8 cm FK M. 5

The 8 cm Feldkanone M.5 was a field gun used by Austria-Hungary during World War I. It was a conventional design, with its most notable feature being its obsolescent autofrettaged bronze (so-called steel-bronze) barrel, necessary because Austria-Hungary still had trouble making steel of the proper quality. Its development was quite prolonged as the Austrians took years to decide on the proper recoil system and type of breech. Even then production difficulties prevented its introduction into service until 1907.[4]

8 cm Feldkanone M. 5
TypeField gun
Place of originAustria-Hungary
Service history
In service1907–45
Used byAustria-Hungary
Austria
Czechoslovakia
Nazi Germany
Hungary
Italy
Yugoslavia
WarsWorld War I
Second Italo-Ethiopian War
World War II[1]
Production history
DesignerSkoda
Designed1901–05
ManufacturerSkoda
Produced1907-1918?
VariantsM 5/08
M 5/8 MP[1]
Specifications
Mass1,065 kg (2,348 lb)
Barrel length2.285 m (7 ft 6 in) L/30[1]
ShellFixed QF 76.5 x 283mm R[2]
Shell weight6.68 kg (14 lb 12 oz)
Caliber76.5 mm (3 in)
Breechhorizontal sliding-block
Recoilhydro-spring
CarriageBox trail
ElevationM 5/8: -7° 30' to +18°
M 5/8 MP: -5° to +73°
TraverseM 5/8: 7° 52'
M 5/8 MP: 360°[1][3]
Rate of fire8-10 rpm
Muzzle velocity433 m/s (1,420 ft/s)
Effective firing rangeM 05/08: 6.1 km (3.8 mi)
M 5/8 MP: 3.9 km (13,000 ft) AA ceiling
Maximum firing range7 km (4.3 mi)[1]

Users

In addition to being used by Austria-Hungary during World War I the M.5/8 was widely used by its successor states after the war. Guns captured by Italy were used in both World War I and World War II as the Cannone da 77/28 modello 5/8 and Cannone da 77/28 CA (contraereo). Weapons captured by Nazi Germany were used under the designations 7.65 cm FK 5/8(ö), 7.65 cm FK 5/8(t), 7.65 cm FK 5/8(j) or 7.65 cm FK 300(j), 7.65 cm FK(i) and 7.65 cm Flak 268/1(i).[1]

Variants

The M.5 was adapted for use in narrow mountain paths as the M.5/8 and could be disassembled into 3 loads. The base of the barrel was given lifting grips to speed its removal from the carriage and the carriage itself was modified to allow it to be disassembled. It is also worth noting that later M.5/8 barrels were made out of steel and full length axles of cast steel were available for use in its field gun configuration as found on an example rescued from a Dutch barn. This gun was also fitted with German army standard wooden wheels the differ from Austrian military standard through the lack of metal lugs on the spoke ends.

In addition to its field gun and mountain gun roles the M.5/8 was also adapted to an anti-aircraft role by placing the gun on a high-angle pedestal mount with 360 ° traverse and called the 8 cm Luftfahrzeugabwehr-Kanone M 5/8 MP.[5] The Italians also had an anti-aircraft version of the M 05/08 called the Cannone da 77/28 CA (contraereo). Despite its obsolescence it was deployed by Italian home guard units during World War II for static anti-aircraft defense and those captured by Germany after the Italian armistice in 1943 were given the designation 7.65 cm Flak 268/1(i).[3] There were also anti-aircraft versions of the M.5/8 in use with Czechoslovakia and Yugoslavia.

Notes
  1. Chamberlain, Peter (1975). Light and medium field artillery. Gander, Terry. New York: Arco. p. 4. ISBN 0668038209. OCLC 2067331.
  2. "77-77 MM CALIBRE CARTRIDGES". www.quarryhs.co.uk. Retrieved 2017-09-02.
  3. Chamberlain, Peter (1975). Anti-aircraft guns. Gander, Terry. New York: Arco Pub. Co. p. 31. ISBN 0668038187. OCLC 2000222.
  4. Ortner, p. 201-202
  5. "8cm Anti-Aircraft M5". www.landships.info. September 9, 2017.

References
  • Englemann, Joachim and Scheibert, Horst. Deutsche Artillerie 1934-1945: Eine Dokumentation in Text, Skizzen und Bildern: Ausrüstung, Gliderung, Ausbildung, Führung, Einsatz. Limburg/Lahn, Germany: C. A. Starke, 1974
  • 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
  • Ortner, M. Christian. The Austro-Hungarian Artillery From 1867 to 1918: Technology, Organization, and Tactics. Vienna, Verlag Militaria, 2007 ISBN 978-3-902526-13-7
  • Chamberlain, Peter and Gander, Terry. Light and Medium Field Artillery. New York, Arco
  • Chamberlain, Peter and Gander, Terry. Anti-Aircraft Guns. New York, Arco
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