130 mm/58 SM-2-1 (130 mm)
Contents
Description
Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.
Vehicles equipped with this weapon
General info
The SM-2-1 130 mm weapon system is the Russian "equivalent" to the 5 inch/38 Mk.12 (127 mm) weapon system in terms of reliabilty, caliber and use. This weapon system is completely new to the WW2 Soviet 130 mm cannons as it features an auto-loader, enhanced targetting and radar capabilities. As already seen in Russian 130 mm cannons, they are multi-purpose weapon systems with devastating AA capabilities. However, compared to the Mk.12, it has a significantly reduced ROF (15 RPM vs 22 RPM) but it counters that with much faster targetting speeds and better cannon elevation angles.
Available ammunition
The SM-2-1 has access to three types of ammunition: OF-42 HE, PB-42 SAP and ZS-42R HE-VT. The OF-42 offers a very potent destructive effect against lightly armored targets and a superior HE filler than the ZS-42R HE-VT. However, as most HE shells, it barely has penetration to counter armor (just 37 mm of penetration at all ranges and angles). The PB-42 SAP offers a midpoint between APCBC and HE shells as it has a decent explosive filler with sufficient armor penetration (203 mm and reduces with range and angle). This round should be the main round utilized when fighting all type of ships due to the armor penetration. Lastly, we have the ZS-42R HE-VT, it offers a superb explosive filler for AA purposes but is almost half of the explosive filler of the OF-42 HE. Since it has a proximity fuze, engaging aircraft is much more easier.
| Penetration statistics | |||||||
|---|---|---|---|---|---|---|---|
| Ammunition | Type of
warhead |
Penetration @ 0° Angle of Attack (mm) | |||||
| 100 m | 1,000 m | 2,000 m | 3,000 m | 4,000 m | 5,000 m | ||
| 130 mm OF-42 HE | HE* | 37 | 37 | 37 | 37 | 37 | 37 |
| 130 mm ZS-42R HE-VT | HE-VT | 35 | 35 | 35 | 35 | 35 | 35 |
| 130 mm PB-42 SAP | SAPBC | - | 203 | 176 | - | - | 146 |
| Shell details | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of
warhead |
Velocity
(m/s) |
Projectile
Mass (kg) |
Fuse delay
(m) |
Fuse sensitivity
(mm) |
Explosive Mass
(TNT equivalent) (g) |
Ricochet | ||
| 0% | 50% | 100% | |||||||
| 130 mm OF-42 HE | HE* | 950 | 33.4 | 0 | 0.1 | 3830 | 79° | 80° | 81° |
| 130 mm ZS-42R HE-VT | HE-VT | 955 | 33.08 | 0 | 0.1 | 2210 | 79° | 80° | 81° |
| 130 mm PB-42 SAP | SAPBC | 950 | 33.4 | 4 | 5 | 3000 | 48° | 63° | 71° |
Comparison with analogues
The SM-2-1 has a better handling in general than B-13's, to be expected from a much modern weapon system.
Compared to 5 inch/38 Mk.12 (127 mm)
As previously discussed, both systems, while very similar, have many differences, primarily the targetting speed and ROF. The SM-2-1 is able to hold a firing for longer with much better performing ammunition. While the 5 inch AAVT Mk.31 has a slightly better explosive filler than the ZS-42R (3.22 kg vs 3 kg) it has a huge speed reduction (792 m/s vs 955 m/s) making it much harder to aim and hit aircraft. The benefit of the SM-2-1 over the Mk.12 while doing AA duties is the elevation angle (-10°/+35° vs -15°/+82°)
Compared to 4.5 inch/45 QF Mark V (114 mm)
The 4.5 inch Mark V is the closest system to the SM-2-1. While it has a faster ROF (20 RPM vs 15 RPM) it has slightly reduced targetting speed (17°/s vs 18°/s). In terms of ammunition they are pretty much the same when it comes to type of ammunition, but the SM-2-1 has overall better performing ammunition due to the increased caliber.
Compared to 4.7 inch/45 Mk.XII (120 mm)
As expected from a Cold War weapon system fighting to a WW2 one, the SM-2-1 has a superb performance over it in all aspects. Different from the other systems, the SM-2-1 now has a better ROF (15 RPM vs 12 RPM)
Usage in battles
Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.
Pros and cons
Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.
Pros:
Cons:
History
Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: https://wiki.warthunder.com/(Weapon-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />.
Media
An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.
See also
Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:
- reference to the article about the variant of the cannon/machine gun;
- references to approximate analogues by other nations and research trees.
External links
Paste links to sources and external resources, such as:
- topic on the official game forum;
- encyclopedia page on the weapon;
- other literature.
