Author: Daniel G. Teleoaca – Maritime Chief Engineer Controllable Pitch Propellers (CPP) represent a sophisticated advancement in marine propulsion technology, allowing for dynamic adjustment of blade pitch to optimize performance under varying conditions. Here’s an in-depth look at what CPP systems entail, their operation, advantages, disadvantages, maintenance requirements, common issues, and safety precautions. Components of…
The winds of change are blowing in the maritime industry as it charts a course towards a greener future. The Energy Efficiency Existing Ship Index (EEXI) regulation is leading the charge, and one of the key tools in achieving compliance is optimized propeller design. In this article, we will delve into the importance of optimized…
Many of you might have often heard the discussion between Master, Chief officer and Chief Engineer with regard to vessel propeller immersion issues, due uneven load of cargo, lack of cargo or impossibility of ballasting/de-ballasting the vessel due shear forces or bending moments. This is a very serious issue as propeller immersion less than 100%…
A turning propeller is electrically insulated from the hull by the lubricating oil film in the bearings. Electrical potential is generated between the shaft and the hull and as a result the cathodic protection of the ship will not protect the propeller. Electrical potential can cause currents in the bearings resulting in pitting of the…