Multihulls

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

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  1. trip the light fandango

    building new amas/floats from recycled beachcat hulls

    trip the light fandango, Apr 23, 2019 ... 7 8 9
    Replies:
    125
    Views:
    27,651
    trip the light fandango
    Apr 16, 2023
  2. MichaelRoberts

    Forces on transom rudder

    MichaelRoberts, Mar 13, 2023
    Replies:
    14
    Views:
    5,769
    MichaelRoberts
    Apr 15, 2023
  3. revintage

    Forestay bridle fitting

    revintage, Mar 29, 2023
    Replies:
    8
    Views:
    2,613
    revintage
    Apr 14, 2023
  4. pavel915

    Connecting the demi hulls

    pavel915, Mar 22, 2023 ... 2
    Replies:
    21
    Views:
    4,711
    oldmulti
    Mar 29, 2023
  5. Jeff in Boston

    Order of importance for hull efficiency

    Jeff in Boston, Sep 15, 2020
    Replies:
    12
    Views:
    4,169
    Capt. Peter Wilcox
    Mar 25, 2023
  6. waldemar de vries

    Fontaine Pajot Athena 38

    waldemar de vries, Mar 17, 2023
    Replies:
    2
    Views:
    1,826
    waldemar de vries
    Mar 23, 2023
  7. lane

    Trimaran amas using extruded polystyrene with epoxy

    lane, Mar 8, 2023 ... 2
    Replies:
    22
    Views:
    5,571
    lane
    Mar 23, 2023
  8. pavel915

    Wooden Catamaran Concept Design

    pavel915, Mar 21, 2023
    Replies:
    7
    Views:
    3,488
    pavel915
    Mar 21, 2023
  9. HydroNick

    Gougeon Wing Mast Plans

    HydroNick, Apr 4, 2010 ... 2 3
    Replies:
    39
    Views:
    33,201
    MichaelRoberts
    Mar 15, 2023
  10. SailorScience

    Who do you recommend for a major 900K USD build?

    SailorScience, Mar 13, 2023
    Replies:
    6
    Views:
    2,617
    bajansailor
    Mar 14, 2023
  11. lane

    Trimaran with Parallel Rig

    lane, Mar 12, 2023
    Replies:
    3
    Views:
    2,334
    lane
    Mar 13, 2023
  12. Bronwen Clark

    Lex Nicol designed catamaran mould

    Bronwen Clark, Mar 4, 2023
    Replies:
    5
    Views:
    2,271
    oldmulti
    Mar 6, 2023
  13. BananaMan777

    Best resources for learning boat design (Planing hulls)

    BananaMan777, Mar 4, 2023
    Replies:
    10
    Views:
    4,230
    bajansailor
    Mar 4, 2023
  14. Andrea Wasserliebend

    Ratio of lateral to sail area

    Andrea Wasserliebend, Mar 3, 2023
    Replies:
    5
    Views:
    2,339
    Skyak
    Mar 3, 2023
  15. SolGato

    Rotating Mast Control and Daggerboard Uphaul

    SolGato, Feb 12, 2023
    Replies:
    8
    Views:
    3,483
    SolGato
    Feb 20, 2023
  16. Andrea Wasserliebend

    Looking for a small coastal cruising catamaran

    Andrea Wasserliebend, Feb 17, 2023
    Replies:
    6
    Views:
    5,663
    fallguy
    Feb 18, 2023
  17. geoffkryten

    Catamaran math problem

    geoffkryten, Feb 17, 2023
    Replies:
    3
    Views:
    2,602
    bajansailor
    Feb 18, 2023
  18. lane

    Split Paddleboard for Amas

    lane, Sep 30, 2022 ... 2
    Replies:
    15
    Views:
    4,695
    BlueBell
    Feb 17, 2023
  19. Sylvain Savoie

    Trimaran fiberglass vs aluminum

    Sylvain Savoie, Feb 13, 2023
    Replies:
    4
    Views:
    4,143
    SolGato
    Feb 14, 2023
  20. Kaido Loor

    Passive air cushion hull bottom

    Kaido Loor, Feb 4, 2023
    Replies:
    4
    Views:
    2,245
    jehardiman
    Feb 4, 2023
  21. tropostudio

