With increased computational power available, we are now capable of performing transient CFD analysis of our propellers. This state-of-the-art approach allows us to get much more insight into the details of the flow around the propulsor, study its interactions with the hull and sterngear, as well as analyse the pressure variations they induce. As a basis design tool this method would be too computationally intensive to fit within the timescales of the market we operate in. However, it provides an excellent means of providing invaluable data for our unique projects, supporting the development of new propeller series and complementing our current approach when conducting the final design calculations.


Using a unique and highly complex software programme developed for CJR  at the CTO in Gdansk incorporating Lifting Surface Theory and integrated with Computational Fluid Dynamics (CFD), we are able to test our designs in a virtual world that replicates real world conditions. This enables us to gather valuable data before validating the designs using models in laboratory tests and finally in full size sea trials. The ability to electronically recreate real world conditions, and to predict performance with incredible accuracy, dramatically speeds up the design process. This ‘appliance of science’ does away with the traditional trial and error approach so typical of the industry.


We make extensive use of state of the art CNC machinery in the manufacture of our shafts and stern gear. We now have the capability to fully CNC machine our propellers on our 5-Axis machining centre; the ultimate method for reproducing a perfect finish every time and with absolute accuracy. In order to get the best out of this phenomenal machine, we have developed bespoke integration software using visual recognition technology. Much of the technology we utilise is developed in the aerospace industry where quality and accuracy are the number one considerations and compromise is simply not an option. The benefits of this dedication to research and development are many and varied, but include:-

  • Improved performance, responsiveness and manoeuvrability
  • Smoother running and quieter operation
  • Improved efficiency
  • Longer working life for the whole shaft line and drive train
  • Increased range
  • Reduced emissions
  • First trial acceptance
  • Faster turnaround from concept to reality


Get in Touch

CJR combines decades of experience with continuous investment in the latest technology and engineering prowess. Just drop us a note to find out more about how we can help you.