Page 60: of Marine News Magazine (November 2015)

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PROPULSION “Once the unit is integrated into the vessel design, Karl Senner and Steerprop technicians analyze shafting arrangement options, and evaluate water? ow into the unit. Even small hull changes to optimize water? ow and hydrodynamics can greatly decrease fuel consumption and increase performance.” – Chris Senner the Karl Senner turnkey inland towboat would be a one- stop-shop. Chris Senner adds enthusiastically, “We can work with anyone at any stage of a given project, from new concepts to re-powers. We can supply all drive components from the ? y wheel back, including Reintjes Gearboxes,

Steerprop z-drives, and electrical components for diesel electric systems from EPD out of Houston. Furthermore, on the inland side, customers can still utilize Karl Senner for their conventional vessels equipped with gearboxes, as well as for their next generation z-drive vessels, and die- sel-electric packages. This allows our customers to have one source for all their propulsion needs.” Post-delivery,

Karl Senner provides hands-on training to operators both

The Steerprop Advantage at a glance …

Hi-Perfor- The HJ3 High Performance / High Ef? ciency Nozzle’s hydrodynamic shape provides 5-6% increased mance Nozzle bollard pull, with 10% higher ef? ciency at speed – when compared to a conventional 19A type nozzle.

Durability The HJ3 Nozzles come with a stainless steel inner surface, from the leading to trailing edge of the nozzle. Rolled and attached in one single piece, with no weld seams on the inner diameter, the lining can be up to 1” thick to allow for minimum service and repair to nozzles.

An over-sized “brown water rating” is used when sizing Steerprop units for Inland Waterways, similar

Unit Sizing to an ice class rating. The blade’s design utilizes strengthened stainless steel propellers that maintain optimum performance, but allows to run through the inevitable debris.

Overhaul Steerprop units are designed for 75,000 to 100,000+ hours between overhauls. This reduced main-

Intervals tenance interval provides Steerprop with a low cost of operation.

Housing Steerprop’s housings are steel-fabricated (not cast); more resilient to impacts, more likely to bend design than crack upon impact, easier to repair and have shown no signs of corrosion or erosion.

Short Stem A shorter stem height (distance from propeller shaft to input shaft) minimizes the distance from the

Height propeller shaft to the slewing ring. A reduced distance between components reduces axial forces on the slewing ring, creating a stronger unit.

Steerprop uses IHC Supreme 4 lip Seals on the propeller shaft seal, creating 4 separate barriers

Seal Design between lubrication and outside water. Each seal is designed for high silt/sand environments. The steering seal is a triple lip seal, does not require major disassembly or overhaul for service. Condition monitoring is offered on both propeller and steering seals.

November 2015

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