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 122
n ordinary marineengine shafts, it is necessary, if they are to be balanced, to fijf;weights upon the crank webs. Each crank requires a weight uponeach web or we get the rocking action. A three-throw shaft canbe balanced perfectly by weights upon one web of each of thenumber i and 3 cranks alone if… … Fig. 32- It is the reciprocating parts of an engine—the piston, pistonrod, and connecting rod—which cause the most trouble whenunbalanced. The need for balancing these parts becomes evidentwhen we consider that the rapid motion of the piston and rods athalf stroke has to be arrested by the time the…
Naval architecture
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