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34-524: Schottel (company) , German manufacturer of ship propulsion Schottel or Schöttel is a German surname. Notable people with the surname include: Schottel (company) In 1921 Josef Becker (1897–1973) founded his craftsman's enterprise in an old farmhouse in Spay on the Rhine . In 1925 he designed and built his first shallop, followed by the first motorboat in 1928. In the mid 1930s Becker bought part of

68-481: A Z-drive system with a propeller that could be endlessly steered through 360 degrees. A classic application for rudderpropellers is tugs as the example of Janus shows. The first tractor tug was commissioned in 1967 in the Port of Hamburg . It was equipped with two Schottel Rudderpropellers in the front third of the vessel. The Schottel Rudderpropeller is used in almost any kind of vessel from offshore vessels to tugs. It

102-459: A network of subsidiary agencies in several countries and regions. Since Schottel developed the first Z-drive in the 1950s the product portfolio has been extended by a range of thruster types (selection). The idea of the rudderpropeller was the result of Becker's thoughts about the propulsion plants that took up too much space on board. He was looking for a system that could be installed space-efficiently with good maneuvering properties and developed

136-472: A rotor diameter between 3 and 5 m (9.8 and 16.4 ft) and produce between 54 and 70 kW (72 and 94 hp). Turbines can be combined to meet higher power demands. In 2016, Schottel Hydro and its subsidiaries planned to install a tidal turbine array named TRITON in the Bay of Fundy , Canada . In 2017, Schottel Hydro scaled down its Bay of Fundy operations, going from the planned large turbine array to

170-549: A smaller tidal platform made by Scottish company Sustainable Marine, which was deployed in 2019. Schottel Hydro and Sustainable Marine merged later in 2019 and continued working in the Bay of Fundy until 2023, when the project was shut down. In 2004 the Elmer A. Sperry Award was given posthumously to Schottel founder Josef Becker for the invention of the propeller. Bay of Fundy The Bay of Fundy ( French : Baie de Fundy )

204-628: A vessel's hull. In 1996 the portfolio expanded with the Schottel Twin Propeller, a twin version of the rudderpropeller. In 2003, the Schottel Combi Drive was established with an electric motor which is vertically integrated into the support tube of the rudderpropeller. In 1998 Schottel opened a new production plant in Suzhou , China . The following year, Schottel acquired WPM Wismarer Propeller-und Maschinenbau GmbH which

238-571: Is a bay between the Canadian provinces of New Brunswick and Nova Scotia , with a small portion touching the U.S. state of Maine . It is an arm of the Gulf of Maine . Its tidal range is the highest in the world. The name is probably a corruption of the French word fendu , meaning 'split'. The tidal range in the Bay of Fundy is about 16 metres (52 ft); the average tidal range worldwide

272-414: Is available as a fixed pitch or controllable-pitch propeller. It is also available as a hydraulically retractable system for open-water service, dynamic positioning or varying water depths and underwater mountable thruster for ships that need to reduce docking times. In 2014 Schottel introduced a rudderpropeller with an additional electric motor (PTI - power take in) as a hybrid propulsion concept. Here,

306-533: Is only one metre (3.3 ft). Some tides are higher than others, depending on the position of the moon, the sun, and atmospheric conditions. Tides are semidiurnal , meaning they have two highs and two lows each day, with about 6 hours and 13 minutes between each high and low tide. Because of tidal resonance in the funnel-shaped bay, the tides that flow through the channel are very powerful. In one half-day tidal cycle, about 100 billion tonnes (110 billion short tons ) of water flow in and out of

340-596: The American Revolution and the War of 1812 . In the 19th century, the bay was the site of much shipping, and shipbuilders flourished, including James Moran of St. Martins, New Brunswick , Joseph Salter , of Moncton , and William D. Lawrence of Maitland, Nova Scotia . Fundy ports produced the fastest ship in the world, Marco Polo ; the largest wooden ship ever built in Canada, William D. Lawrence ; and

374-876: The Minas Basin and the Tantramar Marshes , sending ocean waters surging far inland. The largest population centre on the bay is Saint John, New Brunswick , a major port and the first incorporated city in what is now Canada. Other settlements include, in New Brunswick, St. Andrews , Blacks Harbour , Grand Manan , Campobello , Fundy-St. Martins , Alma , Riverside-Albert , Hopewell Cape , and Sackville , and in Nova Scotia, Amherst , Advocate Harbour , Parrsboro , Truro , Maitland , Cheverie , Windsor , Wolfville , Canning , Annapolis Royal , and Digby . The port of Saint John gives access to

