|This article relies largely or entirely upon a single source. (May 2014)|
The Schwertwal was a German miniature submarine design that reached the trial stage in late April 1945. It had a crew of two and was designed to have a high subsurface speed of around 20 knots. The high speed was archived by the use of a Walther turbine. The submarine carried an armament of two torpedoes. The submarine lacked a periscope and the pilot viewed the outside world through an acrylic glass dome.
Design work for an even faster version began but the plans never left the drawing board.
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