Multihulls

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

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  1. Muzammal

    Lack of data about steel multihulls

    Muzammal, May 18, 2021 ... 2 3 4
    Replies:
    46
    Views:
    15,448
    Sand crab
    Jan 27, 2022
  2. MichaelRoberts

    Epoxy water lock for wet exhaust

    MichaelRoberts, Jan 15, 2022 ... 2 3
    Replies:
    33
    Views:
    8,675
    MichaelRoberts
    Jan 27, 2022
  3. rob denney

    Foiler 50

    rob denney, Jan 21, 2022
    Replies:
    1
    Views:
    4,580
    lucdekeyser
    Jan 25, 2022
  4. Iridian

    Catamaran Transport Methods

    Iridian, Dec 19, 2021 ... 2
    Replies:
    25
    Views:
    7,496
    gonzo
    Jan 22, 2022
  5. peteyak

    Rudder mount design for small outrigger

    peteyak, Jan 11, 2022
    Replies:
    13
    Views:
    5,514
    revintage
    Jan 19, 2022
  6. Lachie

    Life is too short to fair above the waterline

    Lachie, Mar 19, 2021 ... 2 3 4
    Replies:
    49
    Views:
    15,447
    rael dobkins
    Jan 14, 2022
  7. PeculiarBob

    Mike Waller yacht design opinions?

    PeculiarBob, Dec 16, 2021 ... 2
    Replies:
    21
    Views:
    9,932
    jamez
    Jan 11, 2022
  8. Paul Scott

    Frankenboat questions

    Paul Scott, Jan 3, 2022
    Replies:
    0
    Views:
    4,833
    Paul Scott
    Jan 3, 2022
  9. sun

    Is there an estimation formula for calculating wave force of different marine structures？

    sun, Dec 27, 2021
    Replies:
    11
    Views:
    5,643
    jehardiman
    Jan 3, 2022
  10. Manfred.pech

    ...to smash all records

    Manfred.pech, Jan 1, 2022
    Replies:
    9
    Views:
    5,156
    jehardiman
    Jan 1, 2022
  11. guzzis3

    Sydney to Hobart multihulls

    guzzis3, Dec 27, 2021 ... 2
    Replies:
    18
    Views:
    7,865
    redreuben
    Jan 1, 2022
  12. Kuter

    Tri with central hull smaller than side hulls

    Kuter, Dec 23, 2021
    Replies:
    8
    Views:
    6,050
    rxcomposite
    Dec 24, 2021
  13. redreuben

    Vale James Wharram

    redreuben, Dec 18, 2021
    Replies:
    3
    Views:
    5,760
    jamez
    Dec 18, 2021
  14. Roni

    Resistance prediction methods/series for catamarans

    Roni, Jul 8, 2020 ... 2
    Replies:
    20
    Views:
    10,308
    Ad Hoc
    Dec 12, 2021
  15. DamianW86

    looking for spreaders reynolds 33 spar

    DamianW86, Dec 8, 2021
    Replies:
    1
    Views:
    5,297
    SolGato
    Dec 9, 2021
  16. rael dobkins

    ROUGH sea PROA Cruising, SHUNTING is the FUTURE... Balkan Shipyards

    rael dobkins, Nov 24, 2021
    Replies:
    8
    Views:
    7,005
    rael dobkins
    Dec 8, 2021
  17. ChrisVJ

    Pre bent masts

    ChrisVJ, Nov 29, 2021
    Replies:
    13
    Views:
    6,415
    Blueknarr
    Dec 6, 2021
  18. Manfred.pech

    French Trimaran

    Manfred.pech, Nov 25, 2021
    Replies:
    5
    Views:
    6,396
    redreuben
    Nov 26, 2021
  19. Dolfiman

    Ultims are back in 2021

    Dolfiman, May 7, 2021 ... 2
    Replies:
    26
    Views:
    12,069
    Dolfiman
    Nov 24, 2021
  20. jmoropeza

    Newbie asking for advice

    jmoropeza, Oct 17, 2021 ... 2 3 4
    Replies:
    53
    Views:
    16,014
    jmoropeza
    Nov 7, 2021
  21. rturbett

    Breathability

    rturbett, Oct 13, 2021
    Replies:
    13
    Views:
    34,589
    rturbett
    Nov 1, 2021
  22. guzzis3

    L shaped centerboards

    guzzis3, Oct 24, 2021
    Replies:
    7
    Views:
    6,168
    upchurchmr
    Oct 26, 2021
  23. guzzis3

    4hp outboard

    guzzis3, Apr 25, 2021 ... 2
    Replies:
    25
    Views:
    10,665
    trip the light fandango
    Oct 26, 2021
  24. Stumble

    Design thoughts?

