- Scrap Iron
Scrap iron or lead would make the best ballasts from a physical standpoint, but are expensive. Concrete and earth are much cheaper. The trade off is that you need a much greater volume of material to get the same amount of ballast.
|Structure requirements · PintStead · Spar · Semi-submersible · Submersible · Boats · Materials · Stability · Propulsion · Collaborative Design · Space Frame · Thin Shell Ferrocement · Pneumatically Stabilized Platforms · Low Cost Seastead · Conex dumbbell · Low Cost Wave Tank · Scale models · Gyroscopes · Concrete · Stabilizers|