Stone Marine Propulsion is a member of the Stone Marine Group of companies. Our highly experienced staff, based at our offices in Birkenhead and Clacton are experts in hydrodynamics, metallurgy and propeller technology and how best to apply these disciplines to the propulsion systems of vessels large and small, whether commercial leisure or naval. Our principle areas of expertise cover the following activities: • Fixed Pitch Propeller design and manufacture – all sizes for Merchant & Military • Sterngear / Shaftline design and supply • Propeller research and development • Propeller analysis and performance • Propeller metallurgy • Consultancy (Hydrodynamic and metallurgical technology, investigations into ship performance, cavitation, noise and vibration)