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{{Infobox weapon
|name=Bofors 25 mm M/32
| image=Bofors 25 mm akan.jpeg
| image_size=300
|caption=Bofors 25 mm automatic cannon M/32 on a Swedish submarine.
|origin=[[Sweden]]
|type=[[Anti-aircraft gun]]
<!-- Type selection -->
Line 23:
|production_date=1932–1945
|number=
|variants=M/38 25 x 18725×187 mm R<ref name=":0">{{Cite web|url=http://www.quarryhs.co.uk/ammotable3.html|title=21-29 MM CALIBRE CARTRIDGES|website=www.quarryhs.co.uk|access-date=2017-09-20|archive-date=2019-04-07|archive-url=https://web.archive.org/web/20190407134003/http://www.quarryhs.co.uk/ammotable3.html|url-status=dead}}</ref>
<!-- General specifications -->
|weight=Single: {{convert|570|kg|lb|abbr=on}}<br>Twin: {{convert|1100|kg|lb|abbr=on}}
|length=
|part_length={{convert|1.6|m|ftin|abbr=on}} L/64<ref name=":1">{{Cite web|url=http://www.quarryhs.co.uk/Bofors.htm|title=BOFORS AUTOMATIC CANNON|website=www.quarryhs.co.uk|access-date=2017-09-20|archive-date=2012-12-28|archive-url=https://web.archive.org/web/20121228005723/http://www.quarry.nildram.co.uk/Bofors.htm|url-status=dead}}</ref>
|width=
|height=
|crew=
<!-- Ranged weapon specifications -->
|cartridge=[[Glossary of British ordnance terms#Fixed QF|Fixed QF]] 25 x 20525×205 mm R
|cartridge_weight={{convert|.25|kg|lboz|abbr=on}}
|caliber={{convert|25|mm|in|abbr=on}}<ref name=":0" />
|action=Long-recoil
|rate=120160 rpm
|velocity={{convert|850|m/s|ft/s|abbr=on}}
|range={{convert|3.5|km|ft|abbr=on}} AA ceiling
|max_range={{convert|5.6|km|ft|abbr=on}} Horizontal range<ref>{{Cite web|url=http://www.navypedia.org/arms/sweden/sw_guns.htm|title=Swedish guns|website=www.navypedia.org|access-date=2017-09-20}}</ref>
|feed=6 -round clips
|sights=
<!-- Artillery specifications -->
|breech=
|recoil=[[Glossary of British ordnance terms#Hydro-spring|Hydro-spring]]
|carriage=Single or twin fixed pedestal mounts<ref name=":1" />
|elevation=-5−5° to 90°
|traverse=360°
<!-- Explosive specifications -->
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}}
 
The '''Bofors 25 &nbsp;mm M/32''' was a Swedish- designed and built light [[anti-aircraft gun]] that was used aboard ships of the [[Swedish Navy]] during the [[Second World War]].
 
==History==
The development of [[Bofors]] first automatic weapons began in 1925 when the Navy requested the development of a 20 &nbsp;mm [[Anti-aircraft warfare|anti-aircraft gun]]. In 1928 the Navy requested a new [[Bofors 40 mm gunAutomatic Gun L/60|40mm40 mm AA gun]] and a 25 &nbsp;mm AA gun which was produced in parallel and known as the M/32.<ref name=":1" />
 
==Design==
[[File:Anti aircraft gun on HMS Gävle.jpg|thumb|left|A twin M/32 mount aboard HSwMS ''Gävle'']]
The M/32 was designed with a barrel 64 [[Caliber (artillery)|calibers]] in length, fired a 25 x 205 mm R25×205mmR cartridge, at 160-180160–180 rpm and with a muzzle velocity of 850 &nbsp;m/s. Later a shorter version firing a 25 x 187 mm R25×187mmR cartridge was produced in limited numbers. The M/32 looked similar to its larger 40 &nbsp;mm sibling and used the same [[Recoil operation|long-recoil]] operating system and [[hydro-spring]] recoil mechanism. Its feed mechanism consisted of 6-round clips which were held in a vertical frame above the gun breech. Two clips were mounted side by side so that continuous fire could be maintained without the need to pause and change magazines. The clips were in two halves, which split and fell away as the cartridges entered the frames.<ref name=":1" />
 
The gun was available in fixed single mount, fixed twin mount or on a mobile four-wheeled carriage with twin collapsible [[Gun carriage#Modern gun carriages|outriggers]]. In addition to fixed pedestal mounts, a [[Disappearing gun|retractable gun]] mount was designed for submarine use. Although available in land mounts it was primarily a naval weapon. At first the 40 &nbsp;mm gun was considered to be too heavy, so early preference was given to single and twin mounts of the M/32 aboard ships of the Swedish navy.<ref name=":1" />
 
==Gallery==
<gallery widths="175" mode="nolines">
File:AA gun on HMS Malmö.jpg|A single M/32 mount aboard HSwMS ''Malmö''
File:Old artillery at Vaxholms kastell (19829783670).jpg|A single M/32 mount at [[Vaxholm Fortress]], Sweden.
File:Bofors 25 mm gun at Vaxholm Castle.jpg|A twin M/32 at Vaxholm Fortress, Sweden.
File:Automatic gun - Bofors -1932 - Vaxholm Castle.jpg|A twin M/32 at Vaxholm Fortress, Sweden.
</gallery>
 
==See also==
*[[25 mm Hotchkiss anti-aircraft gun]]
*[[25 mm automatic air defense gun M1940 (72-K)]]
*[[Type 96 25 mm AT/AA Gun]]
 
==Notes==
{{Reflist|20em}}
 
==External linksBibliography==
* Gander, T 1990, ''The 40mm Bofors Gun'', 2nd edn, Patrick Stephens, Wellingborough, Eng.
* http://www.quarryhs.co.uk/Bofors.htm
 
* http://www.navypedia.org/arms/sweden/sw_guns.htm
==External links==
* http://www.quarryhs.co.uk/ammotable3.html
* http://www.quarryhs.co.uk/Bofors.htm {{Webarchive|url=https://web.archive.org/web/20121228005723/http://www.quarry.nildram.co.uk/Bofors.htm |date=2012-12-28 }}
* http://www.quarryhs.co.uk/ammotable3.html {{Webarchive|url=https://web.archive.org/web/20190407134003/http://www.quarryhs.co.uk/ammotable3.html |date=2019-04-07 }}
 
{{Weapons made in Sweden 1914–1945|style=wide}}
 
{{DEFAULTSORT:Bofors 25 mm M/32}}
[[Category:25 mm artillery]]
[[Category:Anti-aircraft guns]]
[[Category:World War II anti-aircraft guns]]
[[Category:Naval guns of Sweden]]
[[Category:World War II naval weapons]]
[[Category:ArtilleryAnti-aircraft guns of Sweden]]
[[Category:Bofors]]
[[Category:Autocannon]]
Retrieved from "https://en.wikipedia.org/wiki/Bofors_25_mm_M/32"