Multihulls

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

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  1. skier

    Gary Dierking Outrigger Canoes

    skier, Jun 28, 2025 at 7:03 AM
    Replies:
    6
    Views:
    238
    Igor
    Jun 29, 2025 at 8:34 AM
  2. skier

    Moana Outrigger Sailing Canoe

    skier, Jun 26, 2025 at 8:00 AM
    Replies:
    8
    Views:
    343
    Igor
    Jun 27, 2025 at 3:09 PM
  3. Jardel de Olivenbaun

    Model from a study plan

    Jardel de Olivenbaun, Jun 19, 2025 ... 2
    Replies:
    23
    Views:
    916
    waterbear
    Jun 28, 2025 at 3:13 AM
  4. TrimaranMan

    My Trimaran and catamaran website

    TrimaranMan, Jun 3, 2025
    Replies:
    0
    Views:
    384
    TrimaranMan
    Jun 3, 2025
  5. etoimene

    KHSD demountable 27 or 30 ft catamaran

    etoimene, May 25, 2025
    Replies:
    12
    Views:
    677
    etoimene
    May 27, 2025
  6. Dolfiman

    Ultim at full speed on rough sea

    Dolfiman, May 14, 2025
    Replies:
    3
    Views:
    624
    redreuben
    May 25, 2025
  7. Mads Prag Roesen

    Balance of a trimaran: NEEL 51

    Mads Prag Roesen, May 12, 2025
    Replies:
    12
    Views:
    820
    CarlosK2
    Jun 10, 2025
  8. Paul Scott

    Has there been any discussion of this?

    Paul Scott, Apr 23, 2025
    Replies:
    4
    Views:
    749
    jehardiman
    Apr 25, 2025
  9. Kurtz

    Adjustable float dihedral

    Kurtz, Apr 23, 2025
    Replies:
    14
    Views:
    936
    Kurtz
    Apr 30, 2025
  10. Kurtz

    Stress (stiffness) testing a small tri hull

    Kurtz, Apr 10, 2025 ... 2
    Replies:
    17
    Views:
    1,732
    Kurtz
    Apr 19, 2025
  11. fallguy

    River anchoring for a catamaran

    fallguy, Mar 31, 2025 ... 2
    Replies:
    24
    Views:
    1,485
    Will Gilmore
    Apr 5, 2025
  12. Keith Wilkins

    Leaking Centerboard Pivot bolt

    Keith Wilkins, Mar 31, 2025
    Replies:
    6
    Views:
    781
    cando2
    Apr 11, 2025
  13. Daniel Reilly

    Russian Proa in Massachusetts Circa 2019

    Daniel Reilly, Mar 29, 2025
    Replies:
    4
    Views:
    664
    comfisherman
    Mar 30, 2025
  14. Duane Lutes

    Crowther Kraken 33 - Crossbeams

    Duane Lutes, Mar 28, 2025
    Replies:
    5
    Views:
    648
    peterbike
    Mar 30, 2025
  15. NIKOLAT

    Pontoon Boat Waterline

    NIKOLAT, Mar 19, 2025
    Replies:
    3
    Views:
    537
    gonzo
    Mar 20, 2025
  16. Ausnp

    Multihull Lightweight Structure

    Ausnp, Mar 13, 2025
    Replies:
    11
    Views:
    1,137
    bajansailor
    Mar 14, 2025
  17. Le_skipper

    1985 catamaran

    Le_skipper, Mar 5, 2025
    Replies:
    7
    Views:
    848
    bajansailor
    Mar 9, 2025
  18. MorrisCode

    Adding horizontal bulkhead to beach cat

    MorrisCode, Mar 2, 2025
    Replies:
    6
    Views:
    652
    Skip Johnson
    Mar 4, 2025
  19. rael dobkins

    Caught aback is a huge problem on Shunters, Junk Rigs solve that well!

    rael dobkins, Feb 22, 2025
    Replies:
    0
    Views:
    755
    rael dobkins
    Feb 22, 2025
  20. SHIVANK

    Composite Catamaran Analysis

    SHIVANK, Feb 18, 2025
    Replies:
    0
    Views:
    767
    SHIVANK
    Feb 18, 2025
  21. Wrekin

