Efficiency of block and tackle system
Input(s)
\(\mathrm{F}_{\mathrm{h}}\): Load Hoisted (lb)
\(\mathrm{v}_{\mathrm{t}}\): Traveling Block Velocity (fpm)
\(\mathrm{F}_{\mathrm{f}}\): Load in Fast Line (lb)
\(\mathrm{v}_{\mathrm{f}}\): Fast Line Speed (fpm)
Output(s)
E: Efficiency (fraction)
Formula(s)
\[
\mathrm{E}=\frac{\mathrm{F}_{\mathrm{h}} * \mathrm{v}_{\mathrm{t}}}{\mathrm{F}_{\mathrm{f}} * \mathrm{v}_{\mathrm{f}}}
\]
Reference(s)
Samuel. E Robello. 501 Solved Problems and Calculations for Drilling Operations. Sigma Quadrant. 2015. Houston, Texas, Page: 10.