result is an engineered and rational propulsion shafting which
ensures a judicious sound distribution of bearing reactions along the
shafting system, with long life performance.
The propulsion shafting not necessarily has to be aligned along a
straight line. In other
words, if one draws a line between the tailshaft aft cone centre towards
the centre of the M.E. crankshaft or, the L.S. gear centre, if a
reduction box is installed, the optimum shafting, in most cases, has to
snake along that line. The
best elastic curve of the lineshaft is determined using the hydraulic
jacking method and offsetting the bearings in a trial and error manner.