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408-493: The columnar jointing which can be seen on Brier and Grand Manan islands, among other places around the bay. These flows often are the sites of rarer mineral deposits including agate , amethyst , and stilbite , the latter being the provincial mineral of Nova Scotia. These rifts filled with sediment which became sedimentary rock . Many fossils have been found along the Fundy shoreline. The oldest dinosaur fossil in Canada

442-658: The harbour porpoise . The Bay of Fundy mudflats are a rare and unique intertidal habitat. Major mudflats are found on around the Maringouin Peninsula which lies between Shepody Bay and the Cumberland Basin and at the northern end of Chignecto Bay . On the Nova Scotia side, mudflats are found on the southern side of the Minas Basin and in Cobequid Bay . In the Minas Basin, the size of

476-402: The Bay of Fundy and lived in communities around the bay for centuries before the first Europeans arrived. According to Miꞌkmaq legend, the tide was created when Glooscap wanted to take a bath. The first European to visit the bay may have been Portuguese explorer João Álvares Fagundes in about 1520, although the bay does not appear on Portuguese maps until 1558. The first European settlement

510-564: The Bay of Fundy have a tidal bore , a wave front of the incoming tide that "bores" its way up a river against its normal flow. Notable tidal bores include those on the Petitcodiac , Maccan , St. Croix , and Kennetcook rivers. Before the construction of a causeway in 1968 and subsequent siltation of the river, the Petitcodiac River had one of the world's largest tidal bores, up to two metres (6.6 ft) high. Since

544-536: The bay, which is twice as much as the combined total flow of all the rivers of the world over the same period. The Annapolis Royal Generating Station , a 20  MW tidal power station on the Annapolis River upstream of Annapolis Royal , was, until its shutdown in 2019, one of the few tidal generating stations in the world, and the only one in North America. Most of the rivers that drain into

578-574: The bow or stern of a vessel in order to improve maneuverability. Depending on the type of vessel, the range of application for Transverse Thrusters extends from harbor maneuvering to positioning tasks offshore. The units can be installed either with a horizontal or vertical motor flange. Schottel Hydro bundles up the hydrokinetic energy business of Schottel. The subsidiary comprises activities in three segments: instream turbines for river and tidal currents, semi-submerged platforms and components, such as turbine hubs and drives. The hydrokinetic turbines have

612-566: The early Jurassic , when all land on earth was part of a supercontinent called Pangaea . At that time what is now the Maritimes was situated near the equator and had a warm tropical climate and lush vegetation. As continental drift reshaped the world, rift valleys formed, including the Cobequid – Chedabucto fault system. During the continental breakup, magma erupted as basaltic lavas and left igneous rock formations such as

646-554: The ecosystem of the bay. A result of shipping traffic has been the potential for increased collisions between ships and the critically endangered North Atlantic right whale . In 2003, the Canadian Coast Guard adjusted shipping lanes crossing prime whale feeding areas at the entrance to the Bay of Fundy to lessen the risk of collision. Many other marine mammals are found in the bay including fin whales , humpback whales , minke whales , Atlantic white-sided dolphin and

680-480: The electric motor suffices for partial-load duties, the diesel engine is employed for operation at greater load, and the electric motor can be switched on to provide additional power. The PTI and diesel engine are centrally-controlled as a single system. This thruster is installed in the tug Eddy , built by Holland Shipyard. The demand for increasing power ratings could first be answered with larger rudderpropellers. Limits were set to this trend by mechanical stress and

714-507: The fact that with an increasing propeller diameter, the draft of the vessel inevitably increases. Schottel therefore developed a thruster where the required power is divided between two counter-rotating thrusters that share a single shaft. The Twin Propeller is equipped with a pull propeller and a push propeller. The vortex street of the front pull propeller passes between the blades of the rear push propeller without impeding it. Contraction of

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748-593: The first female sea captain in the western world, Molly Kool . The mystery ship Mary Celeste was also built there. The highest water level ever recorded, 21.6 metres (71 feet), occurred in October 1869. It caused extensive destruction to ports and communities, much of which was attributed to a two-metre storm surge created by the Saxby Gale , a tropical cyclone , which coincided with a perigean spring tide . Waves breached dykes protecting low-lying farmland in

