Editing O'Neill Habitat Ring Seven (section)

=== Key Specifications ===

{| class="wikitable"
|-
! Parameter !! Specification
|-
| Cylinder length || 6.4 km per cylinder (×2)
|-
| Cylinder radius || 1.6 km
|-
| Interior surface area || ~128 km² (combined, usable)
|-
| Rotational period || 114 seconds (1 g equivalent at rim)
|-
| Peak residential population || ~84,000 (c. 2244 CE)
|-
| Agricultural sleeve modules || 8 (added progressively 2191–2210 CE)
|-
| Primary power || Solar mirror array (~2.4 GW equivalent)
|-
| Backup power || 6 × deuterium fusion cells (~180 MW combined)
|-
| Docking berths || 42 standard; 6 heavy-lift collars
|-
| Operational lifespan || 119 years (2191–2310 CE)
|}