aprile 2014

Taking a cruise on European rivers with SCHOTTEL


About 40 European river cruise vessels are and will be equipped with a SCHOTTEL propulsion concept with four SCHOTTEL Twin Propellers STP 200. The concept was specifically designed for river cruise ships. Since five years it has constantly gained acceptance with its numerous advantages such as low-noise, shallow draught, increased overall efficiency and energy efficient operation.

 

Through the river valley on a low-noise journey

From two to four – splitting the propulsion units from the conventional two to four Twin Propellers, reduces the draught of the ship to approximately 1.60 meters. Therefore the ships sail smoothly even in shallow waters. The highly elastic mounting of the STP effectively damps the pressure impulses induced by the blades. The reduced diameter of the propellers allows a spacious clearance between the propellers and the hull and results in a low structure-borne noise level.

 

Powerful and intelligent

The small propeller diameter of 1050mm requires only minor tunneling of the ship’s stern. In contrast to high tunnelled ships, these effective designed stern lines increase the overall propulsion efficiency significantly. Additionally, the propulsion system with four SCHOTTEL Twin Propellers 200 has a very low thrust-deduction coefficient thanks to the clearance between propeller and hull. Hence, almost the entire thrust can be converted into propulsive power.

One or two SCHOTTEL Pump Jets of the type SPJ 82 RD serve as additional drives in the bow. These are characterized by their compact and rugged design and are suitable as main and auxiliary drives.

 

Increased redundancy and operation safety

The steering of the fourfold propulsion system ensures an increased operation safety: just like a dual propulsion system the steering is controlled via two joysticks, one for the two units portside and one for the two units starboard. Apart from a few details, the bridge does not differ from a double unit. This way, captains can easily change between a fleet’s different vessels.

The operational safety of the ship itself is guaranteed by the 9-fold redundancy of the propulsion system: the four SCHOTTEL STP 200 main propulsion units each have redundant control. The SCHOTTEL SPJ 82 RD ensures the redundancy additionally.

 

River cruise companies count on SCHOTTEL

Currently the propulsion concept is available with four mechanical STP 200 in both a diesel-direct and a diesel-electric version as well as with four electric SCHOTTEL Combi Drives (SCD 200). The SCHOTTEL propulsion portfolio for river cruise ships also includes a variety of individually tailored concepts for different river cruise providers. These range from the traditional concept with two SCHOTTEL Twin propellers to river cruise vessels operating with SCHOTTEL Pump Jets as main propulsion units.