Editing Avro 504 (section)

{{Short description|1913 multi-role military aircraft family}}
{{Use dmy dates|date=September 2019}}
{{Use British English|date=May 2017}}
{{Infobox aircraft
|name =Avro 504
|image = Avro 504K - Shuttleworth Uncovered 2015 (23172958672).jpg
|type = [[Trainer (aircraft)|Trainer]], [[Fighter aircraft|fighter]], [[bomber]]
|manufacturer = [[Avro]]
|designer = <!--only appropriate for single designers, not project leaders-->
|first_flight=18 September 1913<ref name="Holmes">Holmes, 2005. p 23.</ref>
|introduction = 1913
|retired = 1934
|status =  <!--in most cases, this field is redundant; use it sparingly -->
|primary_user = [[Royal Flying Corps]]
|more_users = [[Royal Naval Air Service]]<!--up to three more. please separate with <br />.-->
|produced = 1913–1932<!--years in production-->
|number_built = 11,303 including Japanese, Soviet and other foreign production<ref>{{cite web |url=http://britishaviation-ptp.com/avro504.html |title=Avro 504 |website=britishaviation-ptp.com |access-date=23 January 2019}}</ref>
}}

The '''Avro 504''' is a single-engine [[biplane]] [[bomber]] made by the [[Avro|Avro aircraft company]] and under licence by others. Production during [[World War I]] totalled 8,970 and continued for almost 20 years,<ref name="Holmes"/> making it the most-produced aircraft of any kind that served in any military capacity during the First World War. More than 10,000 were built from 1913 until production ended in 1932.<ref>{{cite web |url=http://britishaviation-ptp.com/avro504_foreignderiv.html |title=Avro 504 (Foreign Derivatives) |website=britishaviation-ptp.com |access-date=23 January 2019}}</ref><ref name="BAE Systems">{{Cite web |title=Avro 504J & Avro 504K |url=https://www.baesystems.com/en/heritage/avro-504j---avro-504k |access-date=2022-11-17 |website=BAE Systems {{!}} International |language=en}}</ref>