Differences between revisions 1 and 2
Revision 1 as of 2018-10-07 18:42:21
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Revision 2 as of 2018-10-09 00:13:47
Size: 1219
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|| 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 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)