Main beam waterstays on small foiling tri

Discussion in 'Multihulls' started by revintage, Mar 25, 2019.

  1. Doug Halsey
    Joined: Feb 2007
    Posts: 385
    Likes: 92, Points: 38, Legacy Rep: 160
    Location: California, USA

    Doug Halsey Senior Member

    It's about 19" (48cm) deck-to-bottom.

    I like the look of your beam attachment as is & don't think you should go out of your way to raise it.

    It's up to you of course. Just another design decision.
    revintage likes this.

  2. revintage
    Joined: Nov 2016
    Posts: 176
    Likes: 37, Points: 28, Legacy Rep: 10
    Location: Sweden

    revintage Senior Member

    Thanks Doug,

    A Tornado´s dolphin strut is ca 24cm from the underside of the beam, with the band attached to the beam at ca 115cm. This is 11,5 degrees.

    A Nacra 18SQ has a 23,5 cm strut at 135cm: 10 degrees.

    So let´s go for 10 degrees

    Using a 26cm strut to get the same angle as the 18SQ DS, the waterstays will be at 23,5cm where they come out of the hull sides, if the stays are attached to the beam at 150cm. Works for me. Have added this to my previous sketch.
    Last edited: Mar 28, 2019
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