Multihull microcruiser design considerations (capsize survival)

[Herreshock]

Look at my post Albatross trimaran on the main boat design forum, in the last comment I'm talking about capsizing prevention and recovery

 

[magwas]

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.

 

[montero]

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

 

[montero]

tortured ply theory https://www.boatdesign.net/threads/tortured-ply-theory.37934/