engines including a 7-cylinder supercharged radial, the 4-cyl 40 hp used on the Demoiselle, a 4-cyl 100 hp used on 'Hanriot Etrich' monoplanes, and a V8 200 hp airship engine. In 1910 the Clement-Bayard Monoplane No. 1 was introduced at the Paris show. Jean Chassagne who was working on the development and testing, participating successfully in variety of early aviation challenges winning endurance, altitude and speed prizes. By 1912 Clément-Bayard built a biplane plus three different models of horizontally opposed aircraft engines. In November 1912 the Clement-Bayard Monoplane No. 5 was introduced. It was powered by a Gnome 7-cylinder rotary engine producing . The pilot sat in an aluminium-and-leather tub. In 1913 a three-seater biplane was introduced as part of the military project, the Clement-Bayard No. 6. It was configured for two observers in front of the pilot, and was powered by either a 4-cyl Clement-Bayard or 4-cylinder Gnome engine. In 1914 Clément-Bayard produced a steel scouting monoplane powered by either an motor or a Gnome et Rhône engine. The nickel steel armour was designed for protection against rifle fire. Airship manufacture In 1908 'Astra Clément-Bayard' began manufacturing airships at a new factory in La Motte-Breuil in response to a French Army decision to commence airship operations. The Clément-Bayard No.1 airship was offered to the French government but was too expensive so it was bought by Tsar Nicholas II for the Russian army. In 1910 the Clément-Bayard No.2, piloted by Maurice Clément, was the first airship to cross the Channel, travelling over 380 km in 6 hours. The army ordered 3 copies. The airship hangar in La Motte-Breuil is still maintained by Clément-Talbot Ltd. Clément-Bayard dirigibles Seven Clément-Bayard airships were completed. N° 1 was 56.25 metres long, 10.58 metres wide, 3,500 m3, powered by 2 Clément Bayard 115 cv engines. First flew on 28 October 1908. N° 2 was 76.50 metres long, 13.22 metres wide, 7,000 m3, powered by 2 Clément Bayard 120 cv engines. Top speed 54 km/h. First flew on 1 June 1910. N° 3 Dupuy de Lôme, 89 metres long, 13.5 metres wide, 9,000 m3, powered by 2 Clément Bayard 120 cv engines. First flew on 1 May 1912. N° 4 Adjudant Vincenot, 88.5 metres long, 13.5 metres wide, 9,800 m3, powered by 2 Clément Bayard 120 cv engines. Top speed 49 km/h. First flew in 1911. Adj Vincenot modified, 87.3 metres long, 13.5 metres wide, 9,800