page_title: Avro 504
section_title: Variants
hierarchical_section_title: Avro 504 / Variants
caption_attribution_description: English: Qantas Replica at Kingsford Smith International Airport (YSSY), Mascot.
context_page_description: The Avro 504 was a First World War biplane aircraft made by the Avro aircraft company and under licence by others. Production during the war totalled 8,970 and continued for almost 20 years, making it the most-produced aircraft of any kind that served in the First World War, in any military capacity, during that conflict. More than 10,000 were built from 1913 until production ended in 1940.
context_section_description: 504: 80 hp (60 kW) Gnome Lambda engine.
  Original model
  504A:
  Modified with smaller ailerons and broader struts. 80 hp (60 kW) Gnome engine.
  504B
  Version for RNAS with larger fin. 80 hp (60 kW) Gnome or Le Rhône engine.
  504C
  Single-seat anti-zeppelin aircraft for the RNAS. The 504C was fitted with an extra fuel tank, in place of the observer.
  504D
  Single-seat anti-zeppelin aircraft for the Royal Flying Corps. Six built.
  504E: 100 hp (75 kW) Gnome Monosoupape engine. Ten built.
  504F: 75 hp (56 kW) Rolls-Royce Hawk engine. One built.
  504G: 80 hp (60 kW) Gnome engine.
  504H
  Used for catapult trials. 80 hp (60 kW) Gnome engine.
  504J
  Used as a trainer. 100 hp (75 kW) Gnome or 80 hp (60 kW) Le Rhône engine.
  504K
  Two-seat training aircraft. The 504K had a universal mount to take different engines. Single-seat fighter (Comic) conversion used for anti-zeppelin work. Several were assembled in Australia by Australian Aircraft & Engineering. 130 hp (97 kW) Clerget 9B, 100 hp (75 kW) Gnome Monosoupape or 110 hp (82 kW) Le Rhône 9J engines.
  504K Mk.II
  Hybrid trainer based on 504K fuselage with 504N undercarriage and wings and powered by rotary engine. Built under licence in Mexico as Avro Anahuac.
  504L
  Floatplane version. 150 hp (110 kW) Bentley BR1, 130 hp (97 kW) Clerget or 110 hp (82 kW) Le Rhône engines.
  504M
  Three-seat cabin biplane. Only one was ever built. 100 hp (75 kW) Gnome engine.
  504N
  Two-seat training aircraft. Redesigned postwar trainer for RAF with 160 hp (120 kW) Armstrong Siddeley Lynx engine. 598 built.
  504O
  Floatplane version of 504N. First aircraft to fly above the Arctic Circle in 1923 Oxford Expedition.
  504P
  Unbuilt version of the 504N with side-by-side seating.
  504Q
  Three-seat cabin biplane. The 504Q was built for the Oxford University Arctic Expedition. Only one was ever built, powered by an Armstrong Siddeley Lynx engine.
  504R Gosport
  Reworked trainer with revised, lightweight structure. Five prototypes flown 1926 to 1927 with various engines (100 hp/75 kW Gnome Monosoupape, 100 hp/75 kW) Avro Alpha, (140 hp/104 kW) Armstrong Siddeley Genet Major and (150 hp/110 kW) Armstrong Siddeley Mongoose), with the Mongoose chosen for production aircraft. Ten were sold to Argentina, with 100 more built by FMA under licence in Argentina. Twelve were exported to Estonia, remaining in service until 1940, and an unknown number to Peru.
  504S
  Two-seat training aircraft. Built under licence in Japan by Nakajima.
  Yokosuka K2Y1
  Japanese version of the Avro 504N, given the long designation Yokosuka Navy Type 3 Primary Trainer, powered by a 130 hp (97 kW) Mitsubishi-built Armstrong Siddeley Mongoose radial piston engine, 104 built.
  Yokosuka K2Y2
  Improved version of the K2Y1, powered by a 160 hp (120 kW) Gasuden Jimpu 2 radial piston engine. 360 built (K2Y1 and K2Y2). Watanabe built aircraft were given the long designation Watanabe Navy Type 3-2 Land-based Primary Trainer.
  U-1 (Uchebnyi - 1) Avrushka
  Russian copy of the 504K. Over 700 built.
  MU-1 (Morskoy Uchebnyi - 1)
  Russian seaplane version.
  Orlogsværftet Flyvemaskineværksted LB.I - Danish production at the Royal Naval Dockyard (Orlogsværftet)
caption: Qantas Avro 504K replica with Sunbeam engine displayed at Qantas Domestic Terminal
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