A jibboom (also spelled jib-boom) is a spar used to extend the length of a bowsprit on sailing ships. [1] It can itself be extended further by a flying jib-boom. [1] The heel (i.e. rear and lower) end of the flying jib-boom is attached to the jib-boom, and the heel of the jib-boom to the bowsprit. The point (i.e. higher and fore end) of the flying jib-boom is generally the fore-most extent of a ship. The jib- and flying jib- booms carry the tacks of the jib and flying jib sails, respectively, and the stay for the fore topgallant mast and the royal stay.
In yachts it is a boom attached to the foot of the jib, to keep the shape of the sail in different wind angles and to allow self tacking.
The jib-boom is—as the name suggests—the boom for the jib, extending its foot. [1] On smaller, merchant, sailing ships, it is commonly attached to the bowsprit by a cap and a saddle, either lashed down or secured with a crupper chain. [1] [2] [3] Alternatively, it can be attached by a boom iron and a cap, or even by two boom irons. [3] The cap and saddle allow it to be withdrawn aft along the bowsprit as a ship enters harbour, reducing the opportunity for passing ships to glance against it and snap it off from the bowsprit. [3]
It is octagonal in cross-section at its heel end. [4] If secured by a chain to the bowsprit, it is iron-scored at the heel. [4] At its point it is also (partly) octagonal in cross-section, the same as is the boom iron that secures the flying jib-boom to it. [4] The flying jib-boom lies against the upper starboard side of the octagon. [4]
The stay of the fore topgallant mast is attached to the jib-boom at the extremity of its point. [1] [4] [5] The stay for the jib sail is attached to the shouldering at its heel. [4] Just as the bowsprit has bobstays, in order to counteract the upward force from the jib and fore topgallant stays a martingale hangs down from the point of the jib-boom to a dolphin striker, pulling downwards on the jib-boom. [6]
The flying jib-boom is secured, at its heel end, to the jib-boom by a boom iron and lashing. [1] At its point, it has a sheave for the royal stay. [4] [5] Another sheave at the heel is for a heel rope. [4] It is to the point that the tack of the flying jib sail is drawn out. [3]
A jibboom (also spelled jib-boom) is a spar used to extend the length of a bowsprit on sailing ships. [1] It can itself be extended further by a flying jib-boom. [1] The heel (i.e. rear and lower) end of the flying jib-boom is attached to the jib-boom, and the heel of the jib-boom to the bowsprit. The point (i.e. higher and fore end) of the flying jib-boom is generally the fore-most extent of a ship. The jib- and flying jib- booms carry the tacks of the jib and flying jib sails, respectively, and the stay for the fore topgallant mast and the royal stay.
In yachts it is a boom attached to the foot of the jib, to keep the shape of the sail in different wind angles and to allow self tacking.
The jib-boom is—as the name suggests—the boom for the jib, extending its foot. [1] On smaller, merchant, sailing ships, it is commonly attached to the bowsprit by a cap and a saddle, either lashed down or secured with a crupper chain. [1] [2] [3] Alternatively, it can be attached by a boom iron and a cap, or even by two boom irons. [3] The cap and saddle allow it to be withdrawn aft along the bowsprit as a ship enters harbour, reducing the opportunity for passing ships to glance against it and snap it off from the bowsprit. [3]
It is octagonal in cross-section at its heel end. [4] If secured by a chain to the bowsprit, it is iron-scored at the heel. [4] At its point it is also (partly) octagonal in cross-section, the same as is the boom iron that secures the flying jib-boom to it. [4] The flying jib-boom lies against the upper starboard side of the octagon. [4]
The stay of the fore topgallant mast is attached to the jib-boom at the extremity of its point. [1] [4] [5] The stay for the jib sail is attached to the shouldering at its heel. [4] Just as the bowsprit has bobstays, in order to counteract the upward force from the jib and fore topgallant stays a martingale hangs down from the point of the jib-boom to a dolphin striker, pulling downwards on the jib-boom. [6]
The flying jib-boom is secured, at its heel end, to the jib-boom by a boom iron and lashing. [1] At its point, it has a sheave for the royal stay. [4] [5] Another sheave at the heel is for a heel rope. [4] It is to the point that the tack of the flying jib sail is drawn out. [3]