Propeller Forces to Bend the Shaft

Abstract

A propeller induces the hydrodynamic forces to bend the propeller shaft when it works in the wake field of a ship, and, in consequence, care should be taken so as to prevent the bearing from the worse wear or seizure. Such forces are computed with the quasi-steady propeller theory, and also examined through some records on the deflection of a shaft and the simple analysis of a wake distribution, the way of which has been once proposed by the author. A warning is given against the wing propeller of a twin screw ship which is rotated inwards.