Help for strakes

Discussion in 'Boat Design' started by jfblouin, Dec 2, 2005.

  1. jfblouin
    Joined: Sep 2004
    Posts: 163
    Likes: 1, Points: 0, Legacy Rep: 24
    Location: Chandler(Gaspesie) Quebec

    jfblouin Senior Member

    Hi

    I just finish fairing on my hull and before primer, I need advice on strakes.

    For fiberglass layup, I sand strake edge to a round shape. During fairing I reshape the strake edge but now my edge are in putty so I dont want to keep them too sharp. What is the maximum radius allowed for good water s├ęparation on strake edge. I look in many books without succes.

    Thanks

    I'll begin primer next week.
     

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  2. fede
    Joined: Sep 2003
    Posts: 238
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    Location: milano

    fede Senior Member

    I've seen many do sharp strakes in putty with no problem...it has to be a good strong putty though (epoxy putty is very good)
    There is no maximum radius as I know,but the sharper you get the best your strakes will serve
     
  3. rxcomposite
    Joined: Jan 2005
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    Location: Philippines

    rxcomposite Senior Member

    Fede is right. The purpose of the strakes (or chine) is to have the water separate cleanly fom the hull bottom so no eddies are formed. Eddies are residual resistance that slows down the boat. 1/8" or 1/16" is common. If too sharp, it will break quite often.
     

  4. jfblouin
    Joined: Sep 2004
    Posts: 163
    Likes: 1, Points: 0, Legacy Rep: 24
    Location: Chandler(Gaspesie) Quebec

    jfblouin Senior Member

    Thanks a lot
    I will reshap them with 1/16" radius. They are in epoxy putty with a lot of silica fumed
     
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