Multihull microcruiser design considerations (capsize survival)

Discussion in 'Multihulls' started by magwas, Jan 5, 2025.

  1. Herreshock

    Herreshock Previous Member

    Look at my post Albatross trimaran on the main boat design forum, in the last comment I'm talking about capsizing prevention and recovery
     
  2. magwas
    Joined: Oct 2009
    Posts: 304
    Likes: 10, Points: 18, Legacy Rep: 47
    Location: Hungary

    magwas Senior Member

    I like the concept of "flood the ama, turn it up and deflood it", but if I build from wood, a lot of ballast is needed to put into the ama to balance the buoyancy of wood.

    It occured to me that I could put some batteries there. I made some calculations, and it seems that I would need 8 pieces of 230 Ah LiFePo batteries for the needed mass. It is 28 KwH.
    Seems quite overkill for a small boat.

    The ama as designed is 7m long (same as waka), 0.6m high and 0.6m beam. At 0.3m design draft it has 0.347 m3 displacement. Arguably too big for a waka twice its height and beam. I kept it beefy because I am thinking of Harry proa. Probably I should move the mast to the waka and make the ama as small as possible.

    Probably the fact that I calculated with 2cm thick wood (at 0.4 T/m3) also did not help.
     
  3. montero
    Joined: Nov 2024
    Posts: 286
    Likes: 34, Points: 28
    Location: Poland

    montero Senior Member

    You can use some scull boat hulls . Cut them or not and modify. They are light even wooden ones.
     

  4. montero
    Joined: Nov 2024
    Posts: 286
    Likes: 34, Points: 28
    Location: Poland

    montero Senior Member

Loading...
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.