Friday, July 13, 2018

Upsidedown Craft

Ulstein X-Bow Ships: Revolutionary Ship Design

Ship Facts Jan 19, 2018 2 min. 7 sec.

from Wikipedia
Inverted Bow

In ship design, an inverted bow (occasionally also referred to as reverse bow) is a ship's or large boat's bow whose farthest forward point is not at the top. The result may somewhat resemble a submarine's bow. Inverted bows maximize the length of waterline and hence the hull speed, and have often better hydrodynamic drag than ordinary bows. On the other hand, they have very little reserve buoyancy and tend to dive under waves instead of piercing or going over them.

Inverted bows were popular on battleships and large cruisers in the early 20th century. They fell out of favour, as they were very wet on high speeds and heavy seas, but have made a comeback on modern ship design.

USS Zumwalt (DDG-1000), lead ship of her class, after floating out of drydock in 2013

"131028-O-ZZ999-103 BATH, Maine (Oct. 28, 2013) The Zumwalt-class guided-missile destroyer DDG 1000 is floated out of dry dock at the General Dynamics Bath Iron Works shipyard. The ship, the first of three Zumwalt-class destroyers, will provide independent forward presence and deterrence, support special operations forces and operate as part of joint and combined expeditionary forces. The lead ship and class are named in honor of former Chief of Naval Operations Adm. Elmo R. "Bud" Zumwalt Jr., who served as chief of naval operations from 1970-1974. (U.S. Navy photo courtesy of General Dynamics/Released)"

Bourbon Orca anchor tug, shown in 2012, was the first ship built with an Ulstein X-bow in 2006 - Manxruler 
M/Y A cruising at Sorrento, Italy in 2012 - Matthias Kabel 
Norwegian offshore support vessel Siem Moxie - Max Rykcaert 
Well intervention vessel Sarah with X-bow - BoH 
SMS Viribus Unitis, a dreadnought type ship with inverted bow, flagship of Austro-Hungarian navy in 1912

No comments: