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Chapter 1: Long Passage

A year out from Concordia's yard, the fusion transport turns end for end and burns against her own motion.

What it shows. Why fusion makes Saturn reachable, and why its fuel comes from Saturn.

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2:04 · 9 shots: 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

A small membrane room on a grown lattice, one shielded port aft toward the radiators. — The engine gallery A small membrane room on a grown lattice, one shielded port aft toward the radiators.

A corridor of stacked sleep cells curving up ahead, a nursery bay and a workshop opening off it. — The spin deck A corridor of stacked sleep cells curving up ahead, a nursery bay and a workshop opening off it.

Fusion light runs down the truss as the magnetic nozzle lights. — Ignition Fusion light runs down the truss as the magnetic nozzle lights.

The engineering behind it

Nuclear
Fusion propulsion and helium-3
The Long Passage burns about 370 kg of fusion fuel on a crossing, and throws nearly 4,000 tonnes of hydrogen out of her magnetic nozzle to do it.
System
Spin gravity and counter-rotation
The Long Passage turns her habitat drums once every 20 seconds, and the floor presses on your feet with 0.56 times your Earth weight.