Ground rotating-room and centrifuge studies

Summary of what the thread established

  • Pensacola / Brandeis (Graybiel; Lackner & DiZio).
  • Coriolis limits: 1 rpm, 2–3 rpm, 4–6 rpm with adaptation; Lackner & DiZio reached 10 rpm stepwise Paul451, 2015-02-21; Paul451, 2018-07-13.
  • The Brandeis rotating-room video Coastal Ron, 2019-04-04.
  • Limiting head motion harms adaptation, because early repeated movement is critical. This explains inconsistent early spin research Paul451, 2023-04-19. Unresolved short-radius issues remain LMT, 2023-04-19.
  • The deaf participant had no discomfort Lampyridae, 2016-01-13.
  • Data quality.
  • Paul451: tolerance data are inconsistent (effects at 2 rpm; no adaptation at 4 rpm even for pilots; up to 10 rpm stepwise), so effectively there is no usable data Paul451, 2016-01-18.
  • Earth rotating rooms all run at >1 g total; vomit-comet sessions (~30 s) can't measure adaptation Paul451, 2015-02-22.
  • The 1 rpm limit from 1960s experiments was later debunked high road, 2015-03-11.
  • Short-radius centrifuges.
  • A University of Kentucky thesis (2.54 m and 8.33 m radius): blood pooling in the legs and abdomen, at 1.4–1.6 g total docmordrid, 2015-03-31; Paul451, 2015-03-31.
  • A short-arm centrifuge is an effective countermeasure for bed-rest deconditioning Lampyridae, 2016-01-18.
  • An Earth centrifuge (horizontal spin + 1 g) differs from rotation in space darkmelmet, 2019-03-19.
  • Habituation is retained ≥30 days; ground pre-training is possible; ~5 rpm is the minimum most adapt to (James Engle, AIAA-2017-5139) Lampyridae, 2018-07-13.
  • Theodore Hall's comfort chart mikelepage, 2014-03-22.

Open questions

  • Do adaptation results from Earth rotating rooms (>1 g total) transfer to sub-1 g stations?

Sources

Forum posts

  • mikelepage, 2014-03-22 (reply #245): Hall comfort chart. Post.
  • Paul451, 2015-02-21 (reply #348, 2 likes): Rpm limits (2 likes). Post.
  • Paul451, 2015-02-22 (reply #360): Earth rooms >1 g. Post.
  • high road, 2015-03-11 (reply #505): 1 rpm limit debunked. Post.
  • docmordrid, 2015-03-31 (reply #556, 1 like): UKY thesis. Post.
  • Paul451, 2015-03-31 (reply #559): Total g. Post.
  • Lampyridae, 2016-01-13 (reply #817): Deaf participant. Post.
  • Paul451, 2016-01-18 (reply #830, 1 like): Data inconsistent. Post.
  • Lampyridae, 2016-01-18 (reply #831, 1 like): Short-arm centrifuge. Post.
  • Paul451, 2018-07-13 (reply #912): 10 rpm stepwise. Post.
  • Lampyridae, 2018-07-13 (reply #915, 1 like): Habituation retained. Post. Attachments: ScreenShot_20180713114209.png.
  • darkmelmet, 2019-03-19 (reply #1356): Earth vs space. Post.
  • Coastal Ron, 2019-04-04 (reply #1469, 6 likes): Brandeis video (6 likes). Post.
  • Paul451, 2023-04-19 (reply #3619): Head motion matters. Post.
  • LMT, 2023-04-19 (reply #3620): Short-radius issues. Post.

External references

  • Lackner, J. R. & DiZio, P., rotating-room adaptation studies (Brandeis).
  • Hall, T. W. "Artificial Gravity and the Architecture of Orbital Habitats" (spacefuture.com).