page_title: Growian
section_title: Development and outcomes
hierarchical_section_title: Growian / Development and outcomes
caption_attribution_description: Deutsch: Auto- und Technikmuseum Sinsheim (Rhein-Neckar-Kreis, Baden-Württemberg, Deutschland); Growian-Rotorblatt
context_page_description: Growian or GROWIAN was a publicly funded wind turbine built in the Kaiser-Wilhelm-Koog near Marne for purposes of technology testing in the 1980s. It was a two-bladed "lee runner" with a hub height of about 100 metres.
  For a long time Growian was the world's largest wind turbine. Many features of the installation were novel and had not previously been trialled at this scale. Due to manufacturing faults in the casing, the turbine could not be run at full performance, and various issues with materials and construction prevented continuous testing. Consequently, the installation was idle for the greater part of the period between the first test run on 6 July 1983 and end of operations in August 1987. Growian was decommissioned over the course of 1987, and dismantled in summer 1988.
context_section_description: Towards the end of 1976, the German Federal Ministry of Education and Research (BMFT) decided to use research contracts and expert consultation to investigate the development of large wind turbines. This decision, taken as a result of public pressure, ran contrary to the stalling efforts of the major energy providers. Contracts were awarded to MAN SE , the Institute for Aerodynamics and Gas Dynamics at the University of Stuttgart, and the University of Regensburg. In 1978 the BMFT decided to construct the world's largest wind turbine with a tower height and blade diameter of 100 m. MAN SE was chosen as main contractor, and the formation of a construction and operation company was given into the charge of the reluctant Hamburgische Electricitäts-Werke (HEW). This led to the formation of the Growian GmbH on 8 January 1980, of which HEW held 46.7%, Schleswag held 30.1%, and RWE held 23.2%. 
  Overall and technical direction were the responsibility of HEW, while Schleswag dealt with commercial management. The basic contract between the partners of 3 January 1978 stipulated that after the project's conclusion, the installation was "anticipated to be dismantled and scrapped".
  The partners as well as the BMFT also had political motives connected with the project. Günther Klätte, management board member of RWE, stated during a general business meeting: "We require Growian [in the general sense of large wind turbines] as a proof of failure of concept", and he noted that "the Growian is a kind of pedagogical tool to convert the anti-nuclear energy crowd to the true faith". A similar statement regarding the incurred financial burdens was reported of Minister of Finance and former Minister of Research Hans Matthöfer: "We know it won't do anything for us. But we do it to demonstrate to the wind energy advocates that it doesn't work." After the Green Party had derided the installation as the electricity provider's "fig leaf" on the occasion of groundbreaking in May 1981, the RWE took internal measures to make sure that publicly a position of open-mindedness towards alternative energy production was emphasized while public interest in wind energy was allayed.   
  Insuperable structural load and material problems occurred, not least due to the two-bladed lee runner configuration. The installation turned out to be a failure in most respects, spent substantially more time under repair than up and running, and was not even capable of sustained test operation. When it was decommissioned it had only logged a total of 420 hours in active operation.
  Growian is regarded as one of the largest failures in the history of wind power and was unable to fulfill any of the expectations riding on its conception. What few insights were gained found little application in wind turbine construction. Some lessons were however learned from conceptional mistakes made in its construction, e.g., the futility of trying to reach profitable installation sizes without taking intermediate steps.
  The point of view that multi-MW-yield wind turbines were technically and commercially infeasible gained some currency after the failure of the project, but was eventually superseded by technical progress. Beginning with the late 2000s, twenty-five years after Growian was decommissioned, installations with identical dimensions and yield (100 m rotor diameter, 3 MW net yield) were being produced in large numbers, a class of turbines that has continued to dominate the market and to push forward the mean net yield of newly installed turbines. As of 2015, substantially larger installations with yields up to 8 MW and rotor diameters of up to 170 m are present in the offshore sector. In contrast to Growian, however, these turbine types were incrementally developed from smaller installations in the 0.1 MW range. 
  Growian's former locations is still being used for wind power generation. In 1988, Germany's first wind farm, the Windenergiepark Westküste, was built on a 20 hectare section of the former test area. It initially comprised 30 smaller turbines with net yields of 10-25 kW, provid
caption: Growian rotor blade with museum logo at Auto & Technik Museum Sinsheim
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