Sextuple 20mm AA guns of Regia Marina

GianmarcoBianchi

GianmarcoBianchi

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What‘s that weapon?
BredaQuad20mm-65.jpg
 
Fully stabilized Breda 20-mm/70 Model 1941 sextuple mount, fully stabilized. Extremely advanced system for its time, that remedied most of the flaws of earlier 20-mm/65 Model 1935 dual mount (also fully stabilized), but was very maintenance-heavy, and appeared too late. Only a few were installed before the armistice in 1943.
 
Dilandu said:
Fully stabilized Breda 20-mm/70 Model 1941 sextuple mount, fully stabilized. Extremely advanced system for its time, that remedied most of the flaws of earlier 20-mm/65 Model 1935 dual mount (also fully stabilized), but was very maintenance-heavy, and appeared too late. Only a few were installed before the armistice in 1943.
Click to expand...
thanks. and what are these? Scotti version guns? What relationship did Breda and Scotti have, on these AA projects?
1774073130390.png 1774073112114.png
 
The second image depicts a series of mounts for the Mitragliera Breda mod. 41. This is the text describing this weapon taken from the wonderful dual-language book "Alle origini delia Breda Meccanica Bresciana", Andrea Curami, Paolo Ferrari e Achille Rastelli, Negri Edizioni, 2009.

In the November 1941 production document already mentioned we find among the newer weapons a "20 mm calibre machine gun of the Aviation type, — already built," whose technical features include: "Firing rate, 600 rounds a minute, as against 220 rounds a minute for the field gun version. Weight, 42 kg, as against 69 kg for the field gun. Recoil force against the buffer reduced to 900 kg, as against the 3000 kg of the field gun." This weapon was not widely adopted in the aeronautical field because of the contemporary popularity of the German Rheinmetall machine gun, already in long term use with the Luftwaffe. The naval applications also make for an interesting study. To cite again the Breda document, "For the Italian Navy. A six-barrel machine gun mounting, calibre 20 mm, of the Aviation type, currently under trial. Technical characteristics: Great fire power of 3600 rounds a minute, with the possibility firing only 2 or 4 barrels at a time." It would seem that the trial mentioned was an imitation of that carried out for the German multiple barrel Flakvierling 38 model, which had been fitted on four destroyers of the "Cyclone" class in place of the third 100/40 guns. It was intended to fit the Italian multi-barrel gun on the Aquila aircraft-carrier, whose armament was to have consisted of 12 units of the 65/64 gun and 22 units of this six barrels Breda 20/70, model 41. The Breda trial also concerned the twin and four barrels versions of the 20 mm gun, these last arranged in varying dispositions of the four barrels, intended for the MAS boats and for the field gun applications that the Army High Command wanted to introduce in 1944.

No info obout the first image from this book. You can find these images in this fantastic photographic archive:

https://www.lombardiabeniculturali.it/fotografie/schede/IMM-5w060-0005739/?view=ricerca&offset=226

https://www.lombardiabeniculturali.it/fotografie/schede/IMM-5w060-0005744/?view=ricerca&offset=195

EDIT: the image of the sextuple mount from that archive.

1774084082483.png

https://www.lombardiabeniculturali.it/fotografie/schede/IMM-5w060-0005743/?view=ricerca&offset=205
 
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