Space Age Railway Expansion: Nuclear & Fusion Trains + Rolling Stock

Space Age Railway Expansion: Nuclear & Fusion Trains + Rolling Stock

Not another vanilla train reskin. This has real new graphics and train model

Space Age Railway Expansion extends Factorio's railway progression into the late game with a dedicated Nuclear Locomotive, five Fusion Locomotive tiers, higher-capacity cargo and fluid wagons, upgraded storage tanks, Custom Mk1 & Mk2 Train Roboports, new propulsion fuels, new technologies, native upgrade progression and configurable graphics.

The aim is to make railway technology continue progressing alongside the rest of Space Age instead of leaving the vanilla locomotive and rolling stock as the final step.

Emissions are still a work in progress, still trying to get the best out of the game.

Main Features

• Dedicated Nuclear Locomotive unlocked with Nuclear Power
• Fusion Locomotives Mk1 through Mk5
• Increasing Fusion locomotive power, speed, braking and technology cost by tier
• Dedicated Nuclear Propulsion Cell
• Dedicated Cooled Fusion Locomotive Cell
• Spent Fusion Locomotive Cell recovery and reprocessing
• Productivity support for Nuclear Propulsion Cell and Cooled Fusion Locomotive Cell production
• Kovarex Axial-Flux Motors used in Fusion locomotive construction
• Cargo Wagon Mk2 and Mk3
• Fluid Wagon Mk2 and Mk3
• Storage Tank Mk2 and Mk3
• Fluid Pumps Mk2 and Mk3
• Nuclear/Fusion Mk/Cargo wagons Mk/Fluid Wagons Mk* each have their own Minimap Icons
• Mk1 & Mk2 Train Roboports - More powerful than regular. Consumes Train Fuel for power.
• Dedicated High-Capacity Logistics Mk2 and Cryogenic Logistics Mk3 research
• Native Factorio Upgrade Planner progression for Fusion locomotives
• Optional direct conversion recipes between enabled Mk levels
• Equipment grids for Nuclear and Fusion locomotives
• Configurable Exoskeleton limits
• Enable the tiers you want for locomotive, cargo wagons/fluid wagons and storage-tank tiers via mod settings
• 256-direction Fusion locomotive graphics
• Standard Detail and optional High Detail Fusion locomotive graphics
• No continuous locomotive on_tick polling

Locomotive Progression

Nuclear Locomotive

The Nuclear Locomotive provides a dedicated fission-powered railway stage and is unlocked with Nuclear Power.

It uses a heavier 3000-weight chassis, a dedicated Nuclear Propulsion Cell and its own fuel category. It is intentionally separate from the Fusion Mk upgrade chain.

When a Nuclear Propulsion Cell is fully consumed it produces a depleted uranium fuel cell in the locomotive's burnt-result inventory.

Fusion Locomotives

Fusion locomotives provide the main late-game performance progression:

• Fusion Locomotive Mk1
• Fusion Locomotive Mk2
• Fusion Locomotive Mk3
• Fusion Locomotive Mk4
• Fusion Locomotive Mk5

All five Fusion tiers use a 3000-weight chassis. Higher tiers increase maximum power, base top speed and braking force while intentionally reducing burner effectivity as a balance trade-off for the additional performance.

Locomotive Performance

The figures below are the current mod values. By default only Fusion Mk1 is enabled, update the mod settings for better versions. I did not want this to be a grind for quality, so I created dedicated versions with marked improvements. Only fuel Quality adds another peformance lever.

Fuel runtime is calculated at continuous maximum power. Trains throttle fuel use once they reach speed, so normal route endurance can be longer than these minimum/max-load figures.

| Locomotive | Max power | Efficiency | Fuel accel. | Normal-fuel top speed | Legendary-fuel top speed | Runtime / fuel item | Full fuel inventory | |---|---:|---:|---:|---:|---:|---:|---:| | Vanilla | 0.60 MW | 100% | 1.80x | 298.1 km/h | 356.4 km/h | 2m 47s | N/A | | Nuclear | 0.90 MW | 25% | 2.50x | 324.0 km/h | N/A | 37m 02s | 3h 05m 11s | | Fusion Mk1 | 2.25 MW | 50% | 3.00x | 401.8 km/h | 518.9 km/h | 0h 55m 33s | 1h 51m 07s | | Fusion Mk2 | 3.38 MW | 45% | 3.00x | 502.8 km/h | 649.5 km/h | 0h 33m 17s | 1h 06m 34s | | Fusion Mk3 | 4.50 MW | 40% | 3.00x | 603.9 km/h | 780.1 km/h | 22m 13s | 44m 27s | | Fusion Mk4 | 5.63 MW | 35% | 3.00x | 702.4 km/h | 907.3 km/h | 15m 32s | 31m 05s | | Fusion Mk5 | 6.75 MW | 30% | 3.00x | 803.5 km/h | 1037.9 km/h | 11m 06s | 22m 13s |

The Nuclear Propulsion Cell has an 8 GJ nominal fuel value and stack size 5, so one fully loaded fuel slot can hold five cells.

The Cooled Fusion Locomotive Cell has a 15 GJ nominal fuel value and stack size 2.

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Cooled Fusion Locomotive Cell Quality Performance

Cooled Fusion Locomotive Cells support Factorio quality.

Fuel quality increases acceleration and top-speed multipliers. The locomotive Mk itself remains the performance tier, while fuel quality provides an additional performance upgrade.

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| Fuel quality | Acceleration multiplier | Change vs Normal | Top-speed multiplier | Change vs Normal | |---|---:|---:|---:|---:| | Normal | 3.00x | - | 1.20x | - | | Uncommon | 3.50x | +16.7% | 1.27x | +5.8% | | Rare | 4.00x | +33.3% | 1.34x | +11.7% | | Epic | 4.50x | +50.0% | 1.41x | +17.5% | | Legendary | 5.50x | +83.3% | 1.55x | +29.2% |

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Fusion Trains Top Speed Fuel by Quality

| Fuel quality | Mk1 | Mk2 | Mk3 | Mk4 | Mk5 | |---|---:|---:|---:|---:|---:| | Normal | 401.8 km/h | 502.8 km/h | 603.9 km/h | 702.4 km/h | 803.5 km/h | | Uncommon | 425.2 km/h | 532.2 km/h | 639.2 km/h | 743.4 km/h | 850.4 km/h |