    Cat Ketch or Cat Schooner Rig on Trimaran...

    tropostudio, Jan 27, 2023
    Replies:
    13
    Views:
    3,879
    tropostudio
    Jan 29, 2023
  22. fallguy

    Derek Kelsall

    fallguy, Dec 17, 2022
    Replies:
    5
    Views:
    2,566
    rwatson
    Jan 24, 2023
  23. hashtag_laeuft

    Design of 16' foot beach catamaran

    hashtag_laeuft, Aug 15, 2017 ... 2 3 4
    Replies:
    57
    Views:
    20,304
    BobBill
    Jan 18, 2023
  24. Doug Lord

    High Performance MPX Foil/Self-righting Trimaran-The Test Model

    Doug Lord, Dec 28, 2010 ... 198 199 200
    Replies:
    2,991
    Views:
    832,477
    Nicholas cravey
    Jan 18, 2023
  25. ThomD

    Taulua - The Movie "All for a Horse"

    ThomD, Nov 20, 2022
    Replies:
    3
    Views:
    2,228
    Cheevo
    Jan 15, 2023
  26. fallguy

    Bow anchoring

    fallguy, Oct 10, 2020 ... 2 3
    Replies:
    34
    Views:
    6,770
    fallguy
    Jan 10, 2023
  27. David L. Huber

    Hull shape addressing breaking effect from pitching

    David L. Huber, Jan 6, 2023
    Replies:
    3
    Views:
    2,620
    oldmulti
    Jan 6, 2023
  28. Victor Izidoro da silva

    trimaran buccaneer 28- Crowther 28

    Victor Izidoro da silva, Dec 29, 2022
    Replies:
    2
    Views:
    2,840
    bruceb
    Dec 30, 2022
  29. rael dobkins

    Proa Rudderless, Down Wind sailing!

    rael dobkins, Dec 13, 2022
    Replies:
    0
    Views:
    2,041
    rael dobkins
    Dec 13, 2022
  30. Doug Lord

    A Class Cat Design-Board Hydrodynamics(Tom Speer)

    Doug Lord, Jul 13, 2014
    Replies:
    5
    Views:
    3,675
    wet feet
    Dec 6, 2022
  31. BobBill

    Seeking Assistance, Again

    BobBill, Nov 21, 2022
    Replies:
    3
    Views:
    1,706
    fallguy
    Nov 21, 2022
  32. rturbett

    Catamaran hull alignment

    rturbett, Nov 20, 2022
    Replies:
    2
    Views:
    2,205
    fallguy
    Nov 20, 2022
  33. rturbett

    Multi-hull history question

    rturbett, Oct 24, 2022
    Replies:
    7
    Views:
    2,702
    ThomD
    Nov 20, 2022
  34. John Rivers

    Are there warps or drogues that prevent pitchpoling

    John Rivers, Oct 11, 2022
    Replies:
    13
    Views:
    2,849
    ThomD
    Nov 20, 2022
  35. Jacobra

    24 ft Proa Design

    Jacobra, Nov 21, 2020
    Replies:
    5
    Views:
    5,473
    Jacobra
    Nov 19, 2022
  36. Tom Mark Page

    Crowther 33 Buccaneer

    Tom Mark Page, Jun 9, 2021 ... 2 3
    Replies:
    42
    Views:
    17,311
    bruceb
    Nov 3, 2022
  37. BCowan

    Raidboat Pacific Proa

    BCowan, Sep 2, 2020 ... 2 3 4
    Replies:
    49
    Views:
    29,118
    BCowan
    Oct 28, 2022
  38. Gary Baigent

    Historical multihulls

    Gary Baigent, Feb 26, 2012 ... 89 90 91
    Replies:
    1,355
    Views:
    487,754
    John G 830J
    Oct 14, 2022
  39. Corley

    Composite forestay attachment point.

    Corley, Oct 9, 2011 ... 2
    Replies:
    21
    Views:
    9,188
    revintage
    Oct 11, 2022
  40. John Rivers

    Running curved dagger boards retracted under load

    John Rivers, Oct 7, 2022
    Replies:
    1
    Views:
    1,646
    seandepagnier
    Oct 8, 2022
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