View source for Avro 636

<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{{Use dmy dates|date=May 2017}}
{{Use British English|date=May 2017}}
{|{{Infobox Aircraft Begin
  |name = Type 636<!--please avoid stating manufacturer in this field; it's stated two lines below -->
  |image = <!--in the ''image:filename'' format, no image tags-->
  |caption = <!--image caption; if it isn't descriptive it should be left blank-->
}}{{Infobox Aircraft Type
  |type = Fighter Trainer
  |manufacturer = [[Avro]]
  |national origin=United Kingdom
  |designer = [[Roy Chadwick]] 
  |first flight = 1935 
  |introduced = 1935 
  |introduction= <!--date the aircraft will enter military or revenue service, if the aircraft is still in development -->
  |retired = <!--date the aircraft left military or revenue service. If vague or multiples, it probably should be skipped-->
  |status = <!--in most cases, this field is redundant; use it sparingly-->
  |primary user = [[Irish Air Corps]] 
  |more users = <!--limited to three "more users" total. please separate with <br/>-->
  |produced = 1935 
  |number built = 4
  |unit cost = 
  |developed from = <!-- the aircraft which formed the basis for the topic type -->
  |variants with their own articles = <!-- variants OF the topic type -->
}}
|}

The '''Avro 636''' was a single-engined [[United Kingdom|British]] [[fighter aircraft|fighter]]-[[trainer (aircraft)|trainer]] built by [[Avro]] in the mid-1930s. Four were built for the [[Irish Air Corps]].

==Development==
The '''Avro 636''' was designed in November 1934 by [[Roy Chadwick]], Avro's chief designer as a one or two-seat fighter-trainer, and was planned to reproduce the flying characteristics of single-seat fighters. It had a similar structure to the [[Avro Tutor|Tutor]], with a welded steel tube [[fuselage]].<ref name="jackson avro">{{cite book |last= Jackson|first= A J |title=Avro Aircraft since 1908 |edition= 2nd|year= 1990 |publisher= Putnam Aeronautical Books|location= London |isbn= 0-85177-834-8}}</ref>

The aircraft was designed to be operated as a single or two seater, with the provision for fitting two forward firing .303&nbsp;in (7.7&nbsp;mm) [[Vickers machine gun]]s.

==Operational history==
Four Avro 636s were ordered by the [[Irish Air Corps]] in December 1934. These aircraft were powered by old [[Armstrong Siddeley Jaguar]] IVC engines, which had originally been purchased by the Irish in 1930 for use in [[Vickers Vespa]] army co-operation aircraft. Although the Jaguar IVC powered aircraft was planned to be designated as the '''Avro 667''', they were always referred to as Avro 636s.<ref name="jackson avro"/>

The four aircraft were delivered in August 1935, and remained in service for several years.

==Variants==
;Avro 636: Basic design, originally planned to be powered by 420&nbsp;hp (313&nbsp;kW) Armstrong Siddeley Jaguar IV engine.
;Avro 636A: Version powered by 680&nbsp;hp (510&nbsp;kW) [[Armstrong Siddeley Panther]] XI engine.
;Avro 667: Version powered by unsupercharged 460&nbsp;hp (340&nbsp;kW) Armstrong Siddeley Jaguar IVC. Four built for Irish Air Corps. Known as Avro 636 in service.

==Operators==
;{{IRL}}
*[[Irish Air Corps]]

==Specifications (Avro 667)==
{{aircraft specifications
|plane or copter?=plane 
|jet or prop?=prop
Avro Aircraft since 1908 <ref name="jackson avro"/> 
|crew=Two
|capacity=
|length main= 27 ft 6 in
|length alt= 8.38 m
|span main= 33 ft 0 in
|span alt= 10.06 m
|height main= 11 ft 7 in
|height alt= 3.53 m
|area main= 261 ft²
|area alt= 24.3 m²
|airfoil=
|empty weight main= 2,766 lb
|empty weight alt= 1,255 kg
|loaded weight main= 3,271 lb
|loaded weight alt= 1,484 kg
|useful load main= 
|useful load alt= 
|max takeoff weight main= 
|max takeoff weight alt= 
|more general=
|engine (prop)=[[Armstrong Siddeley Jaguar]] IVC 
|type of prop=14-cylinder air-cooled double radial engine
|number of props=1
|power main= 460 hp
|power alt= 343 kW
|power original=
|max speed main= 152 kn
|max speed alt= 175 mph, 282 km/h
|cruise speed main=  
|cruise speed alt=  
|never exceed speed main=  
|never exceed speed alt=  
|stall speed main=  
|stall speed alt=  
|range main=  
|range alt=  
|ceiling main= 18,000 ft
|ceiling alt= 5,500 m
|climb rate main= 1,200 ft/min
|climb rate alt= 6.1 m/s
|loading main= lb/ft²
|loading alt= kg/m²
|thrust/weight=<!-- a unitless ratio -->
|power/mass main= hp/lb
|power/mass alt= W/kg
|more performance=
|armament=
|avionics=
}}

==See also==
{{aircontent|
<!-- include as many lines are appropriate. additional lines/entries with carriage return. -->
|related=<!-- related developments -->
|similar aircraft=<!-- similar or comparable aircraft -->
|sequence=<!-- designation sequence, if appropriate -->
|lists=<!-- related lists -->
|see also=<!-- other relevant information -->
}}

==References==
{{commons category|Avro aircraft}}
{{Reflist}}

==External links==

{{Avro aircraft}}

[[Category:Single-engined tractor aircraft]]
[[Category:British military trainer aircraft 1930–1939]]
[[Category:Avro aircraft|636]]
[[Category:Biplanes]]