The 4 ASD pulls will certainly each be outfitted with 2 Schottel Rudderpropellers
NOVEMBER 2, 2018– The 4 Yard Tug 808-class harbor tugboats purchased from Anacortes, WA, shipbuilder Dakota Creek Industries (see earlier story) will certainly each be outfitted with 2 Schottel Rudderpropellers.
The azimuth thrusters include the DNV-GL-certified LEACON securing system and also Schottel ProAnode incorporated right into a high-efficiency nozzle.
Like 6 Navy pulls outfitted with Schottel Rudderpropellers purchased previously, the UNITED STATE Navy presently intends to release the 4 brand-new move UNITED STATE armed forces bases in the Pacific Northwest Region and also Yokosuka,Japan They are planned to do ship-handling tasks for the complete series of U.S/ Navy surface area battleships and also submarines. For this function, the pulls are outfitted with a considerable variety of undersea fendering in addition to regular resistant design fenders for taking care of surface area ships.
Provided with confirmed Schottel Rudderpropellers
The major propulsion for the Robert Allan Z-Tech layout pulls is offered by 2 Caterpillar PET CAT 3512E engines– each ranked at 1,350 bkW at 1,600 rpm and also each including a Schottel SRP 340 (previously SRP 1012) azimuthing demanding drive device with 2,100 mm size dealt with pitch props and also an input power of 1,330 kW. This mix will certainly offer a bollard pull of 43 tonnes and also a free-running rate of roughly 12 knots.
High- efficiency nozzle, ProAnode, LEACON securing system
The 4 brand-new harbor pulls will certainly be outfitted with cutting edge modern technologies created bySchottel The high-performance nozzle SDV45 supplies provable greater performance at open-water rate incorporated with excellent bollard pull worths. In enhancement, relocating the setting of the anode from the outdoors surface area right into the cross-section of the nozzle, Schottel’s ProAnode prolongs the life process of the thruster and also secures the anodes versus outside influences. Furthermore, the plan supplies added functional capacity as it adds to the optimum hydrodynamic circulation of the nozzle. Since its smooth total surface area decreases circulation disturbance, reduced gas intake will certainly settle in regards to lowered operating expense.
Thanks to different seals on the salt water side and also on the transmission side, the Schottel LEACON securing system makes certain that salt water going into the system and also equipment oil leaving from the system are gathered in an intermediate chamber. The securing system avoids water from going into the transmission and also, specifically, oil from leaving right into the salt water. This indicates that Schottel systems with LEACON are currently excluded from the present VGP laws of the UNITED STATE Environmental Protection Agency.
The pulls are anticipated to get in procedure beginning in November 2019. The Navy’s agreement with the shipyard consists of alternatives for 2 additional pulls.
