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Class S Propellers and Sterngear
CJR Propulsion Ltd is a world leader in the design and manufacture of fully machined Class S propellers and sterngear. CJR can supply complete packages, including Flow Aligned Sterngear packages consisting of p-brackets, propellers and rudders which are CFD designed to minimise appendage drag. All parts are designed and manufactured in Southampton, UK. Investments of £4m in robotics and CNC machines gives us the ability to manufacture Class S propellers in as little as 2 weeks
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3D Scanning at CJR
CJR using state of the art technology
CJR using state of the art technology
CJR offers 3D scanning as part of its portfolio. Used as part of the design, manufacturing and inspection process CJR are now using 3D scanning for reverse engineering of product plus compliance checking of product.
Flow Aligned Sterngear
CFD designed Flow Aligned p-brackets and rudders t
CFD designed Flow Aligned p-brackets and rudders t
CJR's CFD designed Flow Aligned Sterngear packages are optimised to reduce appendage drag and improve the inflow into the propeller. The system has been successfully been fitted to a wide range of boats, including production motoryachts, superyachts, sportsfish boats plus commercial vessels. Gains of up to 2kts have been achieved when the system is fitted to a 40kt production motoryacht
Class S Propellers
Fully CNC machined Class S propellers
Fully CNC machined Class S propellers
CJR Propulsion has developed a patternless casting method in conjunction with CNC machining to manufacture Class S propellers. Back to back trials with hand finished propellers have shown potential reductions in vibration levels of 50% plus fuel savings of 8-10%. The technology also allows to to manufacture bespoke propellers in as little as 2 weeks meaning less downtime for our customers.
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