135 mm/45 O.T.O. Mod. 1937 (135 mm)

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Stern port battery of 135 mm/45 O.T.O. Mod. 1937 on RN Etna

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

Tell us about the tactical and technical characteristics of the cannon or machine gun.

Ship Front Sides Top Elevator
Tickness (mm) type (mm) type (mm) type (mm) type
RN Conte di Cavour
RN Duilio 		120 RCA 80 RCA 60 RHA 100 RCA
RN Etna
RN Attilio Regolo 		20 RHA 6 RHA 6 RHA 0 —
RN Comandante Margottini 12 AfA 12 AfA 12 AfA 0 —

Available ammunition

135 mm APHEBC Perforante shells pictured in-flight, with the aft battery of RN Etna firing in the background. Note the white tracer characteristic for armour-piercing shells.

The choice of shells is typical for the Italian pre-WW2 guns, limited to HE and AP against surface targets and HE-TF against aircraft. It's adequate for nearly every situation a warship can encounter.

  • 135 mm HE Dirompente - Universal high-explosive round, great against frigates and torpedo boats alike, to a degree also useful against enemy destroyers, or to ignite heavier warships on fire.
  • 135 mm APHEBC Perforante - The shell of choice against enemy cruisers, or to reach the ammo racks on destroyers. It lacks penetration to deal with some of the heavy cruisers or all of the battleships/battlecruisers, so against them the HE rounds would be a better choice.
  • 135 mm HE-TF Contro-aerea - Time-fused high explosive shell, able to counter enemy aircraft through shrapnel. Use Distance fuse set accuracy crew skill to increase the probability of fusing in the perfect spot for the kill - however, even with the skill maxed-out, shells still can explode ± 100 m away from a target at 5000 meters range, which is more than enough for the aircraft to avoid taking any damage. Still - it's by far the best round to use against enemy airplanes.
Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
1,000 m 2,500 m 5,000 m 7,500 m 10,000 m 15,000 m
135 mm HE Dirompente HE 23 23 23 23 23 23
135 mm APHEBC Perforante APHEBC 171 139 100 73 56 45
135 mm HE-TF Contro-aerea HE-TF 23 23 23 23 23 23
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(s) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (kg) 		Ricochet
0% 50% 100%
135 mm HE Dirompente HE 825 32.42 0 0.1 1.8 79° 80° 81°
135 mm APHEBC Perforante APHEBC 825 32.73 0.01 6 1.47 48° 63° 71°
135 mm HE-TF Contro-aerea HE-TF 825 32.42 0 0.1 1.8 79° 80° 81°

Comparison with analogues

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Usage in battles

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Pros and cons

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Pros:

Cons:

History

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Media

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See also

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  • reference to the article about the variant of the cannon/machine gun;
  • references to approximate analogues by other nations and research trees.

External links

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  • other literature.


Italy naval cannons
20 mm  20 mm/65 Breda · 20 mm/70 Oerlikon 3S · 20 mm/70 Scotti-Isotta Fraschini mod.1939
37 mm  37 mm/54 Breda Mod.32 · 37 mm/54 Breda Mod.38 · 37 mm/54 Breda Mod.39
40 mm  40 mm/39 Vickers-Terni mod.1915/1917 · 40 mm/39 Vickers-Terni mod.1915/1917, Modif.1930 · 40 mm/70 Breda-Bofors type 107
65 mm  65 mm/64 Ansaldo-Terni Mod.1939
76 mm  76 mm/40 Armstrong mod.1897/1910 · 76 mm/40 Armstrong mod.1897/1912 · 76 mm/40 Ansaldo mod.1917 · 76 mm/45 Schneider mod.1911 · 76 mm/50 Vickers mod.1909 · 76 mm/62 OTO-Melara Compact · 76-mm/62 SMP 3
90 mm  90 mm/50 Ansaldo model 1939
100 mm  100 mm/47 O.T.O. Mod. 1928 · 100 mm/47 O.T.O. Mod. 1937
120 mm  120 mm/45 Canet-Schneider-Armstrong mod.1918-19 · 120 mm/50 Armstrong model 1909 · 120 mm/45 O.T.O. Mod. 1926 · 120 mm/50 Ansaldo mod.1926 · 120 mm/50 O.T.O. Mod.1936
135 mm  135 mm/45 O.T.O. Mod. 1937
152 mm  152 mm/45 Schneider mod.1911 · 152/53 mm Ansaldo mod.1926 · 152/53 mm O.T.O. Mod.1929
203 mm  203 mm/50 Ansaldo mod.1924 · 203 mm/53 Ansaldo mod.1927
305 mm  305 mm/46 Armstrong model 1909 · 305 mm/46 Vickers model 1909
320 mm  320 mm/44 OTO model 1934 · 320 mm/44 Ansaldo model 1936
  Foreign:
20 mm  2 cm/65 Flakvierling 38 (Germany) · 20 mm/70 Oerlikon Mk.II (USA)
40 mm  Bofors L/60 Mark 1 (USA) · Bofors L/60 Mark 3 (USA)
76 mm  76 mm/50 Mk.33 (USA)
127 mm  127 mm/38 Mk.12 (USA)

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