Multihulls

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

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  1. Doug Lord

    Dynamic lift(downforce): Cat vs Tri-

    Doug Lord, May 1, 2019
    Replies:
    0
    Views:
    640
    Doug Lord
    May 1, 2019
  2. guzzis3

    a better tiki 21

    guzzis3, May 7, 2019 ... 11 12 13
    Replies:
    189
    Views:
    27,802
    Mark Waters
    Feb 11, 2020
  3. Doug Lord

    Bill Roberts is gone

    Doug Lord, May 9, 2019
    Replies:
    0
    Views:
    754
    Doug Lord
    May 9, 2019
  4. Manfred.pech

    Tamanu

    Manfred.pech, May 11, 2019
    Replies:
    0
    Views:
    753
    Manfred.pech
    May 11, 2019
  5. Tom Mckinney

    Conversion of trapeze dinghy [FD] to trimaran?

    Tom Mckinney, May 11, 2019
    Replies:
    4
    Views:
    783
    Steve Clark
    May 11, 2019
  6. midlifecrisis

    Short hull trimaran

    midlifecrisis, May 12, 2019 ... 2 3
    Replies:
    36
    Views:
    2,963
    drivejunk
    Nov 10, 2020
  7. SolGato

    Rudder positioning powered catamaran

    SolGato, May 13, 2019 ... 2
    Replies:
    17
    Views:
    1,642
    SolGato
    May 16, 2019
  8. Will001

    Trimaran folding system attachment

    Will001, May 13, 2019 ... 2
    Replies:
    26
    Views:
    2,566
    W17 designer
    May 20, 2019
  9. SolGato

    Swing Wing Catamaran Design

    SolGato, May 14, 2019
    Replies:
    4
    Views:
    1,373
    SolGato
    May 15, 2019
  10. SolGato

    My next electric catamaran project

    SolGato, May 15, 2019
    Replies:
    8
    Views:
    1,165
    coolmike
    May 17, 2019
  11. Doug Lord

    20' and under trimaran beam-less than square, square or oversquare-and why.

    Doug Lord, May 15, 2019 ... 2
    Replies:
    17
    Views:
    1,836
    patzefran
    Jun 2, 2019
  12. Elliot DeYoung

    Cat rudder design help

    Elliot DeYoung, May 15, 2019
    Replies:
    1
    Views:
    626
    SolGato
    May 15, 2019
  13. SolGato

    Tremolino -mixing old with new

    SolGato, May 17, 2019
    Replies:
    14
    Views:
    2,199
    Corley
    May 19, 2019
  14. Eric Lundy

    Horizontal fin drive trimaran

    Eric Lundy, May 21, 2019
    Replies:
    3
    Views:
    809
    Doug Lord
    May 25, 2019
  15. cluttonfred

    Easily trailerable catamaran weekend boat

    cluttonfred, May 23, 2019
    Replies:
    7
    Views:
    2,496
    Richard Woods
    Feb 16, 2020
  16. oldmulti

    Multihull Structure Thoughts

    oldmulti, May 27, 2019 ... 120 121 122
    Replies:
    1,824
    Views:
    229,194
    oldmulti
    Jun 15, 2021 at 3:38 PM
  17. Doug Lord

    T2 Foiling Trimaran

    Doug Lord, May 29, 2019
    Replies:
    6
    Views:
    1,432
    Doug Lord
    Jun 21, 2019
  18. Wally2

    Recommend me an angle of attack for outboards on a catamaran

    Wally2, Jun 2, 2019
    Replies:
    9
    Views:
    1,308
    fastsailing
    Jun 9, 2019
  19. Kym Bouckaert

    Triwanderer Hedley Nicol

    Kym Bouckaert, Jun 3, 2019
    Replies:
    6
    Views:
    1,071
    RJW Adelaide
    Jun 15, 2020
  20. Corley

    R2ak 2019

    Corley, Jun 3, 2019
    Replies:
    11
    Views:
    1,253
    Corley
    Jun 28, 2019
  21. sailhawaii

