7. Doug Lord
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    Doug Lord Flight Ready

    Weta-wrong thread

    You're right but this is the 12' and under thread-the Weta has been mentioned in the Under 20' trimaran thread. The Weta is 14' ........
     
  8. Zulu40
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    Zulu40 Junior Member

    oh Im sorry
    I didn't make the 12' and Under Trimarans-Ideas and Designs absolutely transparent, in that take the Idea, and make it a 12' or under Design

    however...
     
  9. Manfred.pech
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    Manfred.pech Senior Member

    They do not only have a bit: http://www.diecipiedi.it/ns/flotta/flotta2.html and http://smalltrimarans.com/blog/growing-the-10-foot-trimaran-class/

    http://smalltrimarans.com/blog/more-photos-of-the-uffa-10-trimaran-under-construction/

    https://www.youtube.com/watch?v=ICT5KN2HxhI

    [​IMG]

    [​IMG]
     
  10. Skyak
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    Skyak Senior Member

    From the time this thread started I have been thinking that the most useful conversation would be 'Why should a trimaran be 10 to 12ft long?' I tend to think that there are major limitations inherent to that length and not many good functional 'fits'.

    10 to 12
    -single hand only
    -L/B of hulls challenged by load -limiting performance
    -boats come out more like stabilized skiffs than tris
    -easy to right capsize
    -wood usage? Lots of fragile thin ply.
    -ergonomically much better than 12 ft cat -sit up, feet down and room to duck boom in main hull

    Compared to 14' or more...
    -single, double or more crew
    -L/B 8+ is easy -less of a drag hump to plane
    -all tri modes, depending on load and wind
    -with care in design, still single hand self recovery from capsize
    -bigger, but handling, care and storage are about the same as 10-12

    I have a Hobie 3.5 I think about making a tri with -but I never considered a 12ft main hull -too short and pointless. More likely a 16+ft covered canoe main... the performance hit of the wetted area is more than covered by the greater length, possibly narrower wl beam.
     
  11. Doug Lord
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    Doug Lord Flight Ready

    MPX12 (mini Fire Arrow)

    I did a lot of research into a 12'* high performance trimaran design-the full specs are here:
    * my apologies: I forgot that this tri was 7" longer than 12'......
    http://www.boatdesign.net/forums/multihulls/mpx-11-very-small-high-power-trimaran-33686-15.html (scroll down)
    If I can overcome my physical trouble I'm leaning toward building a slightly detuned version of this boat-maybe a bit longer. This was originally conceived of to have just planing amas no ama foils to go along with the main foil. Now that would be different : she'd still have planing amas but would also have ama foils.
    There are a lot of fast 11-12' monohulls around-no reason in the world why a small high powered foiling tri would not work, I built a concept model:

    MPX-12 Specs-short version

    -- LOA-12' 7" (not including rudder gantry )

    -- LWL-12' 7"

    -- Main hull beam-5.29'-

    -- Main hull beam at the waterline -3'

    -- Overall beam- 17.5'*(15' cl ama to cl ama) updated and corrected 8/19/10--NOTE: approx the same overall Beam/overall Length as Hydroptere.(not including gantry on MPX-12) *tentative as of 11/10/10

    -- LOA- ama-10'

    -- Ama LWL(F&A dimension of planing surface)-1.5'

    -- Ama beam- 2.5(max and max at waterline-tentative)

    -- Ama Buoyancy - 3.25 cu.ft/ 208lb / 53% of sailing weight

    -- Sail Area- 178 sq.ft /25.5' mast length. Slightly taller than a scaled down A Class Cat.



    MPX-12-short rig:

    [​IMG]


    [​IMG]
     
  12. Doug Lord
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    Doug Lord Flight Ready

    Banshee Ambulance

    Another potentially high performance tri was the 12' Banshee Ambulance based on a Cherub main hull:

    [​IMG]
     
  13. Doug Lord
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    Doug Lord Flight Ready

    12 and under(more or less)

    ==================
    Might work-but I didn't understand that from your post. Sorry....
     
  14. outside the box

    outside the box Previous Member

    Doug

    Bazooka at 3.7 is 4" over 12' so apologies.

    22 are in New Zealand, 1 is in Fiji at a resort and at least 4 that are known of in Australia 2 being sold second hand recently.

    3 are in build presently.
    1 x Intro model, 1 x active model and 1 x excite model.

    Again apologies for being outside the 12' scope.

    Team Ezifold

    Bazooka aCtive.jpg

    BAZOOKA REGATTA TAUPO MARCH 2008 020.jpg

    Blast off.jpg

    New plymouth.jpg

    FIJI TURTLE BEFORE 2006 136.jpg

    bazooka2.jpg

    Bazooka De-rigged March 2012 001.jpg
     

  15. Doug Lord
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    Doug Lord Flight Ready

    Thats ok. Can you post some more detailed specs? Looks good!
     
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