Multihulls

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

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  1. waynemarlow

    Gaff rig question.

    waynemarlow, Feb 23, 2021
    Replies:
    6
    Views:
    420
    Richard Woods
    Feb 27, 2021
  2. terryI

    1977 26' simpson-wild trimaran

    terryI, Jan 7, 2008 ... 2 3
    Replies:
    44
    Views:
    23,354
    DAVID B CLANTON
    Feb 27, 2021
  3. Beezer

    Coast guard certified Catamaran

    Beezer, Jan 2, 2021
    Replies:
    12
    Views:
    917
    fallguy
    Feb 25, 2021
  4. Burnside Style

    Eco 520 aft mast rig

    Burnside Style, Feb 20, 2021
    Replies:
    1
    Views:
    449
    jamez
    Feb 23, 2021
  5. JohnGB

    Modern hull shape vs ideal hydrofoil shape

    JohnGB, Feb 19, 2021 ... 2
    Replies:
    26
    Views:
    1,087
    Mr Efficiency
    Feb 21, 2021
  6. Gary Bernier

    52' CSK Catamaran

    Gary Bernier, Dec 14, 2020
    Replies:
    3
    Views:
    824
    shawn morgan
    Feb 10, 2021
  7. MichaelRoberts

    How to connect catamaran rudders

    MichaelRoberts, Dec 29, 2020
    Replies:
    13
    Views:
    1,112
    tspeer
    Feb 6, 2021
  8. Herman Miller

    Simpson Slipstream 15 - Opinions?

    Herman Miller, May 6, 2020
    Replies:
    9
    Views:
    1,324
    Andy Muller
    Feb 2, 2021
  9. philSweet

    Sodebo and Gitana 17 set off on Jules Verne Record attempt

    philSweet, Nov 26, 2020 ... 2 3
    Replies:
    30
    Views:
    2,033
    Doug Lord
    Jan 29, 2021
  10. trip the light fandango

    building new amas/floats from recycled beachcat hulls

    trip the light fandango, Apr 23, 2019 ... 5 6 7
    Replies:
    96
    Views:
    8,219
    trip the light fandango
    Jan 29, 2021
  11. MichaelRoberts

    Gooseneck on wing mast

    MichaelRoberts, Jan 25, 2021 ... 2
    Replies:
    18
    Views:
    892
    catsketcher
    Jan 28, 2021
  12. guzzis3

    Modern hirondelle

    guzzis3, Nov 18, 2016 ... 8 9 10
    Replies:
    147
    Views:
    31,888
    guzzis3
    Jan 26, 2021
  13. Corley

    Tremolino tales

    Corley, Aug 24, 2017 ... 2 3
    Replies:
    34
    Views:
    6,482
    Russell Brown
    Jan 18, 2021
  14. Doug Lord

    Small trimarans under 20'

    Doug Lord, Jun 24, 2012 ... 74 75 76
    Replies:
    1,128
    Views:
    261,454
    Tiny Turnip
    Jan 9, 2021
  15. Lucainbarca

    Rival 21 from batavento sailmakers brazil

    Lucainbarca, Apr 20, 2019 ... 2
    Replies:
    21
    Views:
    2,342
    Lucainbarca
    Jan 5, 2021
  16. Boatguy30

    Catamaran Single Engine One Hull

    Boatguy30, Jul 20, 2012 ... 2 3
    Replies:
    43
    Views:
    16,888
    Stefan Gessinger
    Jan 3, 2021
  17. onekiwi

    Restoring 1967 B-LION catamaran

    onekiwi, Feb 1, 2015 ... 2
    Replies:
    29
    Views:
    5,205
    Gopherit10
    Jan 3, 2021
  18. redreuben

    Race Navigation

    redreuben, Jan 2, 2021
    Replies:
    1
    Views:
    260
    boatgm2
    Jan 3, 2021
  19. Swift

    Best motor system for a racing tri?

