Horizontal sailing systems/t-mod crab claw

Discussion in 'Boat Design' started by BMP, Sep 2, 2022.

  1. BMP
    Joined: Jun 2022
    Posts: 37
    Likes: 4, Points: 8
    Location: PNW

    BMP Junior Member

  2. BMP
    Joined: Jun 2022
    Posts: 37
    Likes: 4, Points: 8
    Location: PNW

    BMP Junior Member

    Here is a video of the rig sailing:

    There are a bunch more videos on this channel of the same or similar rigs.
  3. Will Gilmore
    Joined: Aug 2017
    Posts: 839
    Likes: 355, Points: 63
    Location: Littleton, nh

    Will Gilmore Senior Member

    I think this type of rig has a lot to offer. The glider wing style sail and kite sail have proven to be very fast.

    Some advantages I see in them include:
    • upward lift. Upward lift should reduce heeling and actually lighten the boat's displacement in the water.
    • reefing without reducing sail. There may be weather where less sail is necessary due to both the harsh turbulence and the strain of high wind speeds on the rig itself, but in twenty to thirty knot winds, I can see where angling the sail would have a similar effect to reducing sail.
    • Conventional sailing techniques. Many sailors learned to sail on a Sunfish. Basically, this rig could be sailed with the same techniques learned on the Pacific Lateen rig of the Sunfish.

    If I were to design a micro-cruiser for ocean crossing, I'd seriously consider this design.

    Disadvantages might be:
    ° Unconventionality. The unconventional rig means a learning curve, a lack of performance data and sailing wisdom. It may also mean parts have to be specially ordered to repairs and replacements.
    ° Reefing. It looks difficult to actually reduce sail. I'm certain that this issue could be overcome, but this looks like a major drawback for larger bodies of water.
    ° Stowage. How shows this sail easily furl or stow for the short-term? At anchor or just a picnic on the beach, does the whole rig have to come down?

  4. Gravio
    Joined: Feb 2020
    Posts: 9
    Likes: 2, Points: 3
    Location: USSR

    Gravio Junior Member

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