The reciprocal of coefficient of fluctuation of speed is known as ______

Explanation:

Maximum fluctuation of speed:

The difference between the maximum and minimum speeds during a cycle is called the maximum fluctuation of speed.

Co-efficient of fluctuation of speed:

The ratio of the maximum fluctuation of speed to the mean speed is called the coefficient of fluctuation of speed.

Co-efficient of steadiness:

The reciprocal of the coefficient of fluctuation of speed is known as the coefficient of steadiness.

Let \({N_1}\) and \({N_2}\) = Maximum and minimum speeds in r.p.m. during the cycle

\(N\) = Mean speed in r.p.m. \(= \frac{{{N_1} + \;{N_2}}}{2}\)

Co-efficient of fluctuation of speed:

\({C_s} = \;\frac{{{N_1} - \;{N_2}}}{N} = \;\frac{{2\left( {{N_1} - {N_2}} \right)}}{{{N_1} + \;{N_2}}}\)

Co-efficient of steadiness:

\(\begin{array}{l} m = \frac{1}{{Coeff.\;of\;fluctuation\;of\;speed}}\\ = \frac{{{N_{mean}}}}{{{N_{max}} - {N_{min}}}} = \frac{{{N_1} + \;{N_2}}}{{2\left( {{N_1} - {N_2}} \right)}} \end{array}\)