EZ
Virtual Tools | Marine
Hub
Petroleum
All Calculators
Winch
Sizing
Calculator
Calculate required winch power ratio for sheet loads and hand cranking effort
Input Parameters
Sheet Load (lb)
Max Crew Effort (lb)
Winch Handle Length (in)
Drum Diameter (in)
Calculate
Results
--
Required Power Ratio
--
Gear Speed
--
Wraps Needed
--
Suggested Winch Size
Reference
Power Ratio = Sheet Load / Max Effort Mechanical Advantage = Handle Length / Drum Radius Capstan friction: F_hold = F_pull × e^(μθ)