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A comment on Why wasn't the steam engine invented earlier? Part II. Parent comment

Re:Why wasn't the steam engine invented earlier? Part II by Koshkin on Friday July 15, 2022 @05:03PM (#32112794)
I does not have to be "sustained" for more than a few minutes to be called a flight.

https://fr.wikipedia.org/wiki/Deltaplane

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Re:Why wasn't the steam engine invented earlier? Part II by goto11 on Saturday July 16, 2022 @04:11AM (#32116131)
Sure, but beside the point. There are many historical examples of heavier-than-air flight (kites, gliders etc.), but without means of self-propulsion it is not very practically useful.
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