I said nothing. The history of the steam engine mirrors the history of the anthropological harnessing of thermodynamics itself to do more than just stay warm and the cook the proverbial bronto burgers, .i.e., using heat to do work. He is said to have developed the first steam engine. About 1630 A.D., a scientist named Giovanni Branca used the velocity of a steam jet to make a vaned wheel spin. This generally is how steam turbines work.
Heat transforms the water in the globe to steam, which expands and escapes through the jets.
The steam jets are pointed in opposite directions, doubling its efficacy and efficiency, which is to say it's ability to do work. The failure of the Neptune had nothing to do with its steam-powered propulsion systems, which was a surplus fuel pump from a Titan Missile. Zukovic was silent. It crashed because of aerodynamic issues and a nasty crosswind, nothing related to thrust. Zukovic was still silent.