Propulsion (ESS)

Steam Era technology (ESS)

Introduced in Empires of the Smoky Skies
Technology of the Renaissance era

Cost 570 20xScience5
Required techs None
Leads to None
Units enabled [[Flyer (ESS) (Civ5)|Flyer (ESS)]]
Buildings enabled None

Enables Flyer (ESS)

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"To invent an airplane is nothing. To build an airplane is something. But to fly... is everything."
–Ferdinand Ferber