782-523: The first permanent British settlement in Jamestown, Virginia . About 75 years later, Acadians spread out along the bay, founding Grand-Pré , Beaubassin , Cobequid , and Pisiguit . There was much military action and many attacks on the settlements around the bay, first as the French and British fought for control of the area, leading to the expulsion of the Acadians , and later by Americans during

816-541: The hull. Schottel Controllable Pitch Propellers can be used in several vessel types like bigger ferries, container ships, heavy lift vessels or offshore supply vessels. The power spectrum includes application up to 30 MW (40,000 hp). The propeller diameters vary between 1.5 and 8.0 m (4 ft 11 in and 26 ft 3 in). Unlike a conventional fixed pitch propeller, the blades can be rotated and change their pitches variably from zero thrust to headway or reversing. Transverse Thrusters are installed in

850-400: The mudflats from low to high water marks is as much as 4 km (2.5 mi). Due to tidal turbulence, the water in these area contains very high amounts of fine sediment, source from tidal erosion of Carboniferous and Triassic sedimentary rock. Primary producers include hollow green weed , phytoplankton , algae , and sea lettuce . Protected areas include: The Miꞌkmaq fished in

884-626: The opening of the causeway gates in 2010, the bore has been coming back, and in 2013 surfers rode it a record-breaking 29 kilometres (18 mi). Other tidal phenomena include the Reversing Falls near the mouth of the St. John River , a rip tide at Cape Enrage , and the Old Sow whirlpool at Passamaquoddy Bay . The story of the Fundy Basin begins about 200 million years ago in

918-475: The power currently required and distribute it to the various consumers. Schottel developed the Pump Jet for shallow waters. It is also used as an additional maneuvering aid for main propulsion or as a redundant auxiliary propulsion unit. An impeller sucks in water from under the hull and forces it into a pump housing. The outlet nozzles are integrated into an azimuthing base plate which is installed flush with

952-502: The present-day company premises and founded Schottel Werft. He named his enterprise after a section of the river Rhine which is called Auf der Schottel and located close by in Osterspai . With the beginning of the 1950s Becker started working on his invention, a ship propeller that is steerable through 360 degrees. In 1951 the company's own motorboat was equipped with the first Schottel Rudderpropeller, which Becker called SRP. Soon,

986-400: The principle of an electric drive. The Combi Drive exists in both single and twin propeller versions. Instead of an above-water gearbox, the electric motor is integrated into the vertical shaft of the thruster. In combination with a power management system, electric drives increase the efficiency of the propulsion system and reduce fuel consumption. Electric energy generation systems produce only

1020-632: The rudderpropeller was known as a propulsion unit for small fast patrol craft for the German police and government. At the end of this decade Schottel opened its first subsidiary abroad in the Netherlands . In 1967, Janus , the first tractor tug equipped with two rudderpropellers, was launched in Hamburg . The next Schottel propulsion system was launched in 1978: The Schottel Pump Jet was designed for operation in shallow waters and installed flush with

1054-508: The slip stream in the pull propeller means that more water reaches the push propeller from the sides. The strut is equipped with a fin, thus the swirl energy generated in the propeller stream is recovered. Additionally, the flow around the fins creates a lift component in the thrust direction, which has a thrust-enhancing effect. The Combi Drive is based on the Schottel Rudderpropeller and combines its characteristics with

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1088-600: Was French, founded at Saint Croix Island in Maine, and then Port Royal , founded by Pierre Dugua and Samuel de Champlain in 1605. Champlain named it Labaye Francoise (The French Bay). Champlain describes finding an old rotted cross in the bay which may have been left by the Portuguese. The village was the first permanent European settlement north of the Spanish St. Augustine, Florida , and predated by two years

1122-601: Was found at Burntcoat Head . Very early reptiles have been discovered in Carboniferous tree trunks at Joggins . Wasson Bluff has a rich trove of Jurassic fossils. The bay is a member of the Global Geoparks Network , a UNESCO initiative to promote and conserve the planet's geological heritage. Although some land areas are protected, there is no formal marine protection zone in the bay. The Conservation Council of New Brunswick works to protect

1156-596: Was merged in the newly founded Schottel Schiffsmaschinen and a new Schottel GmbH office in Wismar . Schottel expands its production capacities in Dörth , an industrial park surrounding the Schottel headquarters in Spay . In summer 2015, 23,000 m (250,000 sq ft) of production and office space will be available. Schottel GmbH has its headquarters in Spay , two German subsidiaries in Hamburg and Wismar , and

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