True scale, one demihull. The body plan shows aft stations on the left and forward stations on the right, drawn larger. Export the same drawing as a DXF from the Export tab.
Hydrostatics at the design waterline
Righting lever curve
GZ at fixed trim, KG as entered. The dotted line rises at the slope of GMT and reaches GM at 57.3° (one radian).
Criteria
GZ table
Calm-water resistance
At design speed
Resistance table
Export
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Lines plan
Profile, half-breadth plan and body plan with stations, waterlines and buttocks on separate layers. R12 DXF in mm. Opens in Rhino, AutoCAD, LibreCAD and laser or CNC software.
hullforge_lines.dxfTable of offsets
Half-breadths at 21 stations and six waterlines, in mm, with keel height. For lofting, hand fairing or checking against a builder's frames.
hullforge_offsets.csv3D hull mesh
Closed mesh of the hull or both demihulls, with deck and transom. OBJ in metres for Rhino or Blender, STL in mm for 3D printing a model.
hullforge_hull.obj · .stlDesign summary
Inputs, hydrostatics, the GZ curve, criteria and the resistance table as JSON, for reports or for re-loading in your own scripts.
hullforge_design.json