Multihulls

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

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  1. oldmulti

    Multihull Structure Thoughts

    oldmulti, May 27, 2019 ... 315 316 317
    Replies:
    4,747
    Views:
    1,471,830
    oldmulti
    Dec 7, 2025 at 1:03 AM
  2. lucdekeyser

    80 foot cargo harryproa

    lucdekeyser, Nov 15, 2020 ... 10 11 12
    Replies:
    179
    Views:
    59,292
    rob denney
    Dec 6, 2025 at 7:41 PM
  3. yabert

    45' solar catamaran

    yabert, Nov 25, 2024 ... 11 12 13
    Replies:
    193
    Views:
    17,997
    fallguy
    Dec 3, 2025 at 11:31 PM
  4. BGW

    Wharram and webbing beam straps

    BGW, Aug 24, 2025 ... 3 4 5
    Replies:
    73
    Views:
    5,328
    Waterwitch
    Dec 2, 2025 at 8:16 AM
  5. Coyote Boats

    8m demountable cat design - feedback wanted

    Coyote Boats, Nov 22, 2025
    Replies:
    5
    Views:
    458
    rberrey
    Dec 1, 2025 at 1:53 PM
  6. John Bjorklund

    Wa'apa Outrigger Sailing Canoe Build

    John Bjorklund, Nov 11, 2025 ... 2
    Replies:
    24
    Views:
    1,006
    John Bjorklund
    Nov 27, 2025
  7. Michael78

    Farrier F32A - looking for Plans

    Michael78, Apr 26, 2023 ... 2
    Replies:
    16
    Views:
    7,342
    Quadcat
    Nov 18, 2025
  8. Gary Baigent

    Historical multihulls

    Gary Baigent, Feb 26, 2012 ... 89 90 91
    Replies:
    1,356
    Views:
    492,248
    brian eiland
    Nov 17, 2025
  9. Scuff

    Argonauta stress fracture triage

    Scuff, Nov 13, 2025
    Replies:
    7
    Views:
    359
    Rumars
    Nov 14, 2025
  10. Doug Lord

    Eagle Class 53 Catamaran Foiler

    Doug Lord, Jul 26, 2018
    Replies:
    9
    Views:
    5,356
    brian eiland
    Nov 5, 2025
  11. Robert Biegler

    Patin a Vela or Patín Catalán

    Robert Biegler, Nov 3, 2025
    Replies:
    4
    Views:
    473
    Robert Biegler
    Nov 4, 2025
  12. Davodinkum

    1968 H Nicol 35' Wanderer (longfloat)

    Davodinkum, Oct 9, 2025
    Replies:
    7
    Views:
    506
    cavalier mk2
    Oct 16, 2025
  13. Wrekin

    Stretching a trimaran

    Wrekin, Oct 4, 2025
    Replies:
    3
    Views:
    515
    peterbike
    Oct 6, 2025
  14. montero

    Water World Orma60

    montero, Oct 5, 2025
    Replies:
    0
    Views:
    371
    montero
    Oct 5, 2025
  15. Scuff

    Robert Harris Eclipse

    Scuff, Oct 1, 2025
    Replies:
    2
    Views:
    439
    Scuff
    Oct 3, 2025
  16. rapscallion

    Gougeon 32 catamaran

    rapscallion, Jul 11, 2011 ... 2 3
    Replies:
    44
    Views:
    21,563
    BlueBell
    Sep 12, 2025
  17. skier

    Moana Outrigger Sailing Canoe

    skier, Jun 26, 2025
    Replies:
    14
    Views:
    2,092
    Igor
    Sep 7, 2025
  18. John Bjorklund

    Sail advice for Wa'apa outrigger sailing canoe

    John Bjorklund, Sep 2, 2025
    Replies:
    13
    Views:
    2,291
    waterbear
    Sep 7, 2025
  19. TrimaranMan

    My Trimaran and catamaran website

    TrimaranMan, Jun 3, 2025
    Replies:
    2
    Views:
    1,330
    TrimaranMan
    Aug 20, 2025
  20. John Bjorklund

    Outrigger made with polypropylene foam roller

    John Bjorklund, Aug 18, 2025
    Replies:
    3
    Views:
    882
    ondarvr
    Aug 19, 2025
  21. John Bjorklund

