Q, Quality factor

Q, Quality factor

Q is the energy that is stored in a pendulum divided by the energy that is dissipated during every period of oscillation:

Its maximization is an important prerequisite for the construction of an accurate clock. In a typical pendulum clock, It can be obtained using a high mass bob (great stored energy) aerodynamically shaped (low air resistance and consequently small lost energy per period of oscillation).
A high value of Q means a reduction of the force used to keep the pendulum in motion. Any slight variation of this force disturbs the oscillation. Reducing the applied force, its control is improved and this increases the clock stability. Furthermore, other energy losses deriving from friction in the escapement motion are minimized.

The exposed material is for information purposes. It can be distributed as long as it is made clear reference to the sources from which it comes: original author, Horological Journal, British Horological Institute ed Antica Orologeria Zamberlan.