Differences between revisions 3 and 4
 ⇤ ← Revision 3 as of 2018-10-09 00:14:07 → Size: 1220 Editor: KeithLofstrom Comment: ← Revision 4 as of 2018-10-09 03:10:58 → ⇥ Size: 1056 Editor: KeithLofstrom Comment: Deletions are marked like this. Additions are marked like this. Line 9: Line 9: || RPM || radius (meters) |||| 1 || 3575 |||| 2 || 894 |||| 3 || 397 |||| 5 || 143 |||| 8 || 56 |||| 10 || 36 |||| 15 || 16 |||| 20 || 9 |||| 30 || 4 || || RPM || 1 || 2 || 3 || 5 || 8 || 10 || 15 || 20 || 30 |||| radius (meters) || 3575 || 894 || 397 || 143 || 56 || 36 || 16 || 9 || 4 ||

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