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Mast furling systems avoid the issues of boom furling, but add their own issues. Mast furling systems essentially eliminate the possibility of battens, as vertical battens are not practical. Without battens, the mainsail must be cut with a hollow leech, like the typical jib, which reduces the sail area. Mast furlers also add mass all along the ...
Guyed steel lattice mast 100 Aircraft collision Hit by a B-29. [4] Ochsenkopf, West Germany January 1958: Guyed steel tube mast 50 Ice Replaced by concrete tower KAYS-TV Tower, Hays, Kansas: May 29, 1959: Guyed steel tube mast 224 Storm with 105 kt winds [5] Top 150 m of the tower toppled. Replaced within three months by a mast 251 m tall.
Many mast-aft rigs utilize a small mainsail and multiple staysails that can resemble some cutter rigs. A cutter is a single masted vessel, differentiated from a sloop either by the number of staysails, with a sloop having one and a cutter more than one, or by the position of the mast, with a cutter's mast being located between 50% and 70% of the way from the aft to the front of the sailplan ...
A masthead rig on a sailing vessel consists of a forestay and backstay both attached at the top of the mast. [1] The Bermuda rig can be split into two groups: the masthead rig and the fractional rig. The masthead rig has larger and more headsails, and a smaller mainsail, compared to the fractional rig.
[1] [2] A running backstay runs from each lateral corner of the stern to the mast at the level where the forestay begins in the fractional rig. Because they are attached low on the mast, they can present a significant problem in an accidental gybe , as the boom hits the stay, with the possibility of breaking the boom, mast, or both.
Roller reefing also allows more variable sail area than conventional or jiffy reefing. Countering these advantages are the furled sail possibly not having an optimal shape and sail repair or replacement being more difficult. In-mast roller-furling mainsails are not conducive to good sail shape. [3]
In most cases the sail can be full battened and has virtually infinite reefing options. Some sailors consider this approach safer than in-mast furling, since the sail can be lowered and flaked in the traditional method, in the case of mechanical failure. In most applications, the sail can be lowered or reefed from the cockpit.
On a sloop, there is a single forestay that runs from the top of the mast forward to the prow, and in addition to bracing the mast it provides a firm support to which a jib can be attached. When this forestay is covered with a roller-furling jib, which cannot be quickly removed, it becomes impossible to attach a different sail to the same stay.