When & Why would you reef a mainsail?
Reefing is meant to increase your ease-of-use, flatten sail shape, reduce sail area, and re-position the boat’s center of effort. This reduces heeling and de-powers your sails to improve safety and stability in rough weather.
When should sails be flattened?
A periodic check is worth the effort. I replace my sheets every two years. The basic theory of trimming is simple: In light wind, a curved sail with lots of shape is faster, but as the wind speed increases, the sail needs to be flattened to reduce its power.
Can you reef a self tacking jib?
Reefing of the self-tacking jib is, indeed, not the best idea. When partly furled, the foot gets shorter but you can’t adjust the sheet point forward, meaning more vertical loads on the foot.
Do twin sheets control mainsail?
Registered. Separate twin main sheets are best for controlling the shape of the mainsail. Instead of moving the sheet on the traveler, you can control the fullness of the sail with twin sheets.
How tight should boom vang be?
The golden rule of thumb: Use enough vang to keep the top batten parallel to the boom. If it is too tight, the top telltale will stall. There are a few exceptions however when it comes to boom vang use.
How tight should the outhaul be?
In moderate wind, the outhaul should be moderately tight, flattening the sail and giving better shape for sailing upwind or on a reach. In a stronger wind, when you might need to depower the main to prevent excessive heeling, the outhaul should be very tight. A flatter sail produces less heeling force.
What should you do before pulling up the halyards?
First thing you want to do is unzip your sail bag and make sure the sail’s ready to go up. Number two, check your halyard. Often at night, you’ll put it around a cleat or pull it away from the mast just so it doesn’t clang. Make sure the halyard’s ready to flow smoothly and pull your sail up.
What is sail flogging?
Flogging: Flogging is the quickest way to damage a set of sails, especially membrane sails made from high-tech fibers like Carbon and Twaron. Neither of these fibers do well when they are repeatedly bent, which is exactly what happens when a sail is allowed to flog. Over time the delicate fibers will slowly fatigue.
What is a third reef?
Reef 3 is a slab reef with a line to the clew only. When I put it in I have to go to the mast to deal with the tack which is held by a big snap shackle on a dyneema strop which attaches to spectacles through the cringle.
How do you reef when sailing downwind?
There is no need to make huge course alterations in order to reef your mainsail. When sailing downwind, head up just enough to lift the back of the main clear from the spreaders. Drop your traveller to its full extent, release the kicker and ease the mainsheet a little.
What does a Cunningham do on a sailboat?
The cunningham controls the fore and aft position of draft in the mainsail or genoa and works together with the traveler, mainsheet, outhaul and vang to optimize sail shape and increase boatspeed. Cunningham controls lead to the crew to encourage adjustment as wind speed changes.