Multihulls

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

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  1. perry2222

    Norewegian Multi hull designers

    perry2222, Mar 20, 2022
    Replies:
    11
    Views:
    4,619
    redreuben
    May 14, 2022
  2. Burnside Style

    Plywood Tornado US21 Hull Repair

    Burnside Style, May 1, 2022
    Replies:
    5
    Views:
    3,662
    Burnside Style
    May 4, 2022
  3. East Coast Sailor

    Easton Catamarans

    East Coast Sailor, May 4, 2022
    Replies:
    0
    Views:
    3,470
    East Coast Sailor
    May 4, 2022
  4. MichaelRoberts

    Laminate or dacron for 60 foot catamaran

    MichaelRoberts, Mar 4, 2022 ... 2
    Replies:
    17
    Views:
    6,303
    Skyak
    Apr 21, 2022
  5. SeaBoat

    Block coefficient of Multihull

    SeaBoat, Apr 11, 2022
    Replies:
    1
    Views:
    4,120
    jehardiman
    Apr 11, 2022
  6. DamianW86

    Building 17' wide 14' long deck

    DamianW86, Jan 7, 2022 ... 2
    Replies:
    17
    Views:
    6,687
    redreuben
    Apr 10, 2022
  7. Jerry_Lincoln

    Norman Cross Trimaran

    Jerry_Lincoln, Mar 26, 2005 ... 6 7 8
    Replies:
    114
    Views:
    113,653
    Briter
    Apr 6, 2022
  8. rael dobkins

    Proa Self Steering? AD-Scull? Sheet to Tiller? Lets see...

    rael dobkins, Apr 2, 2022
    Replies:
    2
    Views:
    4,015
    rael dobkins
    Apr 4, 2022
  9. oldsailor7

    Hedley Nicol Trimaran Plans

    oldsailor7, Mar 12, 2010 ... 31 32 33
    Replies:
    480
    Views:
    146,791
    cavalier mk2
    Apr 4, 2022
  10. Qmaran

    Is rigidity a religion? Amas on the move....

    Qmaran, Aug 31, 2021 ... 3 4 5
    Replies:
    74
    Views:
    17,085
    gonzo
    Mar 28, 2022
  11. MrMillard

    Amateur trimaran design critique

    MrMillard, Dec 1, 2021 ... 5 6 7
    Replies:
    98
    Views:
    19,988
    Bobuk25
    Mar 23, 2022
  12. revintage

    Trimaran alignment of hulls with different rocker

    revintage, Mar 1, 2022
    Replies:
    10
    Views:
    4,998
    revintage
    Mar 23, 2022
  13. Flotation

    Bieker B53

    Flotation, Dec 22, 2021
    Replies:
    5
    Views:
    6,083
    redreuben
    Mar 15, 2022
  14. zombat

    KLIS trimaran: owners wanted

    zombat, Dec 5, 2019 ... 2 3
    Replies:
    42
    Views:
    15,355
    jamez
    Mar 2, 2022
  15. waterbear

    Jarcat 6 verions, modifications etc.

    waterbear, Jun 28, 2019 ... 2
    Replies:
    26
    Views:
    20,812
    sailhand
    Feb 27, 2022
  16. BobBill

    More Changes to basic (Malibu) Outrigger...

    BobBill, Feb 25, 2022
    Replies:
    3
    Views:
    4,202
    BobBill
    Feb 26, 2022
  17. Boy Griffioen

    D shape or semi oval advances wing systems shape for double mainsail

    Boy Griffioen, Jan 24, 2022 ... 2
    Replies:
    18
    Views:
    6,611
    Erwan
    Feb 25, 2022
  18. revintage

    Single water stay attachment for both beams

    revintage, Feb 22, 2022
    Replies:
    0
    Views:
    3,749
    revintage
    Feb 22, 2022
  19. terryI

    1977 26' simpson-wild trimaran

    terryI, Jan 7, 2008 ... 2 3 4
    Replies:
    46
    Views:
    33,318
    David Walsh
    Feb 22, 2022
  20. Geno41

