Differences between revisions 2 and 3
 ⇤ ← Revision 2 as of 2018-10-09 00:13:47 → Size: 1219 Editor: KeithLofstrom Comment: ← Revision 3 as of 2018-10-09 00:14:07 → ⇥ Size: 1220 Editor: KeithLofstrom Comment: Deletions are marked like this. Additions are marked like this. Line 7: Line 7: $~ R = a (gees) / omega^2 = 9.8 / ( \pi RPM / 60 )^2 = 3575 / RPM^2$ meters for one gee $~ R = a (gees) / \omega^2 = 9.8 / ( \pi RPM / 60 )^2 = 3575 / RPM^2$ meters for one gee

## Centrifuge RPM

Centrifugal acceleration and RPM versus radius. Radius is to body midline for similar head-to-foot hydrostatic pressure compared to 9.8 m/s² gravity). This neglects subtle long-term Coriolis effects, besides the obvious and well-known vestibular effects of motion in a rotating acceleration field.

a = \omega^2 R ~ so ~ R = a (gees) / \omega^2 = 9.8 / ( \pi RPM / 60 )^2 = 3575 / RPM^2 meters for one gee

 RPM radius (meters) 1 3575 2 894 3 397 5 143 8 56 10 36 15 16 20 9 30 4

One paper claims vestibular adaptation to 30 RPM(!) within a week, for a limited range of motion. A conservative guess is that 15 RPM will suffice for most practical needs.

A cylinder 16 meters radius and 10 meters wide provides 1000 square meters of floor space. Three meters of polethylene shielding around that is a polyethylene volume of π (16*38² - 10*32²) m³ ≈ 10,000 m³ ≈ 9,000 tonnes of PE.

Centrifuge (last edited 2018-10-09 03:12:43 by KeithLofstrom)