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22.5 cm Minenwerfer M 15
22,5 cm Minenwerfer M.17.JPG
M 17 model used by Yugoslav Royal Army, displayed at Belgrade Military Museum
Type Heavy trench mortar
Place of origin Austria-Hungary
Service history
In service 1915-1918
Used by Austria-Hungary
Ottoman Empire
Wars World War I
Production history
Designer Böhler
Designed 1914-15
Manufacturer Böhler
Produced 1915-18
Number built 930+
Variants M 16 and M 17
Weight 565 kg (1,246 lb)
Length 1.35 m (4 ft 5 in) L/6

Shell 48 kg (106 lb)
Caliber 225 mm (8.9 in)
Elevation +25° to +75°
Rate of fire 2 rpm
Muzzle velocity 170 m/s (560 ft/s)
Maximum range 675 m (738 yd)

The 22.5 cm Minenwerfer M 15 was a heavy mortar used by Austria-Hungary in World War I. It was developed by Böhler as an alternative to the German Ehrhardt 25 cm schwere Minenwerfer which Böhler was having problems building under license. It was a muzzle-loading, smooth-bore mortar that had no recoil system whatsoever. The entire mortar had to be levered around to aim at new targets. It was not particularly accurate and bombs often fell over in flight and landed on their sides which caused a lot of duds in soft ground. It fired high-explosive and gas shells. For transport two wheels from the Gebirgsgechütz M 99 were used.

The M 17 version of this weapon had an elevation screw with a double thread and reinforced trunnion bearings. It's unclear how the M 16 differed from the earlier model.


  • 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

External links

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