This is an apolitical forum for discussions on the Axis nations, as well as the First and Second World Wars in general hosted by Marcus Wendel's Axis History Factbook in cooperation with Michael Miller's Axis Biographical Research and Christoph Awender's WW2 day by day.
Some controversy surrounds her torpedo armament. She carried four bow tubes armed with 21.7" torpedoes for use while submerged, that much is agreed upon. Most secondary and Internet sources have her armed with six tubes, mounted on a platform at the stern for use when surfaced. Four of these were the fast but short-ranged 15.7" torpedoes. Other sources (Submarines by Anthony Preston, for example) and most importantly the two-volume history of the French Navy by Henri Le Messon, state that two quad mounted platforms were carried astern, one for both 15.7" and 21.7" torpedoes. Henri Le Messon was a member of the French Marine Academy and editor of the authoritative magazine, Les Flottes de Combat, so I think we can trust him as a most reliable source. Regardless of exact configuration, a total of fourteen 21.7" and eight 15.7" torpedoes were carried.
David Reasoner wrote:I forgot to mention that one of the problems with the trainable or rotating torpedo tube installations was that since the tubes were mounted outside the submarine's pressure hull, there was no practical way to reload them at sea and thus no reload torpedoes were carried for them. Once the torpedoes in those tubes had been fired, the rotating tubes were essentially useless until the submarine could return to base to have them reloaded.
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