This method of building a ship, however, required considerable skill. Shear stiffness between planks would have depended upon achieving a simultaneous fit of the tenons in their mortices and therefore great accuracy in marking and cutting. In the 40m-long hulls of oared ships, tenons can be calculated to have been heavily loaded, crushing them across the grain, the direction in which timber is weakest. Tenons, however, were made of a selected hardwood, usually Turkey Oak (quercust cerris) which can carry a particularly high stress in that direction without being crushed. Tenons were also thicker in long ships, to judge from the only one so far found, near Marsala, in which they were 10mm thick, compared with 5mm commonly found in shorter, rounder merchant ships. When set very closely along a seam, tenons were often placed alternately nearer one side of the plank and then the other.
Название: The Age of the Galley - Mediterranean Oared Vessels since Pre-classical Times
Автор: Editor: R.Gardiner
Издательство: Chartwell Books Inc.
Год: 2000
ISBN: 0-7858-1268-7
Язык: english
Страниц: 257
Формат: pdf
Размер: 155 MB
