The first Era has 3 passenger trains named after animals 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.
Whale
Requirements:
Research the Raven
Research its Max. Speed upgrade
Research Cost: 30 Research Points
Slots: 1 | Reliability: 85% | Acceleration: 2/20 | Speed: 95 km/h | Passengers: 35
Greyhound
Requirements:
Research the Falcon
Research its Acceleration & Tractive force upgrades
Research Cost: 35 Research Points
Slots: 1 | Reliability: 60% | Acceleration: 20/20 | Speed: 190 km/h | Passengers: 30
Dragonfly (Bonus)
The Dragonfly is the Passenger Bonus Engine of Era 1.
It can be bought in the Rail Nation Shop and can be won through the Lottery or by entering competitions in Era 2
Slots: 0 | Reliability: 100% | Acceleration: 15/20 | Speed: 170 km/h | Passengers: 40