Toralf Westermoen (July 5, 1914 – May 6, 1986) was a pioneer for the development of high speed craft in Norway. Westermoen was involved in the companies Båtservice Verft, Westermoen Båtbyggeri og Mek. Verksted , Westermoen Hydrofoil and Westamarin , all situated in Mandal.
Norway, officially the Kingdom of Norway, is a Nordic country in Northwestern Europe whose territory comprises the western and northernmost portion of the Scandinavian Peninsula; the remote island of Jan Mayen and the archipelago of Svalbard are also part of the Kingdom of Norway. The Antarctic Peter I Island and the sub-Antarctic Bouvet Island are dependent territories and thus not considered part of the kingdom. Norway also lays claim to a section of Antarctica known as Queen Maud Land.
Westermoen Hydrofoil was a shipyard located in Mandal, Norway, which has specialized in high speed craft, and pioneered many designs.
On his own initiative, Westermoen started development of ahigh speed motor-torpedo vessel early in the 1950s. The prototype, Nasty was the start of the Tjeld class patrol boat that was put into production in 1957. The top speed was around 45 knots. Jan Herman Linge was the main designer for Westermoens from 1949 to 1956.
Jan Herman Linge was a Norwegian engineer and boat designer. He was the son of Martin Linge, known for his war effort in Kompani Linge.
The Nasty/Tjeld-class was in continuous production until 1970, and in addition to sales to the Norwegian navy, it was exported to Germany, Greece, Turkey and the United States.
Germany, officially the Federal Republic of Germany, is a country in Central and Western Europe, lying between the Baltic and North Seas to the north, and the Alps to the south. It borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, France to the southwest, and Luxembourg, Belgium and the Netherlands to the west.
Greece, officially the Hellenic Republic, historically also known as Hellas, is a country located in Southern and Southeast Europe, with a population of approximately 11 million as of 2016. Athens is the nation's capital and largest city, followed by Thessaloniki.
Turkey, officially the Republic of Turkey, is a transcontinental country located mainly in Western Asia, with a smaller portion on the Balkan Peninsula in Southeast Europe. East Thrace, located in Europe, is separated from Anatolia by the Sea of Marmara, the Bosphorous strait and the Dardanelles. Turkey is bordered by Greece and Bulgaria to its northwest; Georgia to its northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. Ankara is its capital but Istanbul is the country's largest city. Approximately 70 to 80 per cent of the country's citizens identify as Turkish. Kurds are the largest minority; the size of the Kurdish population is a subject of dispute with estimates placing the figure at anywhere from 12 to 25 per cent of the population.
In the period 1965 to 1970, Westermoen Hydrofoil built 6 Storm class patrol boats. The Storm class we used as the basis for the Westamaran catamaran, which was essentially a Storm-class hull divided in the middle and separated to form a much wider catamaran, suited for passenger transport.
The Westamaran is a pioneer type of passenger transport high speed catamarans developed by Westermoen Hydrofoil in 1973. The craft was highly successful, and introduced a new era of passenger transport along the Norwegian coast and elsewhere.
A catamaran is a multi-hulled watercraft featuring two parallel hulls of equal size. It is a geometry-stabilized craft, deriving its stability from its wide beam, rather than from a ballasted keel as with a monohull sailboat. Catamaran is from a Tamil word, kattumaram, which means "logs tied together".
The first generation Westamaran catamarans were not as quick as the competing hydrofoils, but their capacity was larger, maintenance easier, and they were more comfortable. The second generation catamarans, with symmetrical hulls, matched the hydrofoils in speed, reaching 35-40 knots.
A hydrofoil is a lifting surface, or foil, that operates in water. They are similar in appearance and purpose to aerofoils used by aeroplanes. Boats that use hydrofoil technology are also simply termed hydrofoils. As a hydrofoil craft gains speed, the hydrofoils lift the boat's hull out of the water, decreasing drag and allowing greater speeds.
Toralf Westermoen was CEO in the various companies until 1969 when he was elected to the Norwegian parliament for Kristelig Folkeparti, where he served until 1981.
The technology and heritage that Westermoen initiated, lives on in the company Umoe Mandal, who are building third generation catamaran craft that also includes SES-technology, such as the Skjold class patrol boats.
