Hydrostatics & Stability

I get an error when I run hydrostatics using Weight (rather than Model Sinkage), although it runs fine when the Model Sinkage is specified.
This issue has to do with the initial waterplane height for the free-float iteration. When you specify a weight (and/or cg) for the hydrostatics, the soluti...
Wed, 23 Sep, 2015 at 4:38 PM
Why aren't the Cp (prismatic coefficient) and Cx (maximum section coefficient) reported?
Although Orca3D uses a mesh to compute most of the hydrostatics, certain quantities can only be computed from stations. These include the prismatic and maxi...
Wed, 23 Sep, 2015 at 4:39 PM
I get an error when I try to run hydrostatics. Why can't I get results?
This usually results from Orca3D not being able to find an equilibrium. Often the cause is a surface edge becoming submerged, such as the deck edge when the...
Mon, 28 Sep, 2015 at 4:33 PM
Why is the Displacement value too low?
Possible reasons for this include: If you have modeled only half of the hull, but not checked the “Mirror About the Centerplane” box, your valu...
Mon, 28 Sep, 2015 at 4:35 PM
Why is the Displacement value negative?
Surfaces in Rhino have the concept of an “inside” and an “outside.” The outside should be the side in contact with the water; if not, the volume of that sur...
Mon, 28 Sep, 2015 at 4:35 PM
Why is there a spike in the sectional area curve?
If you have two surfaces joined in a station plane that coincides exactly with one of the station locations that you have defined, Orca3D will com...
Mon, 28 Sep, 2015 at 4:36 PM
Analyzing Hydrostatics when the Waterplane Intersects Dry Surfaces (e.g., Interiors, Cockpits, RIB tubes, etc.)
    Incorrect results are possible when the waterplane intersects interior "dry" surfaces, either in an upright or heeled condition. ...
Thu, 22 Oct, 2015 at 3:15 PM