Multihulls

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

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  1. Amphicat

    Help me design the AmphiCat

    Amphicat, Sep 16, 2021 ... 2 3
    Replies:
    37
    Views:
    9,297
    Amphicat
    Sep 20, 2021
  2. Hell_Bent

    In Search of Epicure (design commentary is also welcome)

    Hell_Bent, Sep 22, 2021
    Replies:
    7
    Views:
    7,136
    Hell_Bent
    Sep 29, 2021
  3. rael dobkins

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

    rael dobkins, Sep 30, 2021
    Replies:
    0
    Views:
    6,873
    rael dobkins
    Sep 30, 2021
  4. rturbett

    Catamaran beam construction

    rturbett, Jul 11, 2021 ... 2
    Replies:
    21
    Views:
    10,740
    rturbett
    Oct 1, 2021
  5. flagg

    Bob Oram website - something looks awfully wrong here??

    flagg, Oct 9, 2021
    Replies:
    1
    Views:
    10,504
    Mr Efficiency
    Oct 9, 2021
  6. guzzis3

    Crowther spindrift 48

    guzzis3, Oct 1, 2021 ... 2
    Replies:
    16
    Views:
    10,486
    upchurchmr
    Oct 12, 2021
  7. Stumble

    Design thoughts?

    Stumble, Oct 19, 2021 ... 2
    Replies:
    20
    Views:
    12,525
    rob denney
    Oct 23, 2021
  8. guzzis3

    4hp outboard

    guzzis3, Apr 25, 2021 ... 2
    Replies:
    25
    Views:
    10,605
    trip the light fandango
    Oct 26, 2021
  9. guzzis3

    L shaped centerboards

    guzzis3, Oct 24, 2021
    Replies:
    7
    Views:
    6,146
    upchurchmr
    Oct 26, 2021
  10. rturbett

    Breathability

    rturbett, Oct 13, 2021
    Replies:
    13
    Views:
    34,560
    rturbett
    Nov 1, 2021
  11. jmoropeza

    Newbie asking for advice

    jmoropeza, Oct 17, 2021 ... 2 3 4
    Replies:
    53
    Views:
    15,881
    jmoropeza
    Nov 7, 2021
  12. Dolfiman

    Ultims are back in 2021

    Dolfiman, May 7, 2021 ... 2
    Replies:
    26
    Views:
    12,027
    Dolfiman
    Nov 24, 2021
  13. Manfred.pech

    French Trimaran

    Manfred.pech, Nov 25, 2021
    Replies:
    5
    Views:
    6,376
    redreuben
    Nov 26, 2021
  14. ChrisVJ

    Pre bent masts

    ChrisVJ, Nov 29, 2021
    Replies:
    13
    Views:
    6,377
    Blueknarr
    Dec 6, 2021
  15. rael dobkins

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

    rael dobkins, Nov 24, 2021
    Replies:
    8
    Views:
    6,960
    rael dobkins
    Dec 8, 2021
  16. DamianW86

    looking for spreaders reynolds 33 spar

    DamianW86, Dec 8, 2021
    Replies:
    1
    Views:
    5,265
    SolGato
    Dec 9, 2021
  17. Roni

    Resistance prediction methods/series for catamarans

    Roni, Jul 8, 2020 ... 2
    Replies:
    20
    Views:
    10,214
    Ad Hoc
    Dec 12, 2021
  18. redreuben

    Vale James Wharram

    redreuben, Dec 18, 2021
    Replies:
    3
    Views:
    5,741
    jamez
    Dec 18, 2021
  19. Kuter

    Tri with central hull smaller than side hulls

    Kuter, Dec 23, 2021
    Replies:
    8
    Views:
    6,028
    rxcomposite
    Dec 24, 2021
  20. guzzis3

    Sydney to Hobart multihulls

    guzzis3, Dec 27, 2021 ... 2
    Replies:
    18
    Views:
    7,790
    redreuben
    Jan 1, 2022
  21. Manfred.pech

    ...to smash all records

    Manfred.pech, Jan 1, 2022
    Replies:
    9
    Views:
    5,131
    jehardiman
    Jan 1, 2022
  22. sun

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

    sun, Dec 27, 2021
    Replies:
    11
    Views:
    5,608
    jehardiman
    Jan 3, 2022
  23. Paul Scott

    Frankenboat questions

    Paul Scott, Jan 3, 2022
    Replies:
    0
    Views:
    4,797
    Paul Scott
    Jan 3, 2022
  24. PeculiarBob

    Mike Waller yacht design opinions?

