Ulstein X-Bow
The Ulstein X-Bow (pronounced "Crossbow") is a patented bow shape from the Norwegian shipbuilding company Ulstein Group .
details
The Ulstein X-Bow is a bow shape without a bulbous bow, the stem of which tilts backwards above the waterline. The advantages of the shape are the lower flow resistance and higher speeds in difficult sea conditions. Due to the more complete stern in the area just above the water surface , ships with X-Bow achieve higher lift with less immersion, which leads to softer swell movements of the ship's hull and lower negative accelerations.
history
The Ulstein Group subsidiary Ulstein Design AS designed the Ulstein X-Bow between 2001 and 2004. The main objective of the development was to improve the sea behavior of offshore vehicles in difficult sea conditions. The shipping company Bourbon Offshore Norway and the hydraulic company Odim were also involved in the design and implementation of the X-Bow . After model tests carried out at Marintek in Trondheim in February 2005 , construction began in 2005 on the first vehicle equipped with the new type of bow, the AHTS Bourbon Orca . In December 2005, the hull , which was created in Poland , arrived in Norway, on April 7, 2006 the Bourbon Orca was undocked and finally christened on June 24, 2006.
See also
Web links
- Crossbow site of the Ulstein Group (English)
- Patent US7658159B2 : "Foreship arrangement for a vessel of the displacement type" (priority 2005-03-09 NO20051221A)