View source for 12.8 cm FlaK 40

{{Infobox Weapon
|name=12.8 cm Flak 40 
|image=[[Image:German 12.8 cm Flak 40 - static mount.jpg|300px]]
|caption=A static mounted 12.8 cm Flak 40. 
|origin={{flag|Nazi Germany}}
|type=[[Anti-Aircraft]] 
<!-- Type selection -->
|is_ranged=yes
|is_artillery=yes
<!-- Service history -->
|service=1942 to 1945
|used_by=[[Nazi Germany]]
|wars=[[World War II]]
<!-- Production history -->
|designer=[[Rheinmetall|Rheinmetall-Borsig]] 
|design_date=1936
|manufacturer=[[Rheinmetall|Rheinmetall-Borsig]] 
|production_date=1942
|number=450 
|variants=12.8 cm FlaK 40<br>12.8 cm FlaK 40 Zwilling
<!-- General specifications -->
|weight=17,000 kg (37,478 lbs) 
|length=7.835 m (25.7 ft)
|part_length=61 calibers
|crew=
<!-- Ranged weapon specifications --> 
|cartridge= 
|caliber=128 mm (5.03 in)
|action= 
|rate of Fire=10 to 12 rounds per minute 
|velocity=880 m/s (2,887 ft/s)
|range=
|max_range=10,675 m (35,025 ft) 
|feed=Power rammer
|sights= 
<!-- Artillery specifications -->
|breech=Horizontal sliding 
|recoil=[[Hydropneumatic]]
|carriage=Static or railcar mounted.
|elevation=-3 to +88 degrees
|traverse=360 degrees
}}

The '''12.8&nbsp;cm FlaK 40''', was a [[Germany|German]] [[World War II]] [[Anti-aircraft warfare|anti-aircraft]] gun built as the successor to the [[88 mm gun]]. Although it was not produced in high numbers, it was one of the most effective heavy AA guns of its era. 

Development of the gun began in 1936, with the contract being awarded to [[Rheinmetall|Rheinmetall Borsig]], the first prototype gun was delivered for testing in late 1937 and completed testing successfully. The gun weighed nearly 12 tonnes in its firing position, with the result that its barrel had to be removed for transport. Limited service testing showed this was impractical, so in 1938 other solutions were considered.

The eventual solution was to simplify the firing platform, based on the assumption it would always be securely bolted into concrete. The total weight of the system reached 26.5&nbsp;tonnes, making it practically impossible to tow cross-country. In the end this mattered little, since by the time the gun entered production in 1942 the production of mobile guns larger than 105&nbsp;mm was prohibited. In August 1944 there were 450 such cannons available. As a result only a few were built and used, amongst other places, in the anti-aircraft [[flak tower]]s protecting [[Berlin]], [[Hamburg]], and [[Vienna]]. Approximately 200 were mounted on railcars, providing limited mobility.

The gun fired a 27.9&nbsp;kg (57.2-pound) shell at 880 m/s (2,890 ft/s) to a maximum ceiling of 14,800 m (48,556 ft). Compared with the 88mm FlaK 18 & 36, the 128 used a powder charge four times as great which resulted in a shell flight time only one-third as long. This made aim against fast-moving targets much easier. 

==Variants==
[[Image:12.8 cm Flakzwilling 40 1.jpg|right|thumb|Flakzwilling 40 at [[United States Army Ordnance Museum|US Army Ordnance Museum]].]]
* '''12.8&nbsp;cm FlaK 40''' 
* '''12.8&nbsp;cm FlaK 40 Zwilling''' Twin mounted anti-aircraft, capable of firing 20 rounds per minute.

==External links==
* http://www.429sqn.ca/flak.htm
* 12.8&nbsp;cm FlaK 40 Zwilling on display at the [[U.S. Army Ordnance Museum]]: http://ordmusfound.org/flak40.html

== References ==
* Gander, Terry and Chamberlain, Peter. ''Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939-1945''. New York: Doubleday, 1979 ISBN 0-385-15090-3
* Hogg, Ian V. ''German Artillery of World War Two''. 2nd corrected edition. Mechanicsville, PA: Stackpole Books, 1997 ISBN 1-85367-480-X
* {{cite book | last = Hogg | first = Ian V. | authorlink = Ian V. Hogg | date = 2002 | title = Anti-aircraft artillery | publisher = Crowood Press | location =  | isbn = 1-86126-502-6 }}

{{commonscat|12.8 cm Flak 40}}

{{WWIIGermanGuns}}

[[Category:Anti-aircraft guns of Germany]]
[[Category:World War II anti-aircraft guns]]
[[Category:128 mm artillery]]

{{artillery-stub}}

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