George F. Campbell
The neophyte shipmodeller`s jackstay
was stepped in the bow, supported by its shrouds, bobstay, martingale lines, etc. At the time of the American Revolution, a squaresail was often set from under the bowsprit, entailing much of the same rigging as the normal square sail plus a few guys to properly brace it. This was called a SPRITSAIL. Fig. 62.
was usually set atop the bowsprit and to it ran the fore topgallant jib and royal HEADSTAYS. The jibboom was held by a cap similar to the mast cap, and the bowsprit by gammoning other of rope or thin chain as in Fig. 63. The heel of the jibboom was originally fitted over a shaped saddle and lashed down over the bowsprit but after the introduction of iron bands and caps, a hinged iron clasp was used instead. The jibboom was invariably drawn in, when in dock, to take up less room and avoid damage.
Bobstays introduced about 1700 were heavy rope straps, but changed to heavy chains early m the 19th century and finally fitted in modern windjammers as solid iron bars. They took a very heavy strain and the chain should be much heavier than the martingale, chains, etc.
Dolphin striker or martingale
was a means of bracing the jibboom with its various headstays. Early ones were thick wooden poles bolted by iron bands to the cap but by the mid 19th century they were slender wooden ones or solid iron hooked into an eyebolt underneath the cap. The thick wooden variety had holes through them to pass the martingale stays but the slender ones had cleats on each side and eyeplates at the bottom end, Fig. 62 and Fig. 63.
For the dolphin striker, use a hard, tough wood such as maple or lemonwood. Birch is suitable, too. Some modelmakers make the striker of brass with eyes and hook cleats soldered in place. Moving up the masts, let us consider the attachment of the upper masts to the lower, the joining called the DOUBLING, the length where the two masts overlapped, Fig. 64E.
were bolted to the lower mast and had several important functions: to serve as a step for the topmast; to carry the CROSSTREES which spread the topmast shrouds; to shoulder the lower shrouds; to give the foundation to the TOP which was a platform for seamen working in the rigging or a fighting position for marines with muskets.