    PeculiarBob, Dec 16, 2021 ... 2
    Replies:
    21
    Views:
    9,823
    jamez
    Jan 11, 2022
  25. Lachie

    Life is too short to fair above the waterline

    Lachie, Mar 19, 2021 ... 2 3 4
    Replies:
    49
    Views:
    15,299
    rael dobkins
    Jan 14, 2022
  26. peteyak

    Rudder mount design for small outrigger

    peteyak, Jan 11, 2022
    Replies:
    13
    Views:
    5,477
    revintage
    Jan 19, 2022
  27. Iridian

    Catamaran Transport Methods

    Iridian, Dec 19, 2021 ... 2
    Replies:
    25
    Views:
    7,451
    gonzo
    Jan 22, 2022
  28. rob denney

    Foiler 50

    rob denney, Jan 21, 2022
    Replies:
    1
    Views:
    4,561
    lucdekeyser
    Jan 25, 2022
  29. MichaelRoberts

    Epoxy water lock for wet exhaust

    MichaelRoberts, Jan 15, 2022 ... 2 3
    Replies:
    33
    Views:
    8,516
    MichaelRoberts
    Jan 27, 2022
  30. Muzammal

    Lack of data about steel multihulls

    Muzammal, May 18, 2021 ... 2 3 4
    Replies:
    46
    Views:
    15,287
    Sand crab
    Jan 27, 2022
  31. revintage

    Windknife trifoiler build

    revintage, Dec 7, 2018 ... 2 3 4
    Replies:
    48
    Views:
    14,595
    revintage
    Jan 29, 2022
  32. Corley

    Lock Crowther 1962 Kraken 25 trimaran build and rebuild log

    Corley, Jun 7, 2011 ... 12 13 14
    Replies:
    203
    Views:
    55,136
    revintage
    Feb 1, 2022
  33. rturbett

    Deconstructive testing!

    rturbett, Jan 31, 2022
    Replies:
    5
    Views:
    4,195
    rturbett
    Feb 1, 2022
  34. Philippe Lapere

    Advice on 20ft beachcat design and build

    Philippe Lapere, Apr 29, 2021 ... 2 3 4
    Replies:
    52
    Views:
    19,109
    Windward 54
    Feb 5, 2022
  35. rturbett

    First try at making a Shark mould!

    rturbett, Jan 31, 2022
    Replies:
    3
    Views:
    4,298
    rturbett
    Feb 10, 2022
  36. perry2222

    Dagger board control lines

    perry2222, Feb 12, 2022
    Replies:
    2
    Views:
    3,997
    perry2222
    Feb 13, 2022
  37. Scuff

    Kickup rudder critique

    Scuff, Nov 8, 2021 ... 2 3
    Replies:
    31
    Views:
    9,714
    freddyj
    Feb 14, 2022
  38. Geno41

    Cat Design comparo question

    Geno41, Jul 28, 2017 ... 2
    Replies:
    25
    Views:
    11,197
    supervisit
    Feb 21, 2022
  39. terryI

    1977 26' simpson-wild trimaran

    terryI, Jan 7, 2008 ... 2 3 4
    Replies:
    46
    Views:
    32,523
    David Walsh
    Feb 22, 2022
  40. revintage

    Single water stay attachment for both beams

    revintage, Feb 22, 2022
    Replies:
    0
    Views:
    3,607
    revintage
    Feb 22, 2022
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Page 78 of 83