A submersible dwelling cast as a single seamless sphere over an inflated balloon form - aiming at two floors and two bedrooms. Floats for daily life, submerges 1-10 m to ride out storms. Every figure across this site is a live, first-order engineering model you can drive yourself, including the honest floor count.
Each page expands one engineering question with its own interactive model. Start anywhere - they are independent, but they read best in order.
Inscribe a cube in the sphere, carve the curved caps, use the bottom cap as ballast, and stack floors from slab + room height.
Submerged, the enemy is buckling, not flooding. A sphere turns pressure into pure membrane compression. Slide the depth.
Flood ballast to cancel lift, blow it to surface. Fail-safe positive buoyancy, the inward-seating hatch, storm strategy.
An inflated balloon form under a gantry, sprayed monolithically so structure and liner cure as one body. Step through it.
The balloon fabric, the marine shotcrete mix, glass vs carbon vs basalt fibre, and the aircrete insulating liner.
Rank concrete, steel, aluminium, GFRP, CFRP, basalt and titanium on cost, strength, stiffness and corrosion. Interactive.
A carbon-conductive keel patch draws cold from the deep; deck solar makes heat; the aircrete liner buffers the living space.