Multihulls

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

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  1. Matthias S.

    Newbie question: would this trimaran folding system work? (parallel hinge)

    Matthias S., Sep 25, 2020
    Replies:
    11
    Views:
    3,594
    kleppar
    Dec 28, 2020
  2. peterAustralia

    two engines on centerline, Filipino Banca

    peterAustralia, Dec 27, 2020
    Replies:
    8
    Views:
    2,311
    fallguy
    Dec 28, 2020
  3. MichaelRoberts

    Carbon wing mast for Archimedes 60

    MichaelRoberts, Dec 19, 2020
    Replies:
    5
    Views:
    2,068
    MichaelRoberts
    Dec 30, 2020
  4. P Flados

    Small Tri Test Platform

    P Flados, Sep 30, 2014 ... 3 4 5
    Replies:
    68
    Views:
    14,955
    Samuel Langhorn
    Jan 2, 2021
  5. Swift

    Best motor system for a racing tri?

    Swift, Jan 2, 2021
    Replies:
    4
    Views:
    1,466
    Swift
    Jan 3, 2021
  6. redreuben

    Race Navigation

    redreuben, Jan 2, 2021
    Replies:
    1
    Views:
    1,032
    boatgm2
    Jan 3, 2021
  7. onekiwi

    Restoring 1967 B-LION catamaran

    onekiwi, Feb 1, 2015 ... 2
    Replies:
    29
    Views:
    7,407
    Gopherit10
    Jan 3, 2021
  8. Doug Lord

    Small trimarans under 20'

    Doug Lord, Jun 24, 2012 ... 74 75 76
    Replies:
    1,128
    Views:
    337,218
    Tiny Turnip
    Jan 9, 2021
  9. Corley

    Tremolino tales

    Corley, Aug 24, 2017 ... 2 3
    Replies:
    34
    Views:
    9,054
    Russell Brown
    Jan 18, 2021
  10. guzzis3

    Modern hirondelle

    guzzis3, Nov 18, 2016 ... 8 9 10
    Replies:
    147
    Views:
    50,791
    guzzis3
    Jan 26, 2021
  11. MichaelRoberts

    Gooseneck on wing mast

    MichaelRoberts, Jan 25, 2021 ... 2
    Replies:
    18
    Views:
    3,008
    catsketcher
    Jan 28, 2021
  12. philSweet

    Sodebo and Gitana 17 set off on Jules Verne Record attempt

    philSweet, Nov 26, 2020 ... 2 3
    Replies:
    30
    Views:
    4,124
    Doug Lord
    Jan 29, 2021
  13. Herman Miller

    Simpson Slipstream 15 - Opinions?

    Herman Miller, May 6, 2020
    Replies:
    9
    Views:
    3,720
    Andy Muller
    Feb 2, 2021
  14. MichaelRoberts

    How to connect catamaran rudders

    MichaelRoberts, Dec 29, 2020
    Replies:
    13
    Views:
    3,625
    tspeer
    Feb 6, 2021
  15. Gary Bernier

    52' CSK Catamaran

    Gary Bernier, Dec 14, 2020
    Replies:
    3
    Views:
    2,531
    shawn morgan
    Feb 10, 2021
  16. JohnGB

    Modern hull shape vs ideal hydrofoil shape

    JohnGB, Feb 19, 2021 ... 2
    Replies:
    26
    Views:
    7,106
    Mr Efficiency
    Feb 21, 2021
  17. Burnside Style

    Eco 520 aft mast rig

    Burnside Style, Feb 20, 2021
    Replies:
    1
    Views:
    2,211
    jamez
    Feb 23, 2021
  18. Beezer

    Coast guard certified Catamaran

    Beezer, Jan 2, 2021
    Replies:
    12
    Views:
    2,168
    fallguy
    Feb 25, 2021
  19. waynemarlow

    Gaff rig question.

    waynemarlow, Feb 23, 2021
    Replies:
    6
    Views:
    1,728
    Richard Woods
    Feb 27, 2021
  20. Owly

    Tacking Proa (for lack of a better term)

    Owly, Nov 27, 2020 ... 2 3
    Replies:
    31
    Views:
    8,294
    BobBill
    Mar 2, 2021
  21. BobBill

