... As the bevel gear is the size-determining key element within the upper and lower gearboxes of an azimuth thruster, there is a significant trickle effect onto many downstream features of the overall system. As part of its research programme, SCHOTTEL has developed a unique and major improvement...

... at the outer radii while the common back-skew increases it. Forward-skew has by now been applied with good results to axial propeller-type and mixed-flow pump impellers, an advanced water jet's impeller and several ducted thrusters. Finally, it has been applied to a ducted, CRP main propulsion screw...

... Ocean-going vessels use oil lubrication in the tunnel thrusters. Offshore vessels also use oil lubrication in the azimuth thrusters. Oil leakage from the thrusters is a serious environmental issue in these vessels. In this paper, a water-soluble, environmentally preferable lubricant newly...

... The majority of thrusters used for the position control of tethered underwater vehicles have asymmetric propulsion characteristics. This paper presents the results of a hydrodynamic design optimisation of a bi-directional integrated thruster. A surface panel method using the perturbation...

... Contemporary propulsors in tubes (waterjets, nozzles, side thrusters) are relatively cumbersome and definitely stem from simpler unshrouded installations. For shrouded installations, tip-driving is almost a natural solution. Although a novel concept, Mechanical Tip-Driven Propulsor (MTDP...