Source Review: Mobius Risk Group — Fueling Starships (Oct 2024)

Verdict: Consistent Confidence: high

The Mobius analysis is the most concrete tier-C anchor on Starship's methane demand at aspirational cadence. Its 4,600 t per-stack propellant figure matches Block-1/early-Block-2 Wikipedia specs; the 3.6:1 LOX:LCH4 ratio and per-launch 62.24 mmscf NG are internally consistent with EIA primary data and q1's derived 62 mmscf. The "2.1× US daily natural gas" headline at Musk-aspirational 1.1M launches/yr matches our derived saturation point (~545,000 launches/yr at 100% US NG, → 2× saturation at 1.1M flights). The post's narrow scope (methane only, no LOX, no atmospheric) is a feature, not a bug — it's the canonical commodity-market source on Starship's methane footprint. Useful as a reconcile-pass anchor for q1.c4.

Abstract

Mobius Risk Group's energy-market analysts assess the natural-gas and oxygen demand implied by SpaceX's aspirational Starship launch cadence. They model a full Starship + Super Heavy stack as consuming approximately 4,600 metric tons of propellant per launch (3,400 t booster + 1,200 t ship), of which roughly 1,278 t is liquid methane and the balance is liquid oxygen at a 3.6:1 LOX:LCH4 ratio. Translated to natural-gas standard cubic feet, one launch consumes ~62.24 million scf of natural gas equivalent. The aggressive "1,000 ships × 3 flights/day = 1,095,000 flights/year" cadence Musk has stated as long-term aspiration implies methane demand of ~186.7 Bcf/d, which is approximately 2.1× the entire US daily natural gas consumption in 2023 (89.1 Bcf/d). The post does not separately assess LOX supply, ASU economics, or atmospheric impact.

Key claims

• starship-block1-propellant-mass: "4,600 tons (10.1 million lb)" per full stack — Block 1 / early Block 2 specification.
• starship-methane-mass: "~1,278 metric tons or ~62.24 million standard cubic feet" per launch.
• starship-lox-methane-ratio: "3.6:1" oxygen-to-methane mixture ratio.
• musk-aspirational-cadence: "1,000 Starships flying three flights per day" target.
• methane-demand-vs-us-supply: At Musk-aspirational cadence, "nearly 2.1x the US' total daily natural gas consumption in 2023 (89.1 Bcf/d)".

Reviewer notes

Load-bearing for the q1 calc as the canonical commodity-analysis source on Starship's methane footprint. The 4,600 t figure aligns with Block 1; Block 3 numbers (per Wikipedia) are ~5,650 t total. The author is anonymous but the publication has standing in energy / commodity markets. No analysis of LOX bottleneck or pad cadence; the post is methane-focused. Useful for Tier B (Musk's stated cadence) and Tier S/A (raw consumption math vs. EIA data) cross-reference.