    Stumble, Oct 19, 2021 ... 2
    Replies:
    20
    Views:
    12,594
    rob denney
    Oct 23, 2021
  25. guzzis3

    Crowther spindrift 48

    guzzis3, Oct 1, 2021 ... 2
    Replies:
    16
    Views:
    10,529
    upchurchmr
    Oct 12, 2021
  26. flagg

    Bob Oram website - something looks awfully wrong here??

    flagg, Oct 9, 2021
    Replies:
    1
    Views:
    10,571
    Mr Efficiency
    Oct 9, 2021
  27. rturbett

    Catamaran beam construction

    rturbett, Jul 11, 2021 ... 2
    Replies:
    21
    Views:
    10,792
    rturbett
    Oct 1, 2021
  28. rael dobkins

    Preparing for sea, Proa physics and a new rudder. Balkan Shipyards

    rael dobkins, Sep 30, 2021
    Replies:
    0
    Views:
    6,904
    rael dobkins
    Sep 30, 2021
  29. Hell_Bent

    In Search of Epicure (design commentary is also welcome)

    Hell_Bent, Sep 22, 2021
    Replies:
    7
    Views:
    7,168
    Hell_Bent
    Sep 29, 2021
  30. Amphicat

    Help me design the AmphiCat

    Amphicat, Sep 16, 2021 ... 2 3
    Replies:
    37
    Views:
    9,382
    Amphicat
    Sep 20, 2021
  31. Robert A Walker

    Tri, Tri, Tri

    Robert A Walker, Sep 14, 2021
    Replies:
    2
    Views:
    6,100
    catsketcher
    Sep 14, 2021
  32. jtrosclair

    12 foot trimaran, can someone tell me if this center hull looks about right?

    jtrosclair, Sep 9, 2021
    Replies:
    9
    Views:
    6,389
    guzzis3
    Sep 10, 2021
  33. guzzis3

    Glider/L'il Nip weight

    guzzis3, Aug 30, 2021
    Replies:
    10
    Views:
    5,339
    guzzis3
    Sep 9, 2021
  34. CardboardKing

    Hobie Cat Lateen Conversion

    CardboardKing, Sep 2, 2021
    Replies:
    11
    Views:
    6,746
    CardboardKing
    Sep 8, 2021
  35. rael dobkins

    The next PROA from Balkan Shipyards, the LOGIC behind the DESIGN.

    rael dobkins, Aug 28, 2021
    Replies:
    1
    Views:
    5,259
    redreuben
    Aug 31, 2021
  36. nezih ahmet

    Ply Catamaran

    nezih ahmet, Mar 24, 2010
    Replies:
    9
    Views:
    10,180
    guzzis3
    Aug 25, 2021
  37. terhohalme

    How to dimension a sailing catamaran?

    terhohalme, Apr 27, 2008 ... 4 5 6
    Replies:
    83
    Views:
    54,623
    Andre Holanda
    Aug 18, 2021
  38. bruceb

    Modern sheet material designs

    bruceb, Aug 6, 2021 ... 2
    Replies:
    28
    Views:
    7,101
    bruceb
    Aug 12, 2021
  39. Iridian

    Cruising Catamaran Righting System

    Iridian, Aug 3, 2021
    Replies:
    4
    Views:
    4,997
    redreuben
    Aug 5, 2021
  40. Scuff

    Self tacking jib options

    Scuff, Jul 13, 2021 ... 2
    Replies:
    17
    Views:
    6,650
    Blueknarr
    Jul 31, 2021
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