Mechanical and marine engineering science ... Specially written as a handbook to the Board of Trade examinations for extra-first-class engineers (1909)
Somerscales, A. N · Glasgow : J. Munro; London, Simpkin, Marshall, Hamilton, Kent · leaf 157
ons from the head of the derrick, what are theforces on the pole and stay and what is the bendingmoment on the mast? The head of the derrick A, infigure 55, is a point where threeforces act, as shown by arrows.Complete the parallelogram ABCDby drawing CD parallel to BA.The ratio between the sides… … Fig. SS. For the bending moment on the mast we must measure thehorizontal distance from the foot C to the line in which the weighthangs. This is found to be 15 feet. The bending moment is 5 x 15 = 75 ton feet. THE PARALLELOGRAM OF FORCES. 155 2, A ball welshing 100 lbs. hangs by a cordfrom a hook…
Naval architecture
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