17 cm Kanone 18

June 2018 17 cm Kanone 18 in Mörserlafette Ciężka armata niemiecka - K 18 kal. 170 mm Morserlafette na froncie pod Nettuno - Anzio (2-2187).jpg 300 17 cm Kanone 18 in action during the Battle of Anzio Heavy gun Germany Yes Yes 1941–1945 Germany World War II Krupp Krupp (1941-1942), Hanomag (1943-1945) 1941–1945 338 For transport 23.375 t LTIn action 17.520 t LT Bore 8.625 m ftin L/50 10 Separate-loading HE 62.8 kg lb 172.5 mm inMunition der 17 cm Geschosse http://michaelhiske.de/Wehrmacht/Heer/D_HEER/D0460/0460_02a/Blatt_K/285.htm 2024-06-16 www.michaelhiske.de de 925 m/s ft/s 29.6 km mi Horizontal-block Dual-recoil hydro-pneumatic Box trail 0 to +50° 16° on wheels 360° on platform Bishop, Hogg, Ludeke & Zabecki. The 17 cm Kanone 18 in Mörserlafette (en 17 cm Cannon 18 on Mortar Carriage yes), abbreviated as 17 cm K 18 in MrsLaf, was a German heavy gun used during World War II. Design The 17 cm K 18 in MrsLaf was a 172.5 mm in towed gun with a barrel 50 calibres long. The 17 cm K 18 in MrsLaf shared the same box trail carriage with the 21 cm Mörser 18. The carriage allowed transport of the weapon over short distances in one piece, whilst for longer distances the barrel was removed from the carriage and transported separately. A series of ramps and winches made removing the barrel a reasonably quick task for its time, but still required several hours. For all of the gun's bulk, a full 360-degree traverse could be achieved by two men. Dual-recoil mechanism A notable innovation by Krupp on the 21 cm Mörser 18 and the 17 cm Kanone 18 was the "double recoil" or dual-recoil carriage. The normal recoil forces were initially taken up by a conventional recoil mechanism close to the barrel, and then by a carriage sliding along rails set inside the travelling carriage. The dual-recoil mechanism absorbed all of the recoil energy with virtually no movement of the box trail upon firing, thus making for a very accurate weapon. Ammunition Projectiles The 17 cm K 18 in MrsLaf fired three types of separately loaded ammunition. Projectile Fuse Weight Max range Comments 17cm K Gr 39 AZ 35K or Dopp Z S/90K 68 kg lb 28 km mi The standard HE shell with an explosive charge of 7.33 kg. 17cm K Gr 38 Hb Hbgr Z 35K or Dopp Z S/90K 62.8 kg lb 29.6 km mi Long-range shell fitted with a ballistic cap. 17cm Pzgr 43 Bd Z f 17cm Pzgr 71 kg lb UNK Armour-piercing shell with a velocity of 830 m/s ft/s and could penetrate 255 mm in of armour at 30° at 1000 m yd. It had an explosive charge of 2.34 kg. Shell performance The 17 cm K 18 in MrsLaf separately loaded ammunition used four charges. The gun's performance when firing the 62.8 kg lb on on 17cm K Gr 38 Hb long-range shell is depicted in the following table: Charge Muzzle velocity Range Charge 1 620 m/s ft/s 18.3 km mi Charge 2 740 m/s ft/s 22.7 km mi Charge 3 860 m/s ft/s 28 km mi Charge 4 925 m/s ft/s 29.6 km mi History In 1939, the 21 cm Mörser 18 began appearing in the Wehrmacht corps-level artillery regiments, replacing the obsolescent World War I-era 21 cm Mörser 16. The gun was able to send a 113 kg lb HE shell out to a range of 14.5 km mi 0; however, by 1941, the Wehrmacht was seeking a longer-ranged weapon and Krupp responded by producing a smaller 172.5 mm in 2 on on calibre increased-velocity weapon utilising the same carriage, with the designation Kanone 18. The 17 cm K 18 in MrsLaf quickly impressed German artillery officers with its range, but the real surprise was the explosive power of the 62.8 kg lb on on shell, which was little different from the 113 kg lb on on shell of the 21 cm Mörser 18. Production commenced in 1941. In 1942, production of the 21 cm Mörser 18 was halted for almost two years so as to allow maximum production of the Kanone 18. It has been suggested that the gun is the basis for the North Korean M-1978 Koksan but there is no particular evidence for this beyond the calibre.Mitzer Stijn Oliemans Joost The Armed Forces of North Korea: On the Path of Songun Helion & Company 2020 978-1-910777-14-5 61 Operational history The 17 cm K 18 in MrsLaf was employed at the corps and army echelons in order to provide long-range counter-battery support, as well as filling the same basic heavy support role as the 21 cm Mörser 18, the pair becoming the most common weapons used by the Wehrmacht in this role. In 1944, some Allied batteries used captured 17 cm K 18 in MrsLafs when ammunition supplies for their usual guns were disrupted by the long logistical chain from Normandy to the German border. The 17 cm K 18 in MrsLaf was considered a technically excellent long range artillery piece for the German Army, with excellent range and a very effective shell. The gun's greatest weaknesses were that it was expensive to build and required careful maintenance. Additionally, it was quite slow to bring in and out of action, fairly difficult to maneuver and very slow to move off-road. Many were lost when their crews abandoned them when fleeing advancing Allied forces. Gallery See also 17 cm Kanone in Eisenbahnlafette – railway gun of same calibre M107 self-propelled gun – post-war US gun of similar calibre References Chris Bishop (ed), The encyclopedia of small arms and artillery, Koo nr Rochester: Grange Books, 2006, 978-1-84013-910-5. Ian V. Hogg, German artillery of World War Two, London: Frontline Books, 2013, 978-1-84832-725-2. Alexander Ludeke, German heavy artillery guns: 1933–1945, Barnsley: Pen & Sword Military, 2014, 978-1473823990. David T. Zabecki, "Artillery (1618–present)", Germany at war: 400 years of military history, David T. Zabecki (ed), Santa Barbara: ABC-CLIO LLC, 2014, 978-1-59884-980-6. External links Military Factory, "17cm Kanone 18 (17cm K18)", militaryfactory.com, retrieved 29 June 2018. Category:World War II artillery of Germany Category:173 mm artillery Category:Weapons and ammunition introduced in 1941