His son Thore Westermoen also became involved in politics.
Skjold-class corvettes are a class of six large, superfast, stealth missile corvettes in service with the Royal Norwegian Navy. The boats were formerly classed as MTBs but, from 2009, the Royal Norwegian Navy has described them as corvettes (korvett) because their seaworthiness is seen as comparable to corvettes, and because they do not carry torpedoes. They were built at the Umoe Mandal yard. With a maximum speed of 60 knots (110 km/h), the Skjold-class corvettes were the fastest combat ships afloat at the time of their introduction.
A Surface Effect Ship (SES) or Sidewall Hovercraft is a watercraft that has both an air cushion, like a hovercraft, and twin hulls, like a catamaran. When the air cushion is in use, a small portion of the twin hulls remain in the water. When the air cushion is turned off, the full weight of the vessel is supported by the buoyancy of the twin hulls.
The Nasty type patrol boats were a series of fast patrol boats designed and built in Norway during the 1950s and '60s for the Norwegian, and other, navies.
A/S Westermoen Båtbyggeri og Mek Verksted was a shipyard located in Mandal, Norway, who specialized in high speed craft. Under the leadership of Toralf Westermoen in the 1950s, the yard has produced a long range of high speed boat types, such as:
A high-speed craft (HSC) is a high-speed water vessel for civilian use, also called a fastcraft or fast ferry. The first high-speed craft were often hydrofoils or hovercraft, but in the 1990s catamaran and monohull designs become more popular and large hydrofoils and hovercraft are no longer built. Most high-speed craft serve as passenger ferries, but the largest catamarans and monohulls also carry cars, buses, large trucks and freight.
A sailing hydrofoil, hydrofoil sailboat, or hydrosail is a sailboat with wing-like foils mounted under the hull. As the craft increases its speed the hydrofoils lift the hull up and out of the water, greatly reducing wetted area, resulting in decreased drag and increased speed. A sailing hydrofoil can achieve speeds exceeding twice the wind speed.
The Type 22 missile boat is a ship class in the Chinese People's Liberation Army Navy. The first boat was launched in April 2004 by the Hudong-Zhonghua Shipyard at Shanghai. The boats incorporate stealth features and are based on Australian-designed wave-piercing catamaran hulls that are more stable than other fast missile craft in high sea conditions. Approximately 83 of these missile boats are currently in service with three flotillas having been produced over a span of seven years.
Intermarine is an Italian shipbuilding company, owned by the Rodriquez Cantieri Navali Group.
MV Mariam is a Bolivian-flagged passenger ferry with a 228 gross tonnage (GT). Built in 1982 at Westermoen Hydrofoil shipyard, the ship is a catamaran 29.00 metres in length with a capacity of about 200 passengers. Built as Venture 84, the ship was in service with the French ferry operator Emeraude Lines from 1983 to 1996, serving a route between the Channel Islands and France. From 1996 to 2008, the ship was operated by Cypriot ferry operator Fergün Denizcilik as Fergün Express III.
HNoMS Nasty was a fast attack craft of the Royal Norwegian Navy, built as a private venture by Westermoen Båtbyggeri of Mandal, Norway. Designed by Jan Herman Linge she was an experimental craft, of wooden hull construction, launched in 1958. Nasty served with the Royal Norwegian Navy and was the prototype for the navies Tjeld class patrol boats. Boats to Nasty's design were also built for the US and German navies. Nasty was stricken in 1967.
The Nasty class of fast patrol boats were a set of 20 vessels built for the United States Navy to a Norwegian design and purchased in the 1960s for covert operations during the Vietnam War. Following the conflict they remained in service until the early 1980s.
For other ship classes of the same name see Nasty-type patrol boat
The Greek Tjeld type patrol boats were a set of six fast patrol boats built to a Norwegian design and operated by the Hellenic Navy during the 1960s and early 1970s.
The Tjeld class was a class of twenty fast patrol boats designed and built for the Royal Norwegian Navy in the late 1950s. They were used as torpedo boats in Norway where this type of vessel were called MTBs or motor torpedo boats (motortorpedobåt). They remained in service until the late 1970s, when they were placed in reserve; all were stricken by 1995.