Rudder lift on Boardless Catamarans?

Discussion in 'Multihulls' started by Paul Scott, Apr 12, 2023.

  1. Paul Scott
    Joined: Sep 2004
    Posts: 608
    Likes: 112, Points: 43, Legacy Rep: 84
    Location: San Juan Island, Washington

    Paul Scott Senior Member

    80F79F82-33DF-41CF-98D5-6B1D0C6728C4.png 77E495C1-FE89-49C6-A2B4-159D3F3353D4.jpeg

    How much?

    For example, Dart 16, Dart 18, Hobie 16

    Attached Files:

  2. MalSmith
    Joined: May 2004
    Posts: 162
    Likes: 16, Points: 18, Legacy Rep: 116
    Location: Australia

    MalSmith Ignorant boat designer

    How much depends on how far aft the rig is. Over the years, Hobie 16's have raked their rigs further aft to increase the loading on the more efficient high aspect ratio rudder, as opposed to the relatively shallow hull. However, I'm sure you could reach a point where the rig was so far aft, that you would get stuck in irons every time you tacked. ;)
    Paul Scott likes this.
  3. patzefran
    Joined: Feb 2011
    Posts: 381
    Likes: 58, Points: 28, Legacy Rep: 10
    Location: france

    patzefran patzefran

    Not much on the Dart 18, as you can't adjust rudder's rake to balance the helm
    Paul Scott likes this.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.