Type U 9 submarine

Type U '9' was a class of U-boats built during World War I by the Kaiserliche Marine.

Design

Type U 9s had an overall length of The boats' beam was, the draught was. The boats displaced when surfaced and when submerged.
Type U 9s were fitted with two Körting 6-cylinder and two 8-cylinder two-stroke paraffin engines with a total of for use on the surface and two SSW double-acting electric motors with a total of for underwater use. These engines powered two shafts, which gave the boats a top surface speed of, and when submerged. Cruising range was at on the surface and at submerged. Constructional diving depth was.
The U-boats were armed with four torpedo tubes, two fitted in the bow and two in the stern, and carried six torpedoes. The boats' complement was 4 officers and 25 enlisted.