    Dry Strip Planking

    Wrekin, Feb 16, 2025 ... 3 4 5
    Replies:
    65
    Views:
    4,897
    i_mac
    Mar 4, 2025
  22. rael dobkins

    The Full Story of a Balkan Proa, the Zen of Spartan Philosophy...

    rael dobkins, Feb 14, 2025
    Replies:
    0
    Views:
    636
    rael dobkins
    Feb 14, 2025
  23. magwas

    Multihull microcruiser design (capsize approach, vol 2)

    magwas, Feb 5, 2025 ... 2
    Replies:
    27
    Views:
    2,913
    montero
    May 25, 2025
  24. magwas

    Multihull microcruiser design considerations (capsize survival)

    magwas, Jan 5, 2025 ... 2 3
    Replies:
    33
    Views:
    3,411
    montero
    Feb 16, 2025
  25. Coyote Boats

    Demountable 25-30' catamarans - any used boats out there?

    Coyote Boats, Jan 4, 2025
    Replies:
    2
    Views:
    1,134
    WarrenM
    Apr 8, 2025
  26. rael dobkins

    Proa, Fast Downwind Surfing, ZERO Weather Helm.

    rael dobkins, Dec 31, 2024
    Replies:
    2
    Views:
    867
    rael dobkins
    Jan 9, 2025
  27. ChronoFish

    Kayak to Trimaran Conversion

    ChronoFish, Dec 15, 2024
    Replies:
    5
    Views:
    1,077
    ChronoFish
    Dec 16, 2024
  28. Mulkari

    Designing a fast open deck catamaran

    Mulkari, Nov 26, 2024 ... 9 10 11
    Replies:
    156
    Views:
    17,242
    cando2
    Jun 16, 2025
  29. yabert

    45' solar catamaran

    yabert, Nov 25, 2024 ... 6 7 8
    Replies:
    116
    Views:
    9,173
    SolGato
    May 29, 2025
  30. SMA

    KD 650

    SMA, Nov 24, 2024
    Replies:
    2
    Views:
    1,123
    jamez
    Dec 3, 2024
  31. rael dobkins

    Inside out short Vid, of a Balkan Proa, cruising along....

    rael dobkins, Nov 7, 2024
    Replies:
    0
    Views:
    757
    rael dobkins
    Nov 7, 2024
  32. James Wellington

    Multi vs monohulls in Beaufort 12

    James Wellington, Nov 4, 2024
    Replies:
    14
    Views:
    2,021
    montero
    Dec 10, 2024
  33. rael dobkins

    Crab Claws can hang off anything, even just 3 ropes...

    rael dobkins, Oct 18, 2024
    Replies:
    0
    Views:
    863
    rael dobkins
    Oct 18, 2024
  34. rob denney

    Building a Harryproa C50 in Fiji

    rob denney, Oct 17, 2024
    Replies:
    3
    Views:
    1,363
    rob denney
    Oct 19, 2024
  35. Mulkari

    High end vs low end cruising catamaran

    Mulkari, Oct 17, 2024 ... 2 3
    Replies:
    36
    Views:
    4,784
    gonzo
    Nov 1, 2024
  36. Coyote Boats

    Help identifying this 30-ish foot catamaran

    Coyote Boats, Oct 12, 2024
    Replies:
    2
    Views:
    963
    Coyote Boats
    Oct 16, 2024
  37. Jagarwal

    Catamaran crossbeam design

    Jagarwal, Oct 9, 2024
    Replies:
    5
    Views:
    1,630
    gonzo
    Nov 3, 2024
  38. lucdekeyser

    flat vs convex surfaces

    lucdekeyser, Oct 4, 2024 ... 7 8 9
    Replies:
    133
    Views:
    10,496
    lucdekeyser
    Nov 6, 2024
  39. pdeinc

    Shipping options for a 45' mast

    pdeinc, Oct 4, 2024
    Replies:
    9
    Views:
    1,220
    Russell Brown
    Oct 5, 2024
  40. kekdu

    Looking for a Low-Cost Easy to build multihull sailing design

    kekdu, Sep 27, 2024 ... 2
    Replies:
    19
    Views:
    4,173
    tane
    Nov 7, 2024
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