Replace ply stringers with fibreglass system

Discussion in 'Fiberglass and Composite Boat Building' started by Carpenter Matt, Jul 10, 2018.


  1. Mr Efficiency
    Joined: Oct 2010
    Posts: 6,472
    Likes: 152, Points: 63, Legacy Rep: 702
    Location: Australia

    Mr Efficiency Senior Member

    Whilst the fibreglass stringer idea is not that difficult to execute, using a former like PU foam, and there is little need for a smooth finish, as it is hidden out of sight, it is possible in a small boat like this, to eliminate longitudinal stringers entirely, by using sandwich construction, utilising the existing bottom as the outer skin, a core such as PVC, and a relatively thin inner skin, using high strength reinforcements. As an added bonus, you get a boat that is quieter. You just have to get a good bond between the foam and the existing hull, and that is not too difficult, with small squares, or scored foam, and the help of enough weight, like small sandbags, to keep the foam in contact with the hull, while it sets up. Once the sandwich is completed, you can add a couple of foam sandwich bulkheads, and span with a sandwich panel as the sole. The end result, weight wise, won't be much different than before. The key point is if the right materials are used, the inner skin does not need to be thick and weighty, as point impacts that might pierce it, are not a problem under a cockpit sole.
     
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