ADVANCED HIGHLY EFFICIENT MARINE PROPULSION SYSTEM

The Castoldi “Turbodrive 490 H.C.” is not only what is led to all the experiences gained since 1955 with the supply of more than 30.000 water jet units all around the world. TECHNICAL SPECIFICATIONS INPUT FLANGE: SUITS UP TO 9,84˝ (250 MM) DIAMETER DRIVE SHAFT FLANGE IMPELLER TYPE: THREE BLADES, SINGLE STAGE, AXIAL FLOW IMPELLER DIAMETER: 490 MM - AT THE INLET It is the outcome of specific intensive research and development activities begun in 1985 aimed to further improve the high efficiency of the Castoldi waterjet drives and pursued trough self propulsion trials (of really No. 24 scale models)...

1 • Input shaft WATER JET UNIT 2 • Combined set of oil lubricated radial-axial bearings 3 • Gear box with n. 20 gear weels ratio available for the best engine matching 4 • Radial oil lubricated roller bearings 5 • Hydraulic oil pump directly mounted on the input shaft for water jet unit control (steering, reversing, hydraulic multi disc clutch and intake cleaning) 6 • Inspection hatch for impeller, duct and inlet grid inboard inspection 7 • Hydraulic actuator for steering control 8 • Hydraulic actuator for reversing control 9 • Impeller housing easy replaceable titanium wear ring 10 • Axial flow...

BENEFITS 930 ✔ The highest efficiency in the 25 to 60 knots speed range ✔ Higher top speed versus subcavitating propellers and consequent better fuel economy (from 25 knots, up) ✔ Acceleration 582.5 PERFORMANCE 903 ASSE MOTORE INPUT SHAFT ✔ No interference in multiple installations ✔ Jet power absorption insensitive to boat speed means constant jet thrust at boat drag variation ASSE ELICA 320 12° IMPELLER SHAFT SAFETY ✔ Absence of open rotating blades ✔ Absence of any appendage under hull 1462 1524 ✔ Unrivalled emergency crash stop capability ✔ Minimal damage susceptibility to floating debris...