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No. 6 (airship) – Construction started immediately after the loss of No. 5, and completed by early September. Similar to No. 5, but with a larger envelope 22 m (72 ft 2 in) long and capacity of 622 m3 (22,000 cu ft). Won the Deutsch de la Meurth prize on 19 October 1901. (1901)
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No. 20 Demoiselle – A modification of No. 19, considered to be the first practical ultralight aircraft. (1908)
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No. 7 (airship) – A fast competition airship, built to compete for the aviation prizes on offer at the 1904 St Louis World's Fair. Before the competitions the airships envelope was sabotaged, preventing him from competing. Had a double-thickness varnished silk envelope, 50 m (160 ft) long, 7.92 m (26.0 ft) diameter: capacity 1260 m3 (44,500 ft3). It was powered by a 60 hp water-cooled engine, driving two propellers, one at the front and one at the rear of the gondola., (1902)
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No. 21 Demoiselle (1909)
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No. 16 (hybrid airship) – 21 m long, 3 m diameter: capacity 99 m3. Fitted with a forward-mounted hexagonal elevator and a central 4 m span rectangular lifting surface, this was a hybrid airship incapable of flight relying solely on aerostatic buoyancy, instead requiring aerodynamic lift to fly. Tested unsuccessfully on 8 July 1907. (1907)
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No. 1 (airship) – First flown on 18 September 1898. Had a cylindrical envelope with conical ends containing a ballonet connected to an air pump: 25 m (82 ft) long, 3.5 m (11 ft 6 in) diameter, 180 m3 (6,400 cu ft) capacity. A square basket was suspended from wooden battens contained in pockets in the envelope, and a silk-covered rudder fitted behind and above the basket. Powered by a De Dion-Bouton tricycle engine (modified to have tandem cylinders) of 3 hp which was mounted outside and in front of the basket driving a small two-bladed propeller. Fore-and-aft trim was achieved by moving a pair of ballast bags. Manoeuvred well, but the ballonet was too small to retain the necessary rigidity of the envelope, and loss of pressure caused it to be wrecked on its second flight on 20 September. (1898)
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