Large Angle of Stability with Maxsurf

Hello, i'm a engeenering student, i was trying to run a stability analysis with maxsurf and i was wondering if as a data imput i need to insert deck bride or only hull is fine ?

 

In Maxsurf you have to do exactly the same as if you calculated it by hand.

 

Ok, so i don't need a deck surface on model ? i was wondering for freeboard calcs

 

What you need if to clearly define the volume that serves as buoyancy reserve.
Talking of Maxsurf, if you have an open space, the application tries to close it. So, probably you don't need the deck but you need to perfectly define the sheer line.

 

Thank you so much, i guess sheer line is auto detected on maxsurf, my doubt was whether it was possible to have a vanish stability angle of 110 deg (it's a planing hull Lwl=12m, Bwl=4m)

 

I don' t thing possible a so huge angle. How is your boat?. Should have a watertight superstructure. Then you do need to define deck and sp.

 

I didn't define any deck or watertight superstructure, i've just the hull, and running analysis that was my result
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The righting arm curve shape seems correct but its maximum value and the maximum GZ angle are, imo, very high. I think the avs is too big, under normal conditions it should be less than 90º. However, with the data you show us I can't say anything more. Check the weight calculation carefully, as it is possible that your CoG is too low.

 

i will, many thank's for your help !!!