Andersen 12 ST FS Self-Tailing Manual Single Speed Winch – Full Stainless

Description

12 ST FS Self-Tailing Manual Single Speed Winch – Full StainlessPower Rib™ANDERSEN Winches feature the Power Rib™. Unlike other winches with abrasive drum surfaces, ANDERSEN winch drums have vertical ribs running up the surface. This combined with the smooth polished stainless steel gives a maximum grip and minimum wear on ropes, reducing the replacements costs of sheets and halyards. What’s more, the Power Rib principle simply makes sailing more pleasurable. Fewer turns on the winch make tacking easier. Sheets may also be gently eased out without harsh snatching and the risks of overrides and jammed sheets are significantly reduced. The grip provided by the ribs will remain the same year after year, unlike many other winches with an abrasive or sandpaper-like surface. Such surfaces generally tend to wear out both ropes and themselves.Power RatioPower Ratio is the mechanical benefit of the winch and is calculated as follows:length of maintain x gear ratio
radius of drumThe pull of the winch is based on the Power Ratio and not just on the physical size of the winch or the diameter of the drum. The Power Ratio is used to resolve the load the winch may maintain as follows: pull of maintain (kg x Power Ratio = pull of winch (kg).Which means by applying a load of 10kg, the usage of a 10″ standard maintain, on a Power Ratio 40:1 winch, the winch can pull 400kg, assuming that the winch is 100% efficient. This isn’t imaginable in practice as the efficiency is reduced by internal mechanical friction losses.Specifications:Drum Ø D: 2-3/4″Base Ø B: 4-1/2″Height H: 5″Line Entry L: 1-3/4″Line Size: 5/16-9/16″Weight: 5.7lbGear ratio 1st speed: 1.3 : 1Power ratio 1st speed: 9.5 :1

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