So if spinning starships used to transfer fuel for less than 24 hours it doesn't count?
What if 2 hours done 12+ times?

0.01g is ok? So if a dragon capsule is slowly spun for heat management purposes does that count or fail on intent because main purpose is not creating artificial gravity?

@ChristopherRandles dragon heat roll won't count, since the intention of the roll is not to generate gravity.

At the same time, Starship spinning for fuel transfer would count as intentional, but will likely fail the duration criteria, which let's count as 24+ hours straight, otherwise it will be hard to keep track of

/OlegEterevsky/when-will-humanscale-centrifugal-ar

Does it have to be human-sized? On smaller scales this was already done, for example with the European Modular Cultivation System (EMCS) on the ISS, with centrifuges to test plant growth at g-forces between 0.001 g and 2.0 g: http://wsn.spaceflight.esa.int/docs/Factsheets/13%20EMCS%20HR%20web.pdf

@dp9000 good point. I had in mind human-sized gravity, yes. I'll update the description in a bit

@Berg The description is still not updated.

@ErwinRossen done

Does this have to be Earth force gravity, or would simulating, e.g., lunar gravity, count?

@Duncn any gravity would suffice, even a 0.01g , it just have to be generated deliberately and for a prolonged period of time.