Submarine class XXVII F

XXVII F class

Simplified representation of XXVII F 2

Ship data flag  German Empire Ship type Small submarine Whereabouts Not translated

Ship dimensions and crew length 11.28 m ( Lüa ) width 1.05 (greatest width) m displacement 9.25 t (with torpedo) and 7.9 t (without torpedo)   crew 1

Machine system machine Walter drive Machine performance 300 hp (221 kW) Top speed 20.4 kn (38 km / h) propeller 2 (counter-rotating) ⌀ 470 mm counterclockwise and ⌀ 540 mm clockwise

Mission data submarine Top speed submerged 22.6 kn (42 km / h)

The submarine class XXVII F was a project study of a miniature submarine of the German Navy during the Second World War . The development of the submarine class XXVII F by the development department of the small combat units of the Kriegsmarine began in the summer of 1944 after the Allied invasion of Normandy .

construction

The basic structure of the new class of ship was roughly similar to that of the Negro , but in contrast to this it should be submersible and much faster. This was to be achieved by means of a Walter turbine , also in the hope that the enormous research work on the Walter drive could use conventional seawater as feed water for the Walter systems.

The class was planned without diving cells and should only be able to dive dynamically. Any weight changes that may occur, for example due to the reduction in Aurol-Walter fuel during use, should also be dynamically compensated for. The primary armament consisted of a planned torpedo of the type G7 , which was arranged in a trough-shaped recess below the fuselage and was to be shot down at the bow.

However, the project to develop seawater injection for the Walter drives was stopped. This meant that the development of the submarine class XXVII F was initially abandoned, but was resumed after a delay with the now planned class XXVII F 2. The now planned Walter turbine with fresh water injection increased the circumference of the boat to 8 m ³ , whereby the boat had to be provided with compensation tanks due to the fresh water tanks that were now carried along. Dynamic diving was no longer possible.

The HSVA carried out the first model towing tests in August 1944 , which came to a good result. In their opinion, minor modifications should be enough to eliminate the boat's final weaknesses. However, for an unknown reason, the promising concept was stopped and finally abandoned.

Individual evidence

1. ↑ Harald Fock: Naval small weapons. Manned torpedoes, small submarines, small speedboats, explosives yesterday - today - tomorrow. Nikol, Hamburg 1996, ISBN 3-930656-34-5 , p. 74.