And... wrap!
23. The Handelszerstörers turned carriers
When the Z-Plan was finalized in 1938, twelve P-class armoured cruisers were planned to form a powerful raiding force, hunting for British merchant shipping all around the globe. Their presence should force the British to deploy their battleships everywhere, weakening the Home Fleet to the point it became manageable for Germany's core force of ten battleships (Scharnhorst-, Bismarck- and J-classes). Apart from the fact that this plan was timed to become effective not before 1945, several years after Hitler's armament frenzy would have utterly bankrupted the German state, and did not figure in what the British might build during that time, the ships themselves were of questionable quality. As on the L-class cruisers, all combat parameters were made subordinate to extreme speed (165.000hp diesels for 35 knots) and range (15.000 miles at 20 knots) requirements. Their long, sleek hulls displaced over 22.000 tons, but carried only six 280mm, six 150mm and eight 105mm guns each; protection was sufficient to keep 203mm shells out of the vitals, but no good against even old and weak battleships. When the war started, none had been laid down. In November 1939, the planned number of 12 was cut to eight, and the switch of all diesel engine production to submarine propulsion required a complete redesign. For the cruisers P through W, the names Goeben, Derfflinger, von der Tann, Zieten, Yorck, Mackensen, Schwerin and Roon were proposed, although none were formally named. After several alternatives had been studied, a slightly downsized vessel with 136.000hp turbines on two shafts (reportedly the same swiss-made BBC engines which were ordered by the Soviets for their Sovetskij-Soyuz-class battleships) and a speed of 32 knots was selected; range was cut to 10.000 miles and protection remained the same. Main and secondary armament was retained, but the heavy flak was increased to twelve 105mm guns in six newly developed twin turrets (same as planned for the J-class battleships). The design to which the ships were eventually laid down looked like this:
As four 280mm turrets (removed from Gneisenau in 1940) were readily available, the first two of the class could be laid down in April and June 1941 at Blohm&Voss in Hamburg and the Kriegsmarinewerft in Wilhelmshaven, respectively. Two more were to follow early in 1942, but were postponed for a year in September 1941 due to more pressing requirements. They were the last capital ships to be laid down for the Kriegsmarine; although they were not formally axed before January 1943, the third and later ships of the class were never started. After the battle of Faroer in November 1941, requirements were revised; the Handelszerstörers were re-designed as full-fledged fleet carriers, for which role their hull size and shape was (rightly) considered particularly suitable. Their design showed that many good lessons had been learned from the oversized, wasteful Graf Zeppelins. Their hulls received enclosed bows for optimum seakeeping, got rid of the redundant LA artillery and could accommodate a larger air component (48 versus 42) despite being a third smaller. The carrier conversion was finalized in July 1942; as the ships were not very advanced on their stocks, only a small delay would ensue for the first two, and the next two could actually be moved forward on the time scale, because no new main armament would have to be produced. The final carrier design looked like this:
By late 1942, the Kriegsmarine optimistically expected to lay hands on the first pair in mid-1944, and lay down the second pair in early 1943 for completion in late 1945. Hitler's order to abandon all capital ship production in January 1943 ended the project; the hulls of P and Q, which were nowhere near launch readiness, were scrapped on their slips during the first half of 1943. If the Germans had bothered developing proper aircraft for them - they had an excellent long-range naval fighter in the shape of the BV-155, but in the antiship role were stuck with the antiquated Ju-87 - they would have made reasonably capable carriers, although their flight decks were still unarmoured and their hangars fully enclosed. On the plus side, they had an armoured main deck of 100mm, carried a good-sized air group, were well protected against underwater attack and had a powerful flak battery of 12 105mm guns and 24 fully automatic 37mm guns, plus 48 20mm cannon.
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GD