The purpose of the Hydro Spoiler is to optimise water flow towards the rudder. A spoiler is placed behind the propeller, exactly on the centreline. The curved blades catch the outflowing water of the propeller and bend it from a swirling into a straight-outgoing flow towards the rudder, making the outflow of the propeller water more equable. Smooth water flow towards the rudder results in reduced noise and vibration levels. The Hydro Spoiler improves the propulsion efficiency and speed performance of a vessel, and enhances the ship’s course-keeping capabilities. Continuous research and experience since the introduction of the Van der Velden® Hydro Spoiler in 1998 have proven that these refinements increase vessel efficiency up to 8%.
At DMC, there are three types of spoilers to choose from:
- HD-B, known as our “standard” spoiler.
- XR-B, this type is designed with a bulb for resistance reduction.
- XR-T, this type is designed with a bulb with streaming body to fill up the entire wakefield from the propeller.
Suited for twin screw vessels.
For other sizes and custom requests, please contact our sales department.