Effect of Coupling Angle of Propeller Blade and Crank of Marine Diesel Engine on First Mode Torsional Vibration (1st Report)

Abstract

The experiments were made with different coupling angles of crank and propeller blade in the two-cycle four-cylinder 800 B. IP-195 rpm marine Diesel engine directly coupled to a four-bladed propeller through a short intermediate shaft in single screw ship. The results showed that the amplitude was reduced to about half the worst coupling angle upon verious speeds, they gave the best coupling angle.