Manson’s giant hopper dredge will have Schottel propulsion solution

Written by Nick Blenkey
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Dredge will be largest hopper dredge in U.S.

Currently under construction at the Keppel AmFELS shipyard in Brownsville, Texas, Manson Construction Company’s 15,000-cubic-yard capacity, 420 foot long, hopper dredge Frederick Paup is to be equipped with three Schottel type SRP 510 L FP RudderPropellers.

“The Frederick Paup will set a new benchmark in the U.S. hopper dredge market,” says Jordan Brown, project manager at Manson Construction. “The innovations include many aspects of improved ship design as well as specific demands regarding automation, machinery, and equipment. Schottel was able to meet these requirements as the thrusters will optimally support our vision of top performance in terms of mounting, thrust and maneuverability.”

The dredge has been designed in collaboration with naval architecture firm Hockema Whalen Myers Associates Inc. Schottel says that the well-elaborated hull design concept allows for the propulsion system to be integrated in an exceptional manner. The aft appendages are optimally tailored to the rudder propellers in order to supply the thrusters with the lowest-possible turbulence flow. The three Schottel RudderPropellers are powered by diesel-electric drives and feature propeller diameters of 2.8 meters and a power intake of 2,240 kW each. A particularly long propeller arm length allows for an arrangement at the stern in portside, center and starboard positions with convenient access for future maintenance.

The 360-degree-steerable RudderPropellers will enable the Frederick Paup to always benefit from maximum maneuverability, outstanding course stability during free sailing, and powerful thrust in the chosen direction. Featuring nozzles with ProAnode enhanced corrosion protectioe, the RudderPropellers will be equipped with the DNV-GL type-approved Schottel LeaCon sealing system. Considered a non-oil-to-water interface, the system complies with the U.S. EPA’s VGP regulations.

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