Block efficiency factor

Input(s)

F: Friction Factor (unitless)

$\mathrm{n}$: No. of Rolling Sheaves (unitless)

Output(s)

E: Block Efficiency Factor (unitless)

Formula(s)

$$ \mathrm{E}=\frac{\mathrm{F}^{\mathrm{n}}-1}{\mathrm{~F}^{\mathrm{n}} * \mathrm{n} *(\mathrm{~F}-1)} $$

Reference(s)

Samuel E. Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 11.