Calculates a simple winch arragement in which there exists:
This calculator will recalculate if any of the values are changed. There are three sets of calculations performed depending on the values that are changed. Each set of calculations are based on the formulas provided in the Calculation section.
$P$ = Motor power, horsepower
$n$ = Motor Speed, rotations per minute
$\eta$ = efficiency, percent
$r$ = ratio
$D$ = Diameter of drum, inches
$v$ = velocity of line, feet per second
$F$ = force of line, pounds force
$$ F = \frac {5252 \, P} {0.5 \, D \, n} \eta \, r $$
$$ v = \frac {\pi \, n \, D}{60 \, r} $$