    Designing a 43' flat panel performance cruising catamaran

    sailhawaii, Jun 7, 2019
    Replies:
    9
    Views:
    2,859
    sailhawaii
    Jul 9, 2019
  22. Newickspark
    Locked

    New idea for a camping Tri

    Newickspark, Jun 14, 2019
    Replies:
    1
    Views:
    652
    jamez
    Jun 16, 2019
  23. Newickspark
    Locked

    Ljungström Sail

    Newickspark, Jun 16, 2019 ... 2
    Replies:
    28
    Views:
    2,316
    peterbike
    Jun 22, 2019
  24. Newickspark
    Locked

    World crushing-Fast-under 30’ Tri

    Newickspark, Jun 17, 2019 ... 2
    Replies:
    24
    Views:
    2,282
    Doug Lord
    Jun 27, 2019
  25. magwas

    Boat designer for a steel origami cat?

    magwas, Jun 17, 2019
    Replies:
    12
    Views:
    1,152
    guzzis3
    Jun 20, 2019
  26. guzzis3

    Crabclaw rigs

    guzzis3, Jun 19, 2019 ... 2
    Replies:
    27
    Views:
    4,587
    rwatson
    Oct 20, 2019
  27. revintage

    Second forestay chainplate on A-cat hull

    revintage, Jun 25, 2019 ... 2
    Replies:
    27
    Views:
    1,626
    revintage
    Jul 15, 2019
  28. Coastal Ogre

    Re-tabbing Bulkheads on a Production Catamaran

    Coastal Ogre, Jun 28, 2019
    Replies:
    10
    Views:
    1,725
    Coastal Ogre
    Jul 5, 2019
  29. waterbear

    Jarcat 6 verions, modifications etc.

    waterbear, Jun 28, 2019 ... 2
    Replies:
    17
    Views:
    6,380
    guzzis3
    Jul 2, 2019
  30. Damon Cruz

    Horstman 45 rudder mod

    Damon Cruz, Jul 3, 2019
    Replies:
    3
    Views:
    810
    Scuff
    Sep 4, 2019
  31. Dolfiman

    Ultims in next Fastnet race 3rd August

    Dolfiman, Jul 6, 2019 ... 2
    Replies:
    18
    Views:
    1,488
    Doug Lord
    Aug 21, 2019
  32. Squidly-Diddly

    11 metre cat flips in rough seas, 3 dead

    Squidly-Diddly, Jul 11, 2019
    Replies:
    14
    Views:
    2,330
    sailhand
    Jul 29, 2019
  33. Triroo

    Drogue

    Triroo, Jul 13, 2019
    Replies:
    3
    Views:
    648
    dsigned
    Jul 22, 2019
  34. InetRoadkill

    Cockpit location on a tri/pod cat hybrid.

    InetRoadkill, Jul 18, 2019
    Replies:
    2
    Views:
    791
    InetRoadkill
    Jul 19, 2019
  35. InetRoadkill

    Horizontal paddle at front of hull?

    InetRoadkill, Jul 20, 2019 ... 2
    Replies:
    19
    Views:
    1,338
    InetRoadkill
    Jul 24, 2019
  36. Builder45

    Multihull compression post base

    Builder45, Jul 22, 2019
    Replies:
    8
    Views:
    1,475
    brian eiland
    Jun 21, 2020
  37. ChrisZ

    Pod catamaran rocker?

    ChrisZ, Jul 23, 2019 ... 2
    Replies:
    17
    Views:
    2,391
    Manfred.pech
    Jul 27, 2019
  38. Rene Amyot

    I built a small beach cat

    Rene Amyot, Jul 24, 2019
    Replies:
    13
    Views:
    1,599
    Rene Amyot
    Aug 5, 2019
  39. Doug Lord

    Hydroptere-Sad End to a Great Lady

    Doug Lord, Jul 27, 2019
    Replies:
    3
    Views:
    1,587
    Doug Lord
    Aug 28, 2019
  40. rael dobkins

    A Junk Rig for a Pacific Proa...

    rael dobkins, Jul 28, 2019
    Replies:
    2
    Views:
    937
    rael dobkins
    Jul 29, 2019
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