Every sheet and chart here is generated by calc/scripts/make_drawings.py from the table of offsets and the models. Nothing is drawn by hand, which means a drawing cannot quietly disagree with the numbers — and a change to the offsets redraws the boat. SVG for the web, PDF for the sheets a naval architect would want to print.
Lines plan SW-LP01 Rev 0a
Profile, half-breadth plan and body plan, drawn from the table of offsets. Two working chines in orange, the boot seam dashed, watertight bulkheads in blue.SVG · PDF
Outboard profile
The character drawing: sprung sheer, spoon stem, integral stern platforms, a deckhouse at 46 % of length overall, and the solar roof carried aft over the cockpit on posts.SVG · PDF
Midship section and the facet ladder
The section at station 6 against its equal-area round-bilge counterpart, and the computed cost of every facet count from three strakes to round.SVG · PDF
Power and resistance
Bus power against speed with the model's uncertainty band, and the friction–wave–air split across the range.SVG · PDF
Energy
The Maine seasonal balance, the free miles the surplus buys, and silent range on 102 kWh usable.SVG · PDF
Twin-hull interference
Wave resistance relative to two independent hulls, against speed, at a hull spacing of one third the waterline length.SVG
Sectional area curve
Hump-free and monotone about its maximum, which is the single most diagnostic curve a hull has.SVG
Weight ledger
Where the 11.8 tonnes of lightship sits, and what 500 kg is worth in knots.SVG
