The Wind Turbine Crew, and the external experts.
The so called TVIND-Schools were initiated in 1972 by a group of teachers lead by charismatic teacher Amdi Petersen. Soon a cluster of small schools were established in the area west of Holstebro in west Jutland, Denmark. The schools all focused on a combination of thearetical and practical work or "learning by doing".
After the 1973 oil crisis the Tvind Schools wanted to establish an independent energy production for themselves, and to set an example to avoid the implementation of nuclear power stations in Denmark. They chose to build a Megawatt Wind Turbine, and advertized in nationwide newspapers for crew members ("Møllebyggere") to the Turbine Crew. Most of the crew were volunteers, and a few later became part of the Tvind organisation. Some of the members are now - 30 years later - valuable employees in the Danish wind Turbine Industry. This happened shortly after 1968, where many young people did not think much of their privat progress in making money, but often wanted to volunteer "for a better world". Non profit Environmental movements as Friends of The Earth and Greenpeace were established in those years.
The TVIND Turbine was first and foremost built by young volunteers from Denmark and abroad, but the result would never have been so fine, if they had not asked for help by external experts in the design and construction process:
At first they visited the world famous German professor Ulrich Hütter at his institute in Stuttgart. This is probably the reason who the turbine was designed as a down wind turbine, despite of the successfull Danish Gedser turbine design. But first and foremost the blade design was influenced by Hütter, including the vulnerable Hütter blade root system. In the aerodynamical and structural blade design, the young engineers of Tvind had good help of RISØ's Grand old man in aerodynamics Mr. Helge Petersen, and also Peter Steen Andersen and Per Lundsager.
For the tower design Ingeneer Hans Lundgaard Laursen, Beder helped the team. The nacelle design was assisted by Lars Svanborg, who ran the engineering design and construction company "Idé Smeden" at Ravnstrup near Viborg.
For the design of the electric control and frequency inverter system, professor Ulrik Krabbe of the Technical University of Copenhagen helped, and also engaged a crew of students to design and build part of the electric systems.
Another crucuial factor was the disciplin amongst the turbine builders. The volunteers were typically young anti authoritarian people. But they wanted to make a difference in creating a greener world, so they accepted a very stringent disciplin at the wind turbine crew. Many hard working hours and sometimes very little sleeping and rest. They all struggled hard towards the common goal and they did not make any money for themselves in the building period.