    Cat Design comparo question

    Geno41, Jul 28, 2017 ... 2
    Replies:
    25
    Views:
    11,657
    supervisit
    Feb 21, 2022
  21. perry2222

    Dagger board control lines

    perry2222, Feb 12, 2022
    Replies:
    2
    Views:
    4,167
    perry2222
    Feb 13, 2022
  22. rturbett

    First try at making a Shark mould!

    rturbett, Jan 31, 2022
    Replies:
    3
    Views:
    4,448
    rturbett
    Feb 10, 2022
  23. Philippe Lapere

    Advice on 20ft beachcat design and build

    Philippe Lapere, Apr 29, 2021 ... 2 3 4
    Replies:
    52
    Views:
    20,079
    Windward 54
    Feb 5, 2022
  24. rturbett

    Deconstructive testing!

    rturbett, Jan 31, 2022
    Replies:
    5
    Views:
    4,333
    rturbett
    Feb 1, 2022
  25. Corley

    Lock Crowther 1962 Kraken 25 trimaran build and rebuild log

    Corley, Jun 7, 2011 ... 12 13 14
    Replies:
    203
    Views:
    56,547
    revintage
    Feb 1, 2022
  26. revintage

    Windknife trifoiler build

    revintage, Dec 7, 2018 ... 2 3 4
    Replies:
    48
    Views:
    15,271
    revintage
    Jan 29, 2022
  27. Muzammal

    Lack of data about steel multihulls

    Muzammal, May 18, 2021 ... 2 3 4
    Replies:
    46
    Views:
    16,439
    Sand crab
    Jan 27, 2022
  28. MichaelRoberts

    Epoxy water lock for wet exhaust

    MichaelRoberts, Jan 15, 2022 ... 2 3
    Replies:
    33
    Views:
    9,698
    MichaelRoberts
    Jan 27, 2022
  29. rob denney

    Foiler 50

    rob denney, Jan 21, 2022
    Replies:
    1
    Views:
    4,706
    lucdekeyser
    Jan 25, 2022
  30. Iridian

    Catamaran Transport Methods

    Iridian, Dec 19, 2021 ... 2
    Replies:
    25
    Views:
    7,918
    gonzo
    Jan 22, 2022
  31. peteyak

    Rudder mount design for small outrigger

    peteyak, Jan 11, 2022
    Replies:
    13
    Views:
    5,837
    revintage
    Jan 19, 2022
  32. Lachie

    Life is too short to fair above the waterline

    Lachie, Mar 19, 2021 ... 2 3 4
    Replies:
    49
    Views:
    16,033
    rael dobkins
    Jan 14, 2022
  33. PeculiarBob

    Mike Waller yacht design opinions?

    PeculiarBob, Dec 16, 2021 ... 2
    Replies:
    21
    Views:
    10,737
    jamez
    Jan 11, 2022
  34. Paul Scott

    Frankenboat questions

    Paul Scott, Jan 3, 2022
    Replies:
    0
    Views:
    4,968
    Paul Scott
    Jan 3, 2022
  35. sun

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

    sun, Dec 27, 2021
    Replies:
    11
    Views:
    5,852
    jehardiman
    Jan 3, 2022
  36. Manfred.pech

    ...to smash all records

    Manfred.pech, Jan 1, 2022
    Replies:
    9
    Views:
    5,324
    jehardiman
    Jan 1, 2022
  37. guzzis3

    Sydney to Hobart multihulls

    guzzis3, Dec 27, 2021 ... 2
    Replies:
    18
    Views:
    8,331
    redreuben
    Jan 1, 2022
  38. Kuter

    Tri with central hull smaller than side hulls

    Kuter, Dec 23, 2021
    Replies:
    8
    Views:
    6,286
    rxcomposite
    Dec 24, 2021
  39. redreuben

    Vale James Wharram

    redreuben, Dec 18, 2021
    Replies:
    3
    Views:
    5,894
    jamez
    Dec 18, 2021
  40. Roni

    Resistance prediction methods/series for catamarans

    Roni, Jul 8, 2020 ... 2
    Replies:
    20
    Views:
    10,863
    Ad Hoc
    Dec 12, 2021
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