Description
The P Class was an enlarged version of the preceding M class. On 5 August 1914 the Zeppelin company proposed a design based on the LZ 26 to the German Navy Ministry. This had been originally planned as a passenger carrying craft for DELAG and was the first Zeppelin with a duralumin framework which had the strengthening keel inside the hull structure. The proposed design was larger, and a fourth 210 hp 160 kW Maybach CX six-cylinder engine was added, allowing a greater range and payload. Later examples were fitted with four 240 hp 180 kW Maybach HSLu engines. The P Class also introduced enclosed crew accommodation, as the gondolas of the previous M class Zeppelins were open.
Faced by increasingly effective defensive measures, Zeppelin introduced the Q Class in late 1915. Internal volume was inflated by lengthening the hull by 49 ft (15 meters), increasing its operating ceiling by about 1,500 ft (460 meters). Many of the existing P Class airships were similarly lengthened.