What old technology are you surprised is still in use today?
What old technology are you surprised is still in use today?
What old technology are you surprised is still in use today?
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Steam turbines.
Like those damn nuclear reactors!
I mean, that's 20th century, or (IIRC) just before depending on the level of tech maturity you require. The 19th century ran on pistons.
Steam engines? Plenty of those ran the Industrial Revolution factories.
You said turbines specifically. Parsons invented those around the turn of the 20th century.
Before that, it was the chugga-chugga kind of steam engine. They're a lot simpler to design and machine, and don't require the really high RPMs to operate, but then again can break in many different ways a turbine can't.