Core systemSection 01 / 06

The Core Architecture

One elegant stack, engineered around hardware that already flies — designed to spin, to dock, and to be reused at every step.

Five Starships. One hub. Built to spin.

1.1 — The Vehicle

OAKHEART is built from exactly five Starship-class vehicles nose-docked to a reinforced central hub. The entire complex is designed to spin, providing continuous artificial gravity during transit.

The hub carries the primary propulsion system: nuclear thermal for Mars transfers, methalox for lunar transfers. The Starships themselves stay pure — habitat and payload only.

Vehicles
5 × Starship
Central structure
1 × reinforced hub
Docking
Nose-to-hub berth
Gravity
Continuous spin
Mars propulsion
Nuclear thermal
Lunar propulsion
Methalox cluster
The OAKHEART complex over the Moon: five Starship-class vehicles nose-docked radially around a central hub with a firing engine, above the cratered lunar surface.

Fig. 01 — Spinning complex, plan view

Why this configuration

1.2 — Rationale
01

Nose-docking

Preserves the full landing capability of every Starship — no vehicle is sacrificed to the transfer.

02

Permanent node

The central hub becomes a permanent orbital node at the destination, not disposable mass.

03

Spin gravity

Continuous artificial gravity protects crew health across long-duration missions.

04

Reconfigurable

The same physical stack takes on multiple roles without redesigning the vehicle.

Propulsion philosophy

1.3 — Propulsion
Mars transfer

Single high-efficiency nuclear thermal engine

Mounted on the hub. It performs the interplanetary burns so the five Starships never have to — they remain pure payload and habitat modules for the entire crossing.
Lunar transfer

Methalox engine cluster

For shorter lunar transfers the hub swaps to an operational methalox cluster. Same architecture, different propellant — chosen per destination and transit duration.

In both cases the five Starships are never required to perform the interplanetary burns themselves. The hub does the work; the vehicles arrive with their full landing capability intact.

Crew Health & Safety

1.4 — Crew safety

Continuous spin gives the crew steady artificial gravity for the entire crossing, protecting bone density, muscle mass, and cardiovascular health on long-duration transits. Radiation exposure is managed geometrically: the reinforced hub and stored propellant sit between the crew and the Sun, and the complex orients its densest mass toward incoming particle flux to shadow the habitats. Redundancy is built into the shape itself — any single Starship can undock and operate independently, so the loss of one module never compromises the others or the mission as a whole.

1.5 — Design principles
01Simplicity
02Reusability
03Compatibility with existing hardware
04Maximum capability per launch window
Next — Section 02

Six roles. One identical architecture.

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