MLC-CHG-001 — Protect 5.0 m internal MLC envelope and use ~5.4 m structural/interface pitch
accepted / propagation open
The MLC dimensional basis changed from the earlier 5 m external-cube interpretation to a 5.0 m protected internal envelope with approximately 5.4 m external structural/interface pitch. Downstream designs must be reviewed against the additional available envelope rather than merely relabeled.
| Subject | Status |
|---|---|
| Standard Intermodal Cargo System | updated |
| Earth–Mars Transportation | reviewed — no direct dimensional edit |
| Mars Shuttle / Surface-to-Orbit Transportation | reviewed — existing MLC dependency retained |
| Orbital Logistics and Servicing | updated / clarified |
| Spacecraft Architecture & Classes | updated |
| Surface Logistics System | reviewed — current MLC standard referenced |
| Colony Habitat Complex | reviewed — no conflicting external dimension |
| Deployment & Dispensers | update required |
Affected documents
| Document | Status |
|---|---|
| Small Satellite Dispenser | update required — design still uses approximately 4.6 m rack planning dimensions and should be re-optimized against the current 5.0 m protected internal envelope |
| Surface Data Center — SDC-C1 | review required — contains a 5 x 5 x 5 m enclosure requirement that must be reconciled with the protected-internal-envelope standard |
| Orbital Compute Network — OCN | review required — historical cube language is identified but downstream SDC-C1 dimensional wording still needs reconciliation |
| Mars Orbital Infrastructure Handoff | review required — historical source language is identified but should be reconciled when the handoff is next refreshed |
| Regular R10 Integrated Spacecraft | reconciled — legacy cube shorthand is explicitly mapped to the current protected internal envelope |
| Regular R5 Reference Spacecraft | reconciled — legacy cube shorthand is explicitly mapped to the current protected internal envelope |
| Regular R5/R10/R20 Heavy Deployment Cradle | reconciled — legacy cube shorthand is explicitly mapped to the current protected internal envelope; future optimization remains an engineering trade |
| Mars Satellite System Architecture | reconciled — current structural/interface pitch and protected internal envelope are stated |
| Mars Logistics Container — MLC and Modular Cargo Interface — MCI | reconciled — historical cube wording is explicitly identified as predecessor terminology |