Trudelturm

The Trudelturm (English: "spin tower") is an approximately 20-meter-high former specialist wind tunnel in the Adlershof district of Berlin, Germany.

The building, also known as the "Trudelwindkanal" ("spin wind tunnel"), was built by the German Aviation Research Institute (Deutsche Versuchsanstalt für Luftfahrt, DVL) between 1934 and 1936 at the former Berlin-Johannisthal airfield.

[1] When it was built, the tower represented a technical innovation that for the first time made it possible to simulate the dangerous condition of aircraft spin in the laboratory.

A (precisely manufactured) model could be inserted into a vertical (bottom-up) airflow in such a way that it always flew at the height of the observation facility and could be filmed by high-speed cameras.

The tower currently belongs to the Aerodynamic Park on the Adlershof campus of Humboldt University and is part of the building ensemble of Technical Monuments of Aviation Research in Berlin-Adlershof of the 1930s.