Wave profile ship
A wave profile ship also wave profile steamer (English Corrugated Ship , Corrugated Vessel , Corrugated Steam Ship or Corrugated Tramp ) was a type of ship for bulk transport that emerged in Great Britain at the beginning of the 20th century .
description
The name of the type of ship is derived from the design of the hull with several lateral undulating bulges of the outer skin that extend from the shoulder areas of the fore and aft . The bulges were intended to increase the strength of the longitudinal structure of the ship's hull, which saves reinforcing fixtures in the holds. The ships, which were mainly powered by steam engines, were mostly used as tramp ships and necklaces .
The design of the new type of ship, introduced in 1905, came from the shipbuilding engineer Arthur Haver, who had previously developed the tower deck while he was working for the William Doxford & Sons shipyard until 1903 . Haver originally experimented with a ship shape that enabled a better propeller influx through lateral recesses, but the construction of which proved to be too complex in terms of production. Further tests showed that two wave-shaped bulges of the outer skin in the longitudinal direction of the alternating aisle led to a comparable effect. Together with William Petersen, who had already ordered the first tower decker, Haver founded the Monitor Steamship Company , based on its monitor patent design , also called monitor design ( sometimes also called Ericsson design after the shipping company that ordered the first ), the construction of the first wave profile ship, the Monitoria , commissioned from Osbourne, Graham & Company shipyard in Sunderland . The ship was launched in July 1909 and delivered to the Ericsson Shipping Company from Newcastle upon Tyne in mid-August of the same year . Unlike usual, the new ship completed its shipyard test drives with a full load of coal on the 13th of the month and began its maiden voyage to Stugsund immediately after it was successfully completed . The test run results were interesting in that they the 23 before, but in spite of the loaded ship with the usual occupation and normal bunker coal to the space ship values on the same lines with no extensions built sister ships approach ranged.
The Monitoria was followed two years later by the sister ship Hyltonia and then initially a few other ships in British shipyards. The seventh ship was built under license at a Norwegian shipyard. A total of 30 wave profile ships were built, with only a few shipping companies apart from Petersen commissioning a second ship of this type. Shipping companies' interest in this type continued until the mid-1920s. Since the wave shape of the ship's sides made the installation of stringers superfluous and allowed a larger frame spacing than usual, the wave profile ships were characterized by a more favorable ratio of the carrying capacity and the cargo space to the net measurement compared to conventionally built ships . In addition, the ships built according to the Monitor patent should have greater longitudinal strength, better sea state properties and lower fuel consumption. The higher probability of mechanical damage in the area of the exposed bulges was cited as a disadvantage. Another point with longer ships was an alleged tendency to crack the outer skin, which is said to have been a factor in the sinking of the wave profile ship King James . The ship was already 35 years old when it was lost. In addition, due to the more complex hull structure, the construction of a wave profile ship cost a little more than the construction of a comparable conventional ship and the shipyard also had to pay a license fee of 25 pence per ton of carrying capacity of the ship to the Monitor Steamship Company. In 1925, two sister ships were built at the Short Brothers shipyard, which were identical except for the monitor system - the wave profile ship Newbrough and its conventionally built Simonsburn . The difference in load capacity was around 3.3 percent with 9,160 tons to 8,870 tons, the difference in cargo space volume with 13,223 to 12,980 cubic meters was just under two percent. When building the two ships, a comparison calculation by the Common Brothers for the wave profile ship came to a 1,143 pound (around 5%) higher steel price, 1915 pounds (13%) additional wages to which a further 2290 pounds in license fees would have to be added. Ultimately, the yard gave the Newbrough for the cost price of £ 79,500, while the Simonsburn , whose cost price was only £ 73,656, was delivered for £ 79,000.
Individual evidence
- ↑ Technical advances in shipbuilding . In: Hans Eden (Hrsg.): Illustrated yearbook of inventions and technical advances . Karl Prochaska, Techen / Leipzig / Vienna 1910, p. 96-98 .
- ↑ Ships with Corrugated Hulls - Successful Experiments . In: The Mercury , Hobart, November 23, 1912, p. 11 (English)
- ^ Corrugated System of Ship Construction . In: The Engineer . 1909, p. 145 .
- ^ The Monitoria. Trial Trip Results . In: The Mercury , Hobart, September 27, 1909, p. 4 (English)
- ^ PN Thomas: British Ocean Tramps . Volume 1. Builders & Cargoes . Wayne Research Publications, Wolverhampton 1992, ISBN 0-905184-13-0 .
- ↑ Novel Ships. A New Form of Corrugated Construction . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. In: The Straits Times , November 11, 1912, p. 12 (English)
- ^ Alan S. Mallett: Idyll of the Kings - The history of the King Line 1889-1979 . World Ship Society, Kendal 1980, ISBN 0-905617-10-X .
- ^ John Lingwood, Kevin O'Donoghue: The trades Increase . World Ship Society, Kendal 1993, ISBN 0-905617-74-6 , pp. 43-45 .
