Azimuth thruster with contra-rotating propellers combine the structure advantages of the contra-rotating propellers and the flexibility of Azimuth thruster. While providing All-directional propulsive force, the diameter of the propellers is shortened, the propulsive efficiency is improved, the vibration and noise is decreased effectively. They are mainly used in ships with special demands or with special limits, such as transportation ships, car ferries, ships for spilt oil recovery, sanitation engineering ships and others
The power range of the azimuth thruster with nozzle is from 300HP to 3200HP.
Available Certificate: CCS, BV, ABS, GL, LR, DNV, etc.
Dia of propeller
The ratio of the length and breadth can differ quite dramatically depending on the type of vessel. Common values:
A larger L/B value is favorable for speed, but unfavorable for manoeuvrability.
The length/depth-ratio. The customary values for L/D varies between 10 and 15. This relation plays a role in the determination of the freeboard and the longitudinal strength.
The breadth/draught -ratio, varies between 2.3-4.5. A larger breadth in relation to the draught (a larger B/T value) gives a greater initial stability.
The breadth / depth ratio, varies between 1.3 and 2. If this value becomes larger, it will have an unfavorable effect on the stability (because the deck will be flooded when the vessel has an inclination) and on the strength.
Should you have any preference for the lateral azimuth thruster with contra-rotating propellers, welcome to buy the quality equipment with our factory. As one of the most professional marine equipment manufacturers and suppliers in China, we will offer you good after-sale service and fast delivery.