page_title: Airco DH.9A
section_title: Variants
hierarchical_section_title: Airco DH.9A / Variants
caption_attribution_description: English: Polikarpov R-1 #R-ROST 'ISKRA' (in Russian/upper and Ukrainian/under languages) Русский: Самолет Р-1 «Искра»
context_page_description: The Airco DH.9A was a British single-engined light bomber designed and first used shortly before the end of the First World War. It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucially, replacing the under-powered and unreliable inline 6-cylinder Siddeley Puma engine of the DH.9 with the American V-12 Liberty engine.
  Colloquially known as the "Ninak", it served on in large numbers for the Royal Air Force following the end of the war, both at home and overseas, where it was used for colonial policing in the Middle East, finally being retired in 1931. Over 2,400 examples of an unlicensed version, the Polikarpov R-1, were built in the Soviet Union, the type serving as the standard Soviet light bomber and reconnaissance aircraft through the 1920s.
context_section_description: Airco DH.9A:  Original version.
  de Havilland DH.9AJ: Single prototype with Bristol Jupiter engine.
  de Havilland DH.9R: Racing aircraft with sesquiplane wings and powered with a Napier Lion engine – (one built).
  Airco DH.15 Gazelle: DH.9A fitted with a BHP Atlantic inline engine, one conversion
  Airco DH.16: Civil transport with widened fuselage seating four passengers in a glazed cabin behind the pilot, who sat in an open cabin, nine built.  Rolls Royce Eagle or Napier Lion Engine.
  de Havilland DH-49 – proposed modernised version with Eagle IX engine (not built)
  Engineering Division USD-9A:  United States built version, 9 built. One modified with a pressurised cockpit.
  Engineering Division USD-9B:  USD-9A fitted with more powerful Liberty engine and greater area wings.
  Armstrong Whitworth Tadpole  One prototype conversion for a naval three-seat spotter/reconnaissance aircraft.
  Westland Walrus  Production version of the Tadpole conversion with the Napier Lion III engine (36 built).
  Polikarpov R-1 and R-2 Copy of DH.9A built in Soviet Union, originally at Duks Aircraft Works, supervised by Nikolai Nikolaevich Polikarpov.  Early aircraft were powered by Mercedes D.IV or Armstrong Siddeley Puma engines, but most were powered by the M-5 copy of the Liberty Engine. Over 2,400 built from 1922 to 1932.
  Polikarpov R-1 BMW: R-1 fitted a 240 hp (179 kW) BMW IVa engine, 20 built.
  Polikarpov MR-1: Twin-float seaplane version, 124 built.
  Polikarpov PM-2: Prototype floatplane fitted with metal floats.
  Polikarpov R-4: R-1 with better forward view and CG position, forward profile cleaned up with fairings and a retractable ventral radiator. Stronger landing gear. No production but changes incorporated into late R-1s.
caption: Polikarpov R-1
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