4:1 mainsheet system with 60 mm blocks and 25 meters of spliced Liros Hercules rope Ø 10 mm
ROPE PURCHASE SYSTEMS
When sailing, there are a wide range of lines and trim systems that must be able to handle sails optimally. Here, the purchase and aids must be carefully balanced so that you can pull quickly enough and with the right amount of force. Creating a purchase on a rope is just like adding a gear ratio. Every time you add an extra gear, it becomes easier to pull, but you have to pull a correspondingly longer distance to achieve the same effect as before.
MAINSHEET PURCHASE
A mainsheet is used to control the mainsail boom. There are many ways this can be handled, but on smaller boats, you most often see a so-called triple block at each end. One on the boom and one on the cockpit sole or the traveler in the boat. The bottom one has a cam cleat attached, so that the rope can be locked.
OTHER PURCHASE SYSTEMS
Other places where you often use purchase systems can be on the backstay or the boom vang. Here, it again depends on what fittings you have available and what force is required.
