Difference between revisions of "GT-3 (105 mm)"

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{{About
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[[File:Weapon GT-3 (105 mm).png|thumb|right|x250px|The GT-3 (105 mm) on the Class 3 (P) gun mantlet.]]
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| about = South-African '''{{PAGENAME}}''' cannon
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| usage = variants
 
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| link = L7 (105 mm) (Family)
 
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== Description ==
 
== Description ==
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''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.''
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<!-- ''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.'' -->
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The '''105 mm GT-3''' cannon is a 105 mm South African tank cannon developed by Denel in their efforts to upgrade existing Centurions with a more powerful cannon. Due to international embargoes imposed on South Africa, the South African government had to purchase their parts elsewhere. This cannon uses a modified 105 mm barrel while retaining the original [[20pdr OQF Mk.I (84 mm)]] gun breech from their Centurions. The resulting gun could fire NATO ammunition.
  
 
=== Vehicles equipped with this weapon ===
 
=== Vehicles equipped with this weapon ===
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== General info ==
 
== General info ==
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''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
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<!-- ''Tell us about the tactical and technical characteristics of the cannon or machine gun.'' -->
  
 
=== Available ammunition ===
 
=== Available ammunition ===
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''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).''
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<!-- ''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).'' -->
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The M152, M156 and M111 shells are available to all tanks using the 105 mm GT-3 cannon. The M416 smoke round is available only for the [[Olifant Mk.1A]], the DM33 is present only in the [[Class 3 (P)]], while the DM63 is used only in the [[TTD]]. The GT-3 has no access to stock APDS rounds, which means that players must rely on the HEATFS shots.
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{{:{{PAGENAME}}/Ammunition|M152 / DM12, M416, M156, DM512, M111 / DM23, DM33, DM63}}
  
 
=== Comparison with analogues ===
 
=== Comparison with analogues ===
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''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.''
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<!-- ''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.'' -->
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* [[L7A3 (105 mm)]] - A very similar performance, found on most Leopards and the Japanese Type 74s.
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* [[L7A1 (105 mm)]] - An inferior GT-3.
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* [[FMK.4 Modelo 1L (105 mm)]] - Practically the same gun. Both have the same reload speed and the same shells. The only difference is the access to an APDS round.
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* [[D-10T (100 mm)]] / [[D-10T2S (100 mm)]] - With an extra 3 seconds of reload time across the board, it gives the GT-3 quite a practical advantage.
  
 
== Usage in battles ==
 
== Usage in battles ==
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'''Pros:'''
 
'''Pros:'''
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*
 
*
  
 
'''Cons:'''
 
'''Cons:'''
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*
 
*
  
 
== History ==
 
== History ==
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''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: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.''
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<!-- ''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: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.'' -->
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The GT-3 was a South African cannon developed by Denel Land System in their effort to upgrade existing Centurion tanks with a 105 mm cannon. Due to international sanctions forbidding South Africa from acquiring new weapons, their ageing tank force and experience in the Border War against Angola, the South Africans resorted to making their own weapons with whatever was available to them, including their Centurion Mk3s and their 84 mm cannon. It was decided to use the Centurion as a basis for a new indigenous South African tank (as they had no other options available).
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The resulting product was a 105 mm cannon. This cannon, known as the 105 mm GT-3, retains the 84 mm cannon's breech assembly, while fitting it with new mounting lugs to fit existing recoil system. The barrel is a similar copy to the original British L7A3's own barrel, with a couple of minute changes to fit in with the different breech assembly. The resulting cannon could fire NATO ammunition.
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 +
The GT-3, with the Israeli supplied M111 APFSDS round could penetrate a T-54/55 and T-62 up to a range of 2 km. However, most Olifant Mk.1A crews preferred HEAT-FS rounds due to it making a much more noticeable impact, considering that the Olifant Mk.1A faces Angolan T-54/55 and T-62s that does not have any form of composite or reactive armour.
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On November 1987, as part of Operation Moduler, Lt. Hein Fourie destroyed the first T-55 with an Olifant Mk.1A armed with the GT-3 cannon. Overall, the GT-3 cannon was successful in its role in modernising the South African army with a tank cannon that is capable of dominating the African battlefield without outside assistance.
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Apart from the Olifant, the GT-3 would also be installed in the Tank Technology Demonstrator (TTD) as a placeholder while a 120 mm was being developed, which unfortunately was scrapped.
  
 
== Media ==
 
== Media ==
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''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
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<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' -->
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;Images
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<gallery mode="packed-hover" heights="200">
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File:Weapon GT-3 (105 mm) Olifant Mk.1A.png|<small>The 105 mm GT-3 on the [[Olifant Mk.1A]] gun mantlet.</small>
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</gallery>
  
 
== See also ==
 
== See also ==
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''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
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<!-- ''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;''
 
* ''reference to the article about the variant of the cannon/machine gun;''
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* ''references to approximate analogues by other nations and research trees.''
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* ''references to approximate analogues by other nations and research trees.'' -->
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* [[L7 (105 mm) (Family)]]
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* [[GT-7 (105 mm)]]
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* [[GT-8 (105 mm)]]
  
 
== External links ==
 
== External links ==
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''Paste links to sources and external resources, such as:''
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<!-- ''Paste links to sources and external resources, such as:''
 
* ''topic on the official game forum;''
 
* ''topic on the official game forum;''
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* ''encyclopedia page on the weapon;''
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* ''other literature.'' -->
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* ''other literature.''
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* [http://www.army-guide.com/eng/product3619.html <nowiki>[Army Guide]</nowiki> GT-3]
  
 
{{Germany tank cannons}}
 
{{Germany tank cannons}}

Latest revision as of 01:10, 24 June 2023

The GT-3 (105 mm) on the Class 3 (P) gun mantlet.