    Swift, Jan 2, 2021
    Replies:
    4
    Views:
    425
    Swift
    Jan 3, 2021
  20. P Flados

    Small Tri Test Platform

    P Flados, Sep 30, 2014 ... 3 4 5
    Replies:
    68
    Views:
    11,850
    Samuel Langhorn
    Jan 2, 2021
  21. MichaelRoberts

    Carbon wing mast for Archimedes 60

    MichaelRoberts, Dec 19, 2020
    Replies:
    5
    Views:
    764
    MichaelRoberts
    Dec 30, 2020
  22. peterAustralia

    two engines on centerline, Filipino Banca

    peterAustralia, Dec 27, 2020
    Replies:
    8
    Views:
    580
    fallguy
    Dec 28, 2020
  23. Matthias S.

    Newbie question: would this trimaran folding system work? (parallel hinge)

    Matthias S., Sep 25, 2020
    Replies:
    11
    Views:
    1,213
    kleppar
    Dec 28, 2020
  24. GUSRENTIT

    Need Cat advice

    GUSRENTIT, Dec 20, 2020 ... 2
    Replies:
    23
    Views:
    1,084
    GUSRENTIT
    Dec 22, 2020
  25. nwguy

    Home built foiling tri

    nwguy, Dec 21, 2020
    Replies:
    2
    Views:
    480
    nwguy
    Dec 21, 2020
  26. SPC

    Gemini 105M and PDQ 36 -- Same Displacement?

    SPC, Dec 19, 2020
    Replies:
    6
    Views:
    323
    SPC
    Dec 19, 2020
  27. MichaelRoberts

    How to fill carbon dagger boards with foam

    MichaelRoberts, Dec 8, 2020
    Replies:
    13
    Views:
    836
    Eric ruttan
    Dec 19, 2020
  28. Infinitus

    Extendable hull

    Infinitus, Dec 7, 2020
    Replies:
    7
    Views:
    637
    gonzo
    Dec 19, 2020
  29. SmokeyBear

    "Small" design changes

    SmokeyBear, Dec 14, 2020
    Replies:
    13
    Views:
    707
    redreuben
    Dec 18, 2020
  30. Gary Baigent

    Law abiding Kiwis.

    Gary Baigent, Mar 31, 2020 ... 2 3 4
    Replies:
    56
    Views:
    5,252
    fallguy
    Dec 17, 2020
  31. JCaprani

    Ontong Java II by Hans Klaar

    JCaprani, May 3, 2012 ... 2 3
    Replies:
    40
    Views:
    15,093
    peterAustralia
    Dec 17, 2020
  32. FantasyTrimaran

    A few trimaran design questions

    FantasyTrimaran, Dec 20, 2019
    Replies:
    8
    Views:
    1,821
    W17 designer
    Dec 14, 2020
  33. tom ybarrola

    24' Buccaneer Trimaran

    tom ybarrola, Apr 23, 2012 ... 2
    Replies:
    22
    Views:
    5,768
    bruceb
    Dec 8, 2020
  34. oldsailor7

    Hedley Nicol Trimaran Plans

    oldsailor7, Mar 12, 2010 ... 30 31 32
    Replies:
    476
    Views:
    118,160
    cavalier mk2
    Dec 8, 2020
  35. magwas

    Cracks on FP Athena

    magwas, Dec 4, 2020
    Replies:
    5
    Views:
    440
    bajansailor
    Dec 6, 2020
  36. SV Pororoca

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

    SV Pororoca, Jan 8, 2020 ... 2
    Replies:
    16
    Views:
    2,487
    gonzo
    Dec 6, 2020
  37. BobBill

    Shear-web ?

    BobBill, Feb 28, 2020 ... 2 3
    Replies:
    34
    Views:
    1,631
    BobBill
    Nov 30, 2020
  38. rael dobkins

    Default New Workshop, new Proa, new thoughts, Balkan Shipyards

    rael dobkins, Nov 30, 2020
    Replies:
    0
    Views:
    377
    rael dobkins
    Nov 30, 2020
  39. Le_skipper

    Bob Harris trimaran

    Le_skipper, Nov 28, 2020
    Replies:
    0
    Views:
    561
    Le_skipper
    Nov 28, 2020
  40. Catbuild

    Help Choosing Kit for Cat @ 43

    Catbuild, Nov 9, 2020 ... 2
    Replies:
    15
    Views:
    1,011
    Steve W
    Nov 28, 2020
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