The rotation rate of our table can be quoted in various units. The following are often used  period, revolutions per minute, or units of ‘f’, as described below:

The angular velocity of the tank, Ω , in radians per second

The Coriolis parameter (f) defined as f = 2Ω

The period of one revolution of the tank, τ, in seconds is τ = 2π/Ω

Revolutions per minute, rpm = 60/τ
Conversion table
Ω (rad/s)  0  0.25  0.5  1  1.5  2 
f=2Ω(rad/s) 
0  0.5  1  2  3  4 
τ(s)  ∞  8π = 25. 1  4π = 12. 6  2π = 6. 3  4π/3 = 4. 2  π = 3.14 
rpm  0  2. 4  4. 7  9.5  14.3  19.1 
Note that on the ‘big’ table pictured above, the digital readout is the rotation rate in `millif’: thus 1000 is a rotation rate of 1× f: the period of rotation is thus 12.6 s.