Sea trial data from the Croswait / Bad Company 50, which is fitted with our fully CNC-machined Class S propellers, flow-aligned rudders, and flow-aligned struts for optimum efficiency and performance: LOA 50 Beam 16 Dry Weight 32,600 pounds- fighting weight 40k Cruise 30 at 1925RPM. 29 Gal a side Cruise…
Making winners
For the second year in a row, a boat fitted with CJR gear has scooped the $$multi-million top spot at the White Marlin Open. We send huge congratulations to Duffie Boatworks’ 64′ Billfisher, which took home a staggering $3.9million prize after landing a 72 pound White Marlin. Here’s what Captain…
Chat to us at Cannes Yachting Festival 9-14 September
Meet our team at Cannes Yachting Festival and ask us how our technical approach can support your next project. Our Technical Sales Director, Alex Stevens, and the team will be exhibiting in The Pantiero area of the show from 9th to 14th September. Come along to say hello and chat…
What is the best propeller system?
What is the best propeller system? Fixed pitch, or other? If you ask Chat GPT what is the best propeller system, it will tell you: “No single propulsion system is universally optimal. Selection should be application-driven, balancing efficiency, control, and lifecycle costs” At CJR, we agree. Our fixed pitch propellers will…
GOING LARGE
CJR Propulsion can now design and supply larger propellers, like this pair of 1.8m 5-blade propellers, which are leaving the factory this week and are destined for a 55m superyacht currently undergoing a refit. Using the latest CFD tools, our experienced team will identify the optimum bespoke propeller design for…
CJR Celebrates 10 years of Designing and Manufacturing Flow-Aligned Propellers
CJR Propulsion is celebrating 10 years since designing and manufacturing their first flow-aligned rudder system. Technical Sales Director, Alex Stevens, explains: “Back in 2014, this technology, also referred to as twisted rudders, was only being utilised by larger ships to improve efficiency. However, when a customer told us they needed…
How to choose a propeller: comparison trial data case study
The way a propeller is designed and manufactured can significantly improve speed and increase ride comfort. It can also reduce long-term costs thanks to lower fuel consumption and an extended working life. The case study below compares CFD-designed CNC-machined Class S propellers against hand-finished Class 1 propellers, so you can…
CJR Propulsion partners with Wingate Marine to deliver experienced on-the-ground technical support
CJR Propulsion has partnered with Wingate Marine to deliver experienced on-the-ground technical support for their customers on the West Coast. Alex Stevens, CJR Propulsion’s Technical Sales Director, said: “I’m delighted to work with Wingate Marine as our West Coast Master Distributor. It means we can be confident our customers in…
How to increase boat speed: Benefits of using flow-aligned rudders – a case study
When included as part of a fully optimised propulsion package, well-designed rudders can have a notable impact on maximising boat speed. They can also reduce fuel consumption, noise, vibration, and cavitation levels. Why? Although traditionally motor yacht rudders are straight, they operate in an area of uneven water flow directly…
How to choose the right propeller for your workboat or superyacht
The right propulsion system is key whether your priority is achieving optimum speed, improving fuel efficiency, reducing lifetime costs, or enhancing comfort. To help you source the best available system, we’ve put together this quick list outlining what questions you should be asking your propeller supplier. The propulsion and sterngear…