Multihulls

Discuss multi-hull sailboat design, production and custom sailing catamarans and trimarans.

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  1. kimosadler

    Aluminum Strongall Sailing Catamaran Plans?

    kimosadler, May 4, 2009 ... 2
    Replies:
    19
    Views:
    53,243
    Rico chico
    Mar 1, 2024
  2. Michael78

    Multihulls Direct?

    Michael78, Feb 28, 2024
    Replies:
    0
    Views:
    1,296
    Michael78
    Feb 28, 2024
  3. lucdekeyser

    80 foot cargo harryproa

    lucdekeyser, Nov 15, 2020 ... 10 11 12
    Replies:
    174
    Views:
    47,564
    bajansailor
    Feb 23, 2024
  4. Jeremy Perkins

    Beginning: Hull shape and size

    Jeremy Perkins, Feb 12, 2024
    Replies:
    11
    Views:
    1,763
    BlueBell
    Feb 18, 2024
  5. Paul Scott

    Center of effort of the A class catamaran sail

    Paul Scott, Nov 24, 2022 ... 2
    Replies:
    16
    Views:
    3,347
    Erwan
    Feb 9, 2024
  6. tanjera

    Malcolm Tennant "Wild Thing" Tri

    tanjera, Sep 28, 2014 ... 2
    Replies:
    21
    Views:
    9,795
    oldmulti
    Feb 5, 2024
  7. Thule

    Wooden caramaran wisdom

    Thule, Jan 26, 2024 ... 2
    Replies:
    18
    Views:
    2,628
    Thule
    Jan 31, 2024
  8. Dolfiman

    Arkea Ultim challenge : the race around the world, in solo !

    Dolfiman, Jan 6, 2024
    Replies:
    8
    Views:
    2,192
    Dolfiman
    Jan 31, 2024
  9. Lucainbarca

    Rival 21 from batavento sailmakers brazil

    Lucainbarca, Apr 20, 2019 ... 2
    Replies:
    25
    Views:
    10,369
    Tchamo
    Jan 25, 2024
  10. Ilikebigboatsandicanotlie

    Limits to the beam of a catamaran ratio ?

    Ilikebigboatsandicanotlie, Dec 29, 2023
    Replies:
    13
    Views:
    2,983
    C. Dog
    Jan 19, 2024
  11. Steel Hull

    FAO 7.8 meter trimaran ocean capable?

    Steel Hull, Sep 30, 2023
    Replies:
    8
    Views:
    2,701
    gonzo
    Jan 16, 2024
  12. i_mac

    Mast Rotation Systems

    i_mac, Jan 8, 2024
    Replies:
    5
    Views:
    1,733
    Blueknarr
    Jan 15, 2024
  13. Corley

    Lex Nicol, did he ever create any stock plans?

    Corley, Mar 24, 2010 ... 2
    Replies:
    27
    Views:
    16,077
    C. Dog
    Jan 8, 2024
  14. James Wellington

    Solid laminate frp

    James Wellington, Dec 14, 2023 ... 2 3
    Replies:
    40
    Views:
    4,242
    latestarter
    Dec 26, 2023
  15. peterbike

    A bit of sailing history

    peterbike, Dec 21, 2023
    Replies:
    0
    Views:
    959
    peterbike
    Dec 21, 2023
  16. Michael Farmer

    Sailing outrigger canoe

    Michael Farmer, Aug 23, 2021 ... 2
    Replies:
    24
    Views:
    10,692
    Keern Haslem
    Dec 19, 2023
  17. Iridian

    Considering Homebuilding a ~50' Catamaran

    Iridian, Jun 10, 2021 ... 3 4 5
    Replies:
    69
    Views:
    16,684
    Air Tahiti
    Dec 17, 2023
  18. 8Petros

    Low-cost experimental platform cat for inland waterways

    8Petros, Dec 2, 2023
    Replies:
    10
    Views:
    2,092
    waterbear
    Dec 8, 2023
  19. trungpv

    Cost for a sail system!

    trungpv, Oct 15, 2014
    Replies:
    9
    Views:
    3,841
    Vijay Krishna
    Dec 7, 2023
  20. power boater

    Duet's consumption report

    power boater, Dec 1, 2023
    Replies:
    5
    Views:
    1,230
    fallguy
    Dec 3, 2023
  21. guzzis3

    Catamaran plans, who have I forgotten ?

    guzzis3, Apr 4, 2023 ... 12 13 14
    Replies:
    200
    Views:
    23,740
    waikikin
    Nov 29, 2023
  22. David Swingler

    Design idea for a 15' cruising cat

    David Swingler, Oct 16, 2023
    Replies:
    13
    Views:
    2,937
    Will Gilmore
    Nov 28, 2023
  23. Bob McDowell

    Where did Uffa Fox sail Shearwater Catamaran 990?

