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The STIER is a tugboat that towed and manoeuvred ships in Bremen harbours. The harbor tug with Voith-Schneider propellers can be seen and entered in the Museum Harbor.
Among the exhibits shown in the open-air museum of the German Maritime Museum is a "water tractor" called STIER, which was built according to a completely new concept. The aim was to create a particularly powerful, manoeuvrable and at the same time very safe boat that could tow and manoeuvre large ships that were difficult to navigate in the harbour area.
The STIER was launched in 1954 at the Jadewerft Wilhelmshaven, served for 24 years in Bremen harbours for Norddeutscher Lloyd (NDL) and became the model for hundreds of similar harbour tugs worldwide. In 1978 NDL handed over this ship to DSM.
Voith-Schneider propellers as a technical innovation made the tug particularly maneuverable.
The technical innovation consists of two Voith-Schneider-Propellers, each with four vertical blades rotating around a common axis. The angle of attack of the blades can be varied in the range of 360 degrees. Thus, the thrust can be directed in any direction. The propellers are each driven by one diesel engine. This type of tug is still in use today, especially in port areas or in connection with the erection of offshore wind turbines.
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Norddeutscher Lloyd Bremen
two diesel engines of 350 HP
via two Voith-Schneider propellers
Dieses Schiff kann im Rahmen der Öffnungszeiten des Museumshafens besichtigt werden.