CJR Propulsion Brochure
13Pages

The W or l d ’s F ine s t Pr opulsion & Sterngear Systems

Welcome to a World of Possibilit y Image courtesy of Princess Yachts International plc

Picture © Sunseeker International Ltd design looks When your customer takes delivery of their yacht they want the ride, power and performance to be as exhilarating and rewarding as they dreamed it would be. CJR have been playing their part in fulfilling this promise for over 50 years. Our dedication to advanced propeller design, craftsmanship and engineering excellence have made us the sterngear suppliers of choice for some of the most prestigious boat builders in the business.

This is also what design looks Our R&D and investment in the most advanced design and manufacturing techniques mean that every prop and sterngear system we supply is the perfect match to the needs of the commercial vessel. From pilots to fishing boats, naval patrol boats to ferries, optimized propulsion means the power you want with the fuel efficiency you need.

FLUID DYNAMICS Fluid Dynamics lie at the heart of efficient propulsion and smooth power delivery. That’s why we have invested so heavily in this specialist field and are now one of the world’s foremost authorities on Computational Fluid Dynamics (CFD), consulting on projects around the world. Our advances in flow modeling and Finite Element Analysis (FEA) enable us to precisely model sterngear in use, accurately assessing lateral forces and stress as well as water flow around the propellers and their interaction with the hull and sterngear. On superyachts and commercial vessels alike, CFD...

Once you’ ve told us about TONNAGE horsepower & perform ance… Our role at CJR is to work in harmony with designers, naval architects and builders to achieve the performance and experience that the private or commercial customer is looking for. With performance at the heart of every one of our propeller and sterngear solutions, we continuously push the boundaries of CFD and Finite Element Analysis (FEA) software. We also develop our own CAD/CAM software and 3D modelling systems to help us achieve maximum efficiency with the least possible weight and drag. Picture © Sunseeker International...

MOULD… All aspects of our sterngears’ manufacture takes place in house, ensuring that the highest quality and attention to detail are maintained in every aspect of manufacture. We combine three generations of craftsmanship with the science of sophisticated flow-test software to model and control how molten metal will flow and cool in the mould, ensuring that our designs are faithfully replicated in production. M E T A L Developing our own unique metal composite gives us ultimate control of how the finished product behaves. This is just one example of why all aspects of our sterngears’...

Our propellers and propulsion systems are a combination of progressive design and manufacturing technology combined with the skill borne of three generations of craftsmanship in creating propellers and sterngear. 

 In addition, every facet of our operation, strength through from new materials to new technology is constantly reviewed and refined. As an example, our engineering department has had a new investment of over £3million to add state of the art precision to the experience, skill and attention to detail of our engineering teams. Significant investment throughout our design and...

Precise Modelling Products are designed and their performance analysed using computational fluid dynamics (CFD) and tested for strength using finite element analysis (FEA). Once the design is complete and fully optimised to its application, we move from design to physical concept before going into production. Our in-house prototyping, using one of the world’s largest 3D printers, precisely replicates the design to within a few microns and produces models in a fraction of the time conventional tool and pattern making would take. When it comes to manufacturing the highest-performing...

Image courtesy of Princess Yachts International plc turn with Stern Tubes Through-hull Logs Propeller shafts Cast rudders are made using our precision tooling and cast in either Aluminium Bronze or High Tensile Bronze. We also manufacture fabricated rudders in a variety of different materials. Manufactured from GRP, Aluminium, Steel or Bronze these are supplied fully machined and, where appropriate, fully assembled. Standard sized items can be supplied from stock. Cast in Aluminium Bronze or High Tensile Bronze which are highly resistant to corrosion, the logs are supplied with water...

yacht Our new generation propellers are high precision works of engineering that are shaped by the latest hydrodynamic modelling and tested in cavitation tanks to be the best possible match to your motoryacht or commercial vessel. up the PROPS Propellers are usually cast in Aluminium Bronze, CNC machined, dynamically balanced and prop scanned to achieve the Classification Society Standard that is required for your vessel. Infinitas, Design: Schopfer Yachts, LLC Naval Architect: Sparkman & Stephens Image: Tangram 3DS All propellers are designed for optimum performance and manufactured for...

Whet her your yacht or commercial vessel uses our propellers and stern gear or not, we can help you improve your ship's performance, reduce fuel consumption and minimise vibration with our TrialDAS system. Our portable data acquisition system gathers accurate numerical data during sea trials on trim, roll, vibration, heading and speed. It accurately gathers digital data on all aspects of the boat's performance and shows us where improvements can be made. Using this data we can tune the propulsion system to its optimum for the individual yacht and prove the results with follow-up testing....

CJR Propulsion Ltd 70-72 Quayside Road Bitterne Manor Southampton S018 1AD United Kingdom Telephone: +44 (0)23 8063 9366 or +44 (0)23 8022 2032 Fax: +44 (0)23 8021 1832 E-mail: info@cjrprop.com www.cjrprop.com