    Bob McDowell, Nov 26, 2023
    Replies:
    3
    Views:
    1,457
    Bob McDowell
    Nov 28, 2023
  24. Tony Kopp

    A challenging design

    Tony Kopp, Aug 23, 2023 ... 3 4 5
    Replies:
    61
    Views:
    8,327
    Tony Kopp
    Nov 22, 2023
  25. Joseph Guthrie

    Outboard motor sled design

    Joseph Guthrie, Nov 14, 2023
    Replies:
    3
    Views:
    1,575
    Joseph Guthrie
    Nov 15, 2023
  26. seadreamer6

    twin masts on cat thoughts on

    seadreamer6, Oct 21, 2012 ... 2
    Replies:
    26
    Views:
    21,262
    brian eiland
    Nov 14, 2023
  27. Forecaddie

    Scaled model how to calculate weight

    Forecaddie, Oct 29, 2023
    Replies:
    10
    Views:
    2,310
    gonzo
    Nov 9, 2023
  28. Manfred.pech

    Wingmaran

    Manfred.pech, Nov 6, 2023
    Replies:
    2
    Views:
    1,211
    Manfred.pech
    Nov 8, 2023
  29. Doug Lord

    50/50 Biplane Cat

    Doug Lord, Jul 5, 2012
    Replies:
    5
    Views:
    10,258
    brian eiland
    Nov 6, 2023
  30. power boater

    Duet launch

    power boater, Nov 4, 2023
    Replies:
    14
    Views:
    1,485
    power boater
    Nov 5, 2023
  31. bjn

    Self righting multihull?

    bjn, Feb 27, 2018 ... 5 6 7
    Replies:
    94
    Views:
    19,311
    ALL AT SEA
    Nov 3, 2023
  32. Tyler DeWitt

    How to assess bulkhead strength of completed boat

    Tyler DeWitt, Oct 27, 2023
    Replies:
    7
    Views:
    1,727
    gonzo
    Oct 30, 2023
  33. waterbear

    Gougeonified Chat 18 knockabout

    waterbear, Oct 27, 2023
    Replies:
    6
    Views:
    1,347
    kapnD
    Oct 28, 2023
  34. Forecaddie

    10 meter proa sail rig options

    Forecaddie, Oct 18, 2023
    Replies:
    10
    Views:
    2,561
    ALL AT SEA
    Oct 27, 2023
  35. TwoBirds

    Dipping lug on a proa?

    TwoBirds, Jan 13, 2018
    Replies:
    13
    Views:
    4,552
    Paul Scott
    Oct 22, 2023
  36. SV Pororoca

    How a proa works / I'm making a 45ft one in Aluminum

    SV Pororoca, Jan 8, 2020 ... 2
    Replies:
    29
    Views:
    9,114
    Ad Hoc
    Oct 19, 2023
  37. mrlonely

    Catamaran Strength Analysis

    mrlonely, Oct 10, 2023
    Replies:
    6
    Views:
    1,998
    Ad Hoc
    Oct 12, 2023
  38. Coastal Ogre

    Multihull Bulkhead Refit Advice

    Coastal Ogre, Mar 1, 2021 ... 2 3
    Replies:
    34
    Views:
    8,148
    brian eiland
    Oct 10, 2023
  39. voodoo child

    Demountable, 30+ to 40+foot Cat design?

    voodoo child, Feb 3, 2023
    Replies:
    13
    Views:
    3,867
    Christo
    Oct 9, 2023
  40. Matt Wiseman

    Normon Cross Trimarans

    Matt Wiseman, Oct 7, 2023
    Replies:
    4
    Views:
    1,561
    Matt Wiseman
    Oct 7, 2023
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