Type VIID
The type VIID boats, designed in 1939 and 1940, were a lengthened - by 10 m (32 ft 10 in) - version of the VIIC for use as a minelayer. The mines were carried in, and released from, three banks of five vertical tubes just aft of the conning tower. The extended hull also improved fuel and food storage.
On the surface the boat used two supercharged Germaniawerft, 6 cylinder, 4-stroke F46 diesels delivering 3,200 bhp (2,400 kW) at between 470 to 490 rpm. When submerged the boat used two AEG GU 460/8-276 electric motors giving a total of 750 shp (560 kW) at 285 rpm.
Only one (U-218) managed to survive the war; the other five were sunk, killing all crew members.
Read more about this topic: German Type VII Submarine
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“The real American type can never be a ballet dancer. The legs are too long, the body too supple and the spirit too free for this school of affected grace and toe walking.”
—Isadora Duncan (18781927)