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German shipyards and the evolution of the U-bootwaffe (1932-1939). Type IX A.
At the same time, the Type IX A, which replaced the Type I A, entered series production at the shipyard Deschimag AG Weser, Bremen. On July 29, 1936 four units of this type were ordered, from U 37 to U 40, and on November 21, 1936, were ordered four more from U 41 to U 44. In order to achieve the construction of the hull in the shortest possible time, the construction in sections, which was later taken by the other shipyards for the type VII C series production, had been introduced into the shipyard specifically for the production of the Type IX. The first three U boats Type IX A entered service in 1938 (U 37, 38 and 39) and the last five entered service the following year, 1939 (U 40, 41, 42, 43 and 44). The U 43 was the last to be commissioned before the war (August 26, 1939), while U 44 entered service only on November 4, 1939.
The Type IX was a double-hull ocean-going U boat, the design of which was derived from the U 81-U 86 series of 1916, which in many aspects resembled the Type IA design of 1936. Comparing with the Type VII, which was almost contemporary, the Type IX had a greater displacement, more habitability and, above all, a greater range of action, since it was designed for operations far from its base of operations. By design, the two types differed completely. Instead of the individual hull with ballast tanks as the Type VII, this design had double hull. This was mainly to achieve better surface navigability. In addition, part of the fuel was stored in the space between both hulls. In this double hull were also located all the ballast tanks. In the upper deck was mounted a 10.5 cm L / 45 gun and a Flak 2 cm gun, the latter on a platform behind the conning tower.
In the construction of the U boats Type IX A, intervened a single shipyard, Deschimag AG Weser, Bremen (8 units).
Sources: Vom Original zum Modell. Uboot Typ II.
2. U-BOOT Medal, Document, Wehrpass & CAP Grouping - KIA - U-41 - TOP! .. Historical Media, LLC
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