    Wa'apa fiberglass question

    John Bjorklund, Aug 12, 2025
    Replies:
    13
    Views:
    1,104
    Kurtz
    Aug 18, 2025
  22. Iridian

    Hobie 20 Electric Motor Sizing

    Iridian, Aug 10, 2025
    Replies:
    10
    Views:
    983
    SolGato
    Aug 12, 2025
  23. Iridian

    Considering Homebuilding a ~50' Catamaran

    Iridian, Jun 10, 2021 ... 3 4 5
    Replies:
    74
    Views:
    21,991
    waterbear
    Aug 12, 2025
  24. sailingsunstar2

    recognize this multihull?

    sailingsunstar2, Jun 9, 2024
    Replies:
    14
    Views:
    3,165
    kdifzero
    Aug 9, 2025
  25. Juno7

    Scaling a Jarcat up by 4 percent?

    Juno7, Aug 7, 2025 ... 2
    Replies:
    20
    Views:
    1,543
    gonzo
    Aug 8, 2025
  26. Brian Fanner

    Flyfishing kick boat cat

    Brian Fanner, Jul 6, 2020 ... 2 3
    Replies:
    32
    Views:
    6,676
    portacruise
    Aug 5, 2025
  27. Jagarwal

    Catamaran crossbeam design

    Jagarwal, Oct 9, 2024
    Replies:
    6
    Views:
    2,478
    Jagarwal
    Aug 3, 2025
  28. bolero105

    Cutting portlights into topsides

    bolero105, Jun 9, 2023 ... 2
    Replies:
    16
    Views:
    3,995
    bolero105
    Aug 3, 2025
  29. Boardmanlake

    Catamaran identification

    Boardmanlake, Aug 2, 2025
    Replies:
    3
    Views:
    567
    oldmulti
    Aug 3, 2025
  30. magwas

    Multihull microcruiser design (capsize approach, vol 2)

    magwas, Feb 5, 2025 ... 2 3
    Replies:
    36
    Views:
    5,012
    gonzo
    Jul 26, 2025
  31. Stenn

    Kelsall SunCat 36 hull design plans ?

    Stenn, Jul 6, 2025
    Replies:
    2
    Views:
    826
    tane
    Jul 19, 2025
  32. Jardel de Olivenbaun

    Model from a study plan

    Jardel de Olivenbaun, Jun 19, 2025 ... 2
    Replies:
    24
    Views:
    2,486
    Jardel de Olivenbaun
    Jul 17, 2025
  33. MichaelRoberts

    Connecting Dyneema shrouds to rotating mast

    MichaelRoberts, Jul 10, 2025
    Replies:
    3
    Views:
    777
    gonzo
    Jul 11, 2025
  34. skier

    Gary Dierking Outrigger Canoes

    skier, Jun 28, 2025
    Replies:
    13
    Views:
    1,992
    fallguy
    Jul 3, 2025
  35. MichaelRoberts

    Forestay design

    MichaelRoberts, Jun 22, 2024
    Replies:
    5
    Views:
    1,729
    MichaelRoberts
    Jul 3, 2025
  36. Mulkari

    Designing a fast open deck catamaran

    Mulkari, Nov 26, 2024 ... 9 10 11
    Replies:
    156
    Views:
    24,315
    cando2
    Jun 16, 2025
  37. Mads Prag Roesen

    Balance of a trimaran: NEEL 51

    Mads Prag Roesen, May 12, 2025
    Replies:
    12
    Views:
    1,778
    CarlosK2
    Jun 10, 2025
  38. MichaelRoberts

    Chinese electric winch?

    MichaelRoberts, Apr 22, 2024
    Replies:
    6
    Views:
    2,592
    starcmr
    Jun 10, 2025
  39. revintage

    Small trimaran with Tornado/Nacra 5.8 center hull

    revintage, Dec 25, 2021 ... 3 4 5
    Replies:
    64
    Views:
    22,696
    patzefran
    May 28, 2025
  40. etoimene

    KHSD demountable 27 or 30 ft catamaran

    etoimene, May 25, 2025
    Replies:
    12
    Views:
    1,452
    etoimene
    May 27, 2025
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