45 mm/89 SM-20-ZIF (45 mm)
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Vehicles equipped with this weapon
The 45 mm/89 SM-20-ZIF weapon system is a unique multi-purpose system mounted on the Spokoinyy and Neustrashimy Cold War destroyers. It is essentially the up-calibred equivalent to the 40 mm Bofors autocannon seen in the vast majority of American vessels and modern German vessels and the 2pdr QF autocannons mounted on British vessels. The enhanced platform it is mounted on gives a substantial upgrade to targeting speeds. They are unique 45 mm multi-purpose systems that excel at AA duties and destruction of light armour.
The SM-20-ZIF has access to a single set of ammunition: HEF and HEF-T*. While HEF only, these rounds prove a significant challenge for lightly armoured targets. The fast rate of fire (~120 RPM per cannon, ~480 RPM per turret) poses a significant threat for anyone in range. It not only can cripple external modules like funnels, turrets, bridge and the like but it will reduce the crew count at an impressively fast rate at close ranges. It does not have access to AP-T or HE-VT like its 40 mm counterparts.
Comparison with analogues
Compared to 40 mm/70 MEL58
Despite the fact the SM-20-ZIF has a higher calibre, the uses and performance per gun are not significantly different. Both share a fairly similar ROF (~120 RPM vs ~300 RPM) in proportion to calibre. However, when both are set on their respective mounts, a clear difference in performance emerges, especially when comparing their respective platforms. The SM-20-ZIF are mounted in a quad-cannon turret with 4 turrets per ship while the MEL58 are mounted in a double-cannon turret with 2 turrets per ship. This results in a cumulative fire rate of 1,920 RPM for SM-20-ZIF while the MEL58 can fire 1,200 RPM. The SM-20-ZIF nearly doubles the amount of RPM. While it is harder to aim and to perform against aircraft due to the lack of HE-VT*, the amount of rounds the SM-20-ZIF can put in the air makes the chances of hitting the target more likely than using HE-VT*, as well as being cover a far wider area instead of a focused spot in the air.
Compared to 2pdr QF Mk.VIII
It is pretty much straight forward that the SM-20-ZIF has overall better performance as a Cold War weapon system compared to a WW2 weapon system. While this is true, the fact it the 2pdr can carry and use AP ammunition compared to the HEF restricted belt makes a significant change in uses as the 2pdr is able to pierce thicker armour at the cost of explosive filler.
Compared to Bofors L/60 Mark 2
While all the Bofors generally stay the same (with exception of the MEL58 that has an increased fire rate), the Mark 2 is the closest counterpart to the SM-20-ZIF as this is a quad mount. Performance-wise, nothing that hasn't been discussed before in terms of ammunition, targeting and ROF. While close to what the SM-20-ZIF is able to achieve (~150 RPM per gun, ~2400 RPM mounted in 4 turrets), the higher calibre makes a tough competitor against the Mark 2 series only as it is a quad mount.
Usage in battles
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Pros and cons
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|USSR naval cannons|
|30 mm||AK-230 · 30 mm/54 AK-630 · BP "Plamya"|
|37 mm||37 mm/67 70-K · V-11|
|45 mm||45 mm/46 21-K · 45 mm/68 21-KM · 45 mm/89 SM-20-ZIF|
|75 mm||75 mm/50 Canet patt.1892|
|76 mm||34-K · 39-K · 76 mm/60 AK-176M · AK-726 · D-56TS · F-34 · Lender AA gun, pattern 1914/15|
|85 mm||85 mm/52 92-K · 85 mm/54.6 ZIS-C-53 · 90-K|
|100 mm||100 mm/56 B-34 · 100 mm/70 SM-5-1 · Minizini|
|102 mm||Pattern 1911|
|120 mm||120 mm/50 pattern 1905|
|130 mm||130 mm/50 pattern 1913 · 130 mm/58 SM-2-1 · B-13|
|152 mm||152 mm/57 B-38|
|180 mm||180 mm/57 B-1-P · 180 mm/60 B-1-K|
|305 mm||12-inch/52 pattern 1907|
|40 mm||2pdr QF Mk.IIc (Britain)|
|47 mm||3 pdr QF Hotchkiss (Britain)|