Test fighter Messerschmitt BF.109E of the Nazi Luftwaffe in the Great Wind Tunnel in Berlin, the Third Reich.
The large Aerodynamic Pipe of the Aerodynamic Park in the Berlin area Adlershof was built in 1932-1934. With its help, aerodynamic studies of air currents were carried out. In a tubular device with a diameter of 8.5-12 m, the airflow in the measuring laboratory was directed to the aircraft parts, and thus the characteristics of the drag were measured.
The object has been preserved to the present time, it is a protected historical monument.