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walter leotta

Mimoyecques Il Sito Del V-3

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Nella regione del Pais du Calais si trova il sito di Mimoyecques, una galleria scavata dentro la montagna per ospitare il supercannone V-3 capace di colpire Londra da una distanza di 165 km. Il sito fu inutilmente bombardato dai velivoli alleati, compresi "i distruttori di dighe" del famoso No.617 Squadron della RAF. In un'altra incursione perse la vita Joseph Kennedy, fratello del futuro presidente degli Stati Uniti.


Il sito è ora museo militare. Quando l'ho visitatonegli anni '90 era appena stato aperto e non c'era praticamente nulla al di là del tour delle gallerie. Peraltro non avendo attrezzature fotografiche particolari, feci pochissime foto. E' prevedibile pensare che da allora il museo si sia "allargato".










Vergeltungswaffe 3), also known as the Hochdruckpumpe ("High Pressure Pump", HDP for short) and Fleissiges Lieschen ("Busy Lizzie"),[4] was a German World War II supergun working on the multi-charge principle whereby secondary charges are detonated to add velocity to a projectile.


The weapon was planned to be used to bombard London from two large bunkers in the Pas-de-Calais region of northern France, which were rendered unusable by Allied bombing raids before completion. Two similar guns were used to bombard the city of Luxemburg from December 1944 to February 1945.


In 1880, the Lyman-Haskell multi-charge gun was unsuccessfully test fired at the Philadelphia Frankfort Arsenal when the original propellant charge bypassed the projectile and prematurely ignited the subsidiary charges.[5] Lyman and Haskell abandoned the idea, which was raised again in Britain during World War I.[6]


In 1943, German engineer August Cönders, of Röchling Stahlwerk AG, proposed an electrically-detonated multi-charge weapon.[citation needed] Thanks to the success of one of Cönders' other projects, the "Röchling Shell", major figures in the Nazi establishment took notice of him, most importantly Albert Speer, the Minister of Munitions.[6]


Cönders was ordered[citation needed] to produce a prototype of the Hochdruckpumpe ("high-pressure-pump")[1] and duly constructed one in 20 mm calibre which proved satisfactory.[citation needed] At this point Adolf Hitler, who had been following[citation needed] the project with interest, took a hand. He decided[citation needed] that a battery of 50 full size guns[citation needed] would be sited in northern France and used to bombard London.


Cönders had constructed a full-calibre gun at the Hillersleben proving ground near Magdeburg but by the end of 1943 had encountered severe problems[citation needed] both in putting the gun's basic principle into operation and in producing a feasible design for the shells it was to fire. Even when everything worked, the muzzle velocity was just over 1,000 metres per second (3,300 ft/s)[citation needed] which was nowhere near what had been promised. Nonetheless plans were progressed to build a single full-size gun with a 150 metres (490 ft) barrel at Misdroy on the Baltic island of Wolin, near Peenemünde, while construction at the Mimoyecques site in France (which had already been attacked by the USAAF and the RAF) went ahead. By March 1944, with no good news coming out of Misdroy, the Heereswaffenamt (Weapon Procurement Office) took control of the project[citation needed] and Cönders became one of the engineers working on the three chief problems: projectile design, obturation, and ignition of the secondary charges.[citation needed]


Six different companies including Krupp and Skoda produced satisfactory designs for projectiles. Obturation problems were solved by placing a sealing piston behind the projectile and the initial propellant charge, which in turn prevented the flash from the charge from getting ahead of the projectile and solved the problem of controlling the detonation of the secondary charges.[6] By the end of May 1944 there were four designs for the 150 mm finned projectile, one manufactured by Fasterstoff (designed by Füstenberg), and three others by Röchling (Cönders), Bochumer (Verein-Haack), and Witkowitz (Athem).[7]


Trials were held at Misdroy from May 20-24 1944 with ranges of up to 55 miles (89 km) being attained.[7]p218 On July 4, 1944 the Misdroy gun was test fired with 8 rounds (one of the 6-foot-long shells travelled 93 kilometres (58 mi)) before it burst,[7]p245 effectively putting an end to the project.[citation neede

Edited by walter leotta

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