Time Constant

it is because you are dealing with two realms. One is electrical and has far higher intrinsic velocities. That of light and electrons in wires are orders of magnitude larger than a lever arm or a high speed fan

Hi, there are some analogies between electrical and mechanical systems, arising from the identical form of the differential equations, for basic circuits. In this equivalence, the inductance (L) corresponds to the mass (m) and the inverse of the capacitance (1/C) to the spring constant (k). If you apply tipical values to mechanical and to electric circuits, you will see that the "time constant" of electrical circuits will be much less that for mechanicals.

Mechanical constants are relative to the mechanical work cycles.

Electrical and light are the same.

I think you can generally relate the value of an object's 'time constant' to it's mass.... the more mass (weight) it has, the slower it is to react, and the faster it damps...