I believe there were some niche uses. Moving curtains, opening temple doors. Last use I know of, and you may not agree with me, was in Leonardo da Vinci's plans, whose aerial screw was to be powered by aeloplie. Let there be pipe, [![enter image description here][1]][1] smoke [![enter image description here][2]][2] and steam [![enter image description here][3]][3] [1]: https://i.sstatic.net/J1dmo.jpg [2]: https://i.sstatic.net/WrCo1.png [3]: https://i.sstatic.net/Rcr7C.png I could be wrong on this, however the drawings are made by the best artist yet, author of Mona Lisa and the man who was hired by both French king and Roman Pope to do some drawings. Since the aeliopile is closely related to rocket engines and these are more efficient in comparisson to, say, a gas engine, the question really should have been "Is the time ready for Heron's engine yet?"