Editing Q and R-class destroyer (section)

{{Short description|Class of 16 British destroyers, ordered in 1940}}
{{for|another use|R-class destroyer (1916)}}
{{Use dmy dates|date=January 2018}}
{{Use British English|date=January 2018}}
{{more citations needed|date=January 2013}}
{|{{Infobox ship begin|sclass=2}}
{{Infobox ship image
|Ship image=File:Aankomst Hr. Ms. Banckert te Den Helder, Bestanddeelnr 903-0116.jpg
|Ship caption= [[HMS Quilliam (G09)|HNLMS ''Banckert'']] on 20 September 1948
}}{{Infobox ship class overview
|Builders=
|Operators=*{{navy|United Kingdom}}
*{{naval|Australia|1913}}
*{{naval|Netherlands}}
*{{naval|India|1950}}
|Class before={{sclass2|O and P|destroyer|4}}
|Class after={{sclass2|S and T|destroyer|4}}
|Subclasses=Q, R
|Built range=
|In commission range=
|Total ships building=
|Total ships planned=
|Total ships completed=16
|Total ships cancelled=
|Total ships active=
|Total ships laid up=
|Total ships lost=2 (+1 expended)
|Total ships retired=13
|Total ships preserved=
}}{{Infobox ship characteristics
|Hide header=
|Header caption=Q class<ref name="lenton">''British and Empire Warships of the Second World War'', H. T. Lenton, Greenhill Books, {{ISBN|1-85367-277-7}}</ref>
|Ship type= [[Destroyer]]
|Ship displacement=*{{convert|1,692|LT|t|0|abbr=on}}
*{{convert|2,411|LT|t|0|abbr=on}} full load
|Ship length={{convert|358.25|ft|m|1|abbr=on}} [[Length overall|o/a]]
|Ship beam={{convert|35.75|ft|m|1|abbr=on}}
|Ship draught={{convert|9.5|ft|m|1|abbr=on}}
|Ship propulsion=2 × [[Admiralty three-drum boiler]]s, [[Parsons Marine Steam Turbines|Parsons]] geared steam turbines, {{convert|40000|shp|abbr=on}} on 2 shafts
|Ship speed={{convert|36|kn|km/h|abbr=on}}
|Ship range={{convert|4675|nmi|km|abbr=on}} at {{convert|20|kn|km/h}}
|Ship complement=176 (225 as [[flotilla leader]])
|Ship sensors=*Radar Type 290 air warning
*Radar Type 285 ranging & bearing 
|Ship EW=
|Ship armament=* 4 × [[4.7 inch QF Mark IX|QF {{convert|4.7|in|mm|abbr=on}} Mk.IX guns]], single mounts CP Mk.XVIII
* 4 × [[QF 2 pounder naval gun|QF 2 pdr Mk.VIII]] (40 mm L/39), quad mount Mk.VII
* 6 × [[Oerlikon 20 mm cannon|QF 20&nbsp;mm Oerlikon]], single mount P Mk.III
* 8 (2×4) tubes for [[British 21 inch torpedo|{{convert|21|inch|mm|abbr=on|0}} torpedoes Mk.IX]]
* up to 3 × throwers & 3 × racks, to 45 [[depth charge]]s 
|Ship notes=
}}{{Infobox ship characteristics
|Hide header=
|Header caption= (R class)
|Ship displacement=*{{convert|1,705|LT|t|0|abbr=on}}
* {{convert|2,425|LT|t|0|abbr=on}} full load
|Ship complement= 176 (237 in leader)
|Ship armament= 4 × throwers & 2 × racks, 70 depth charges
|Ship notes=  Other characteristics as per Q class
}}
|}
The '''Q and R class''' was a [[ship class|class]] of sixteen [[War Emergency Programme destroyers|War Emergency Programme]] [[destroyer]]s ordered for the [[United Kingdom|British]] [[Royal Navy]] in 1940 as the '''3rd''' and '''4th Emergency Flotilla'''. They served as [[convoy]] escorts during [[World War II]]. Three Q-class ships were transferred to the [[Royal Australian Navy]] upon completion, with two further ships being handed over in 1945. ''Roebuck'' had the dubious honour of being [[Ceremonial ship launching|launched]] prematurely by an air raid at [[Scotts Shipbuilding & Engineering Company|Scotts]] shipyard in [[Greenock]], her partially complete hulk lying submerged in the dockyard for nine months before it was salvaged and completed.<ref name="lenton"/>