    Hook and Loop Sail

    BobBill, Mar 3, 2021
    Replies:
    4
    Views:
    1,457
    Olav
    Mar 4, 2021
  22. jagercek

    Homemade Weta Trimaran

    jagercek, Mar 7, 2021
    Replies:
    10
    Views:
    3,641
    redreuben
    Mar 8, 2021
  23. TI TI

    Wharram Pahi 31 to give away

    TI TI, Mar 19, 2019
    Replies:
    4
    Views:
    4,882
    Pierre Roger
    Mar 11, 2021
  24. perry2222

    Daggerboard Dreaming

    perry2222, Mar 9, 2021
    Replies:
    6
    Views:
    1,588
    perry2222
    Mar 11, 2021
  25. perry2222

    Fitting a tiller to a cat with tie bar steering

    perry2222, Mar 9, 2021
    Replies:
    4
    Views:
    1,672
    jamez
    Mar 12, 2021
  26. CerealPirate

    HDPE for bottom hull skin or line-x

    CerealPirate, Feb 26, 2021
    Replies:
    13
    Views:
    4,499
    SlickMick
    Mar 17, 2021
  27. guzzis3

    Seasickness

    guzzis3, Mar 18, 2021
    Replies:
    7
    Views:
    1,528
    Mr Efficiency
    Mar 19, 2021
  28. SmallSpaceBigImagination

    Building hull in cross sections

    SmallSpaceBigImagination, Mar 22, 2021 ... 2 3 4
    Replies:
    55
    Views:
    7,701
    Mr Efficiency
    Mar 30, 2021
  29. peterchech

    CSC 30 Catamaran- the coastal passage

    peterchech, Nov 29, 2011 ... 27 28 29
    Replies:
    425
    Views:
    133,813
    Dorydude
    Apr 6, 2021
  30. David L. Dodd II

    Car Toppable Trimaran Pocket Cruiser

    David L. Dodd II, Mar 15, 2021 ... 2
    Replies:
    21
    Views:
    4,965
    David L. Dodd II
    Apr 6, 2021
  31. Lachie

    Hard v round bilge and leeway

    Lachie, Mar 23, 2021
    Replies:
    9
    Views:
    2,206
    guzzis3
    Apr 14, 2021
  32. JunkRat

    Seeking Tradewind route Statistical Data

    JunkRat, Apr 16, 2021
    Replies:
    7
    Views:
    1,355
    CocoonCruisers
    Apr 17, 2021
  33. JunkRat

    What’s formula for estimating catamaran speed? Speed from length better than from design?

    JunkRat, Oct 31, 2020
    Replies:
    10
    Views:
    4,417
    Dolfiman
    Apr 18, 2021
  34. Owly

    Design Spiral into Madness

    Owly, Apr 15, 2021 ... 2
    Replies:
    20
    Views:
    2,977
    guzzis3
    Apr 18, 2021
  35. Gary Curtis

    Query carbon rudder box layup and repair

    Gary Curtis, Apr 5, 2021
    Replies:
    2
    Views:
    1,429
    Ganzi
    Apr 24, 2021
  36. Muzammal

    Building 44' wooden tri with traditional planking

    Muzammal, Apr 19, 2021 ... 2
    Replies:
    20
    Views:
    3,710
    Dejay
    Apr 24, 2021
  37. dustman

    How big would a catamaran have to be...?

    dustman, Apr 23, 2021
    Replies:
    12
    Views:
    2,299
    comfisherman
    Apr 25, 2021
  38. Charlyipad

    best way to stiffen a bridgedeck?

    Charlyipad, Apr 22, 2021
    Replies:
    11
    Views:
    1,926
    Charlyipad
    Apr 25, 2021
  39. Skyak

    Sail GP live on YT

    Skyak, Apr 25, 2021
    Replies:
    1
    Views:
    1,029
    Skyak
    Apr 25, 2021
  40. Doug Lord

    New Trimaran Foilers

    Doug Lord, Jun 8, 2016 ... 17 18 19
    Replies:
    276
    Views:
    53,061
    Vantage475T
    Apr 26, 2021
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