The sixth Era has 7 cargo engines, with one being a bonus engine.
You can open new engines by using research points generated by the Laboratory building within your Train Station. Only when you've researched the required pre-requisites can you begin to develop the next engine. At the end of each era, a coupling system is available, allowing engines to transport goods from the next era.
Note: No passenger engines are available to research on the American Dream scenario.
Ogre
Requirements:
Research Cost: 75 Research Points
Slots: 1 | Reliability: 50% | Acceleration: 1/20 | Speed: 80 km/h | Tractive Force: 17
Phoenix
Requirements:
Research the Ogre and its Reliability upgrades.
Research Cost: 95 Research Points
Slots: 1 | Reliability: 70% | Acceleration: 2/20 | Speed: 300 km/h | Tractive Force: 13
Pegasus
Requirements:
Research the Ogre and its Tractive force upgrades
Research Cost: 50 Research Points
Slots: 1 | Reliability: 95% | Acceleration: 8/20 | Speed: 155 km/h | Tractive Force: 9
Lindworm
Requirements:
Research the Phoenix or Pegasus and their required upgrades
Research Cost: 70 Research Points
Slots: 1 | Reliability: 75% | Acceleration: 10/20 | Speed: 140 km/h | Tractive Force: 10
Hydra
Requirements:
Research the Lindworm and its Reliability & Acceleration upgrades
Research Cost: 80 Research Points
Slots: 1 | Reliability: 80% | Acceleration: 20/20 | Speed: 110 km/h | Tractive Force: 11
Olympus
Requirements:
Research the Hydra or Pluto and their required upgrades
Research Cost: 120 Research Points
Slots: 5 | Reliability: 70% | Acceleration: 18/20 | Speed: 250 km/h | Tractive Force: 45
Valkyrie (Bonus)
The Valkyrie is the Cargo Bonus Engine of Era 6. It can be bought in the Rail Nation Shop and can be won through the Lottery.
Slots: 0 | Reliability: 90% | Acceleration: 15/20 | Speed: 340 km/h | Tractive Force: 12