Venus Foam: engineering analysis of a modular floating platform fleet in the Venus cloud layer

Abstract

Venus Foam is an engineering-physics analysis of a modular floating station in the Venus cloud layer (55.7 km, 22 °C, 0.49 atm). The station stays aloft on the difference in gas densities rather than tethers or thrust, and is built from many identical inflatable cells: its size and shape are a scaling parameter, not a fixed design. Every numerical claim is either recomputed from physical constants in the open verify.py script or backed by a cited source or precedent; unresolved points are collected in an open-questions section. The document covers the environment, materials, platform structure and key figures, the closed day/night power balance, engineless station-keeping, fleet specialization and the link to orbit, delivery and commissioning, resources and production, critical imports, legal status, and social and quality-of-life questions. Version 2: adds a "Delivery and commissioning" section (first uncrewed flight — a ring of six hydrogen floats around a central inflatable habitat, an entry–descent–inflation profile after the NASA HAVOC precedent, crew arriving on a separate flight); switches the load-bearing material from basalt fiber to a carbon-fiber composite synthesized from atmospheric CO₂ by molten-carbonate electrolysis; adds a platform structural load-path analysis; reworks the figures and the source list; and applies a full editorial pass to the prose.