with the company also using the former RAF Holme-on-Spalding Moor. Before production shifted to Sherburn-in-Elmet and Brough from the Leeds site, aircraft were flown in and out of Olympia works by an adjacent airstrip in Roundhay Park. Aircraft Blackburn First Monoplane (1909) – Single-engine, single-seat high-wing monoplane aircraft Blackburn Second Monoplane (1911) – Single-engine midwing monoplane aircraft. Blackburn Mercury (1911) – Single-engine, two-seat midwing monoplane training aircraft Blackburn Type B (1912) – Single-engine, two-seat midwing monoplane training aircraft. A development of the Blackburn Mercury Blackburn Type D (1912) – Single-engine single-seat mid-winged monoplane. Preserved in flying condition by the Shuttleworth Collection at Old Warden, and survives as the oldest British-built aircraft. Blackburn Type E (1912) – Single-engine, midwing metal-framed monoplanes, one single-seater one twin. Blackburn Type I (1913) – Single-engine 1/2-seat mid-wing monoplane built both as land- and seaplane. Blackburn Type L (1914) – Single-engine two-seat biplane seaplane. AD Scout (1915) – Admiralty designed single-engine, single-seat pusher anti-Zeppelin aircraft. Two each built by Blackburn and by Hewlett & Blondeau. Blackburn Twin Blackburn (1915) – Twin-fuselage, two-engine, two-seat anti-Zeppelin seaplane. Blackburn General Purpose (1916) – Twin-engine three-seat seaplane biplane anti-submarine patrol bomber. Blackburn Triplane (1916) – Blackburn-designed triplane version of Scout Blackburn White Falcon (1916) – Single-engine two-seat mid-wing monoplane. Blackburn R.T.1 Kangaroo (1918) – Twin-engine, three-seat biplane reconnaissance/torpedo bomber Blackburn N.1B (1918) – Single-engine single-seat biplane flying boat escort bomber (started; not finished; never flew). Blackburn Blackburd (1918) – Single-engine, single-seat biplane torpedo bomber Blackburn Sidecar (1919) Single-engine two-seat mid wing monoplane ultra light: may not have flown. Blackburn T.1 Swift (1920) – Single-engine, single-seat floatplane torpedo bomber Blackburn T.2 Dart (1921) – Single-engine, single-seat biplane torpedo bomber Alula D.H.6 (1921) – Experimental aircraft to test the Alula wing using an Airco DH.6 fuselage. Alula Semiquaver (1921) – Single-engine Alula wing conversion of the Martinsyde Semiquaver. Blackburn R.1 Blackburn (1922) – Single-engine, three-seat biplane naval spotter/reconnaissance aircraft. Blackburn Pellet (1923) – Single-engine single-seat biplane Schneider racer. Blackburn Bluebird (1924) – Single-engine, two-seat biplane training/touring aircraft Blackburn T.4 Cubaroo (1924) – Single-engine, four-seat large biplane torpedo bomber. Blackburn T.3 Velos (1925) – Single-engine, two-seat biplane bomber floatplane Blackburn R.2 Airedale (1925) – Single-engine three-seat high-wing monoplane reconnaissance. Blackburn T.5 Ripon (1926) – Single-engine, two-seat biplane reconnaissance/torpedo bomber Blackburn Sprat (1926) single-engine two-seat biplane advanced trainer. Blackburn R.B.1 Iris (1926) – Three-engine, five-seat biplane flying boat Blackburn F.1 Turcock (1928) – Single-engine