When does lunar surface manufacturing become cheaper than Earth launch for orbital infrastructure?

Current Answer

No synthesis yet. The engine is still gathering evidence across the question tree.

Top-Level Questions

What is the projected cost per kg to LEO from Earth launch over 2026-2040, with realistic uncertainty bands? open

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What is the projected cost per kg from lunar surface to LEO over 2026-2040, broken out by chemical rocket vs mass driver delivery? open

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Which orbital-infrastructure materials (structural Al/Fe/Si/Ti, glass, oxygen, propellants) are plausibly producible from lunar regolith without complex Earth imports, and at what TRL by 2040? open

○ research ○ calc ○ reconcile ○ source-review ○ consistency ○ write
What capital-mass-to-product-mass ratio (Metzger's gear ratio) must lunar capital achieve for economic viability, and is this attainable with realistic ISRU technology? 1/6 done

✓ research ○ calc ○ reconcile ○ source-review ○ consistency ○ write

1 source captured
What upfront capex and what discrete engineering milestones are required to establish a lunar manufacturing base capable of net-positive export, and how compressible is each milestone under industrial-explosion or TAI-grade automation? open

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What is the projected demand for structural mass and propellant in LEO and cislunar space 2026-2040, split by use case (data centers, solar power, depots, deep-space missions)? open

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What engineering and capital work remains before a lunar mass driver is operational, how compressible is each step under industrial-explosion or TAI-level automation, and how much does the root answer depend on its availability vs. chemical-rocket-only delivery? open

○ research ○ calc ○ reconcile ○ source-review ○ consistency ○ write
Integrating Starship cost curve, lunar gear ratio, ISRU feasibility, capital buildup, and orbital demand: when (if ever) does lunar-sourced bulk mass beat Earth-launched mass for orbital infrastructure, and under what scenarios does the crossover materialise? open

○ research ○ calc ○ reconcile ○ source-review ○ consistency ○ write