military airship (used by the United States Army) built in the USA. Manufacturer: Goodyear, maiden flight: 1926. Raab-Katzenstein 27 - maiden flight: 1929-05-04 Nobile's company designed or built the following airships: T 34 Roma, 33,810 m3, sold to the US, successfully crossed Atlantic and later destroyed after collision with high tension wires N 1 Norge, 19,000 m3, reached the North Pole in 1926 N 2 a 7000 m3-airship built in hangars at Augusta, Sicily N 3 Sold to Japan as naval Airship No. 6, first flight on 1927-04-06. It was lost in 1927 after encountering a typhoon in the Pacific. There were no fatalities N 4 Italia Flew to Svalbard for Arctic expedition 1928, crashed after third polar flight on return from North Pole N 5 was a project for a 55,000 cubic metre keel airship, many times interrupted, eventually abandoned 1928 Nobile-designed airships of the Russian airship program, such as the Soviet SSSR-V6 OSOAVIAKhIM (1934–1938) The Fujikura company built the No. 8 semi-rigid airship for the Japanese Navy to replace the Nobile N 3, basing the design on the latter airship. The airship set a record for an endurance flight of 60 hours and 1 minute on 17 July 1931, a record later broken by the Soviet OSOAVIAKhIM. Current developments , the only manned semi-rigid model of airship in active operation is the Zeppelin NT. It comprises a single gas cell kept at a slight over-pressure, ballonets to maintain constant volume, and a triangular keel structure internal to the cell. Three of these will be American-based airships. CL160 "Cargolifter" was an unrealised design of the now liquidated German Cargolifter AG (1996–2003). Cargolifter Joey was a small semi-rigid experimental airship produced to test the design See also Airship hangar Rigid airship Non-rigid airship References Notes Bibliography Belokrys, Aleksei. Deviat'sot chasov neba. Neizvestnaia istotriia dirizhablia "SSSR-V6" [Nine Hundred Hours in the Sky. The Unknown History of the Airship "SSSR-V6"]. Moscow, Russia: Paulsen, 2017. (in Russian). External links Images of a Flight Simulator model of Nobile's N5 Airship configurations