Description

The 105 mm GT-3 cannon is a 105 mm South African tank cannon developed by Denel in their efforts to upgrade existing Centurions with a more powerful cannon. Due to international embargoes imposed on South Africa, the South African government had to purchase their parts elsewhere. This cannon uses a modified 105 mm barrel while retaining the original 20pdr OQF Mk.I (84 mm) gun breech from their Centurions. The resulting gun could fire NATO ammunition.

Vehicles equipped with this weapon

General info

Available ammunition

The M152, M156 and M111 shells are available to all tanks using the 105 mm GT-3 cannon. The M416 smoke round is available only for the Olifant Mk.1A, the DM33 is present only in the Class 3 (P), while the DM63 is used only in the TTD. The GT-3 has no access to stock APDS rounds, which means that players must rely on the HEATFS shots.

Penetration statistics
Ammunition Type of
warhead 		Penetration @ 0° Angle of Attack (mm)
10 m 100 m 500 m 1,000 m 1,500 m 2,000 m
M152 / DM12 HEATFS 400 400 400 400 400 400
M156 HESH 127 127 127 127 127 127
DM512 HESH 127 127 127 127 127 127
M111 / DM23 APFSDS 337 335 330 322 314 306
DM33 APFSDS 408 405 398 389 379 370
DM63 APFSDS 430 427 420 409 400 390
Shell details
Ammunition Type of
warhead 		Velocity
(m/s) 		Projectile
mass (kg) 		Fuse delay
(m) 		Fuse sensitivity
(mm) 		Explosive mass
(TNT equivalent) (kg) 		Ricochet
0% 50% 100%
M152 / DM12 HEATFS 1,174 10.5 0.05 0.1 1.27 65° 72° 77°
M156 HESH 731 11.4 0.1 4 3.17 73° 77° 80°
DM512 HESH 732 11.2 0.1 4 4.31 73° 77° 80°
M111 / DM23 APFSDS 1,455 4.2 - - - 78° 80° 81°
DM33 APFSDS 1,455 3.79 - - - 78° 80° 81°
DM63 APFSDS 1,455 4.4 - - - 78° 80° 81°
Smoke shell characteristics
Ammunition Velocity
(m/s) 		Projectile
mass (kg) 		Screen radius
(m) 		Screen deploy
time (s) 		Screen hold
time (s) 		Explosive mass
(TNT equivalent) (g)
M416 732 11.6 20 5 25 50

Comparison with analogues

  • L7A3 (105 mm) - A very similar performance, found on most Leopards and the Japanese Type 74s.
  • L7A1 (105 mm) - An inferior GT-3.
  • FMK.4 Modelo 1L (105 mm) - Practically the same gun. Both have the same reload speed and the same shells. The only difference is the access to an APDS round.
  • D-10T (100 mm) / D-10T2S (100 mm) - With an extra 3 seconds of reload time across the board, it gives the GT-3 quite a practical advantage.

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

The GT-3 was a South African cannon developed by Denel Land System in their effort to upgrade existing Centurion tanks with a 105 mm cannon. Due to international sanctions forbidding South Africa from acquiring new weapons, their ageing tank force and experience in the Border War against Angola, the South Africans resorted to making their own weapons with whatever was available to them, including their Centurion Mk3s and their 84 mm cannon. It was decided to use the Centurion as a basis for a new indigenous South African tank (as they had no other options available).

The resulting product was a 105 mm cannon. This cannon, known as the 105 mm GT-3, retains the 84 mm cannon's breech assembly, while fitting it with new mounting lugs to fit existing recoil system. The barrel is a similar copy to the original British L7A3's own barrel, with a couple of minute changes to fit in with the different breech assembly. The resulting cannon could fire NATO ammunition.

The GT-3, with the Israeli supplied M111 APFSDS round could penetrate a T-54/55 and T-62 up to a range of 2 km. However, most Olifant Mk.1A crews preferred HEAT-FS rounds due to it making a much more noticeable impact, considering that the Olifant Mk.1A faces Angolan T-54/55 and T-62s that does not have any form of composite or reactive armour.

On November 1987, as part of Operation Moduler, Lt. Hein Fourie destroyed the first T-55 with an Olifant Mk.1A armed with the GT-3 cannon. Overall, the GT-3 cannon was successful in its role in modernising the South African army with a tank cannon that is capable of dominating the African battlefield without outside assistance.

Apart from the Olifant, the GT-3 would also be installed in the Tank Technology Demonstrator (TTD) as a placeholder while a 120 mm was being developed, which unfortunately was scrapped.

Media

Images

See also

External links


Germany tank cannons
20 mm  KwK30 · KwK38 · Rh202
28/20 mm  s.Pz.B.41
30 mm  MK 30-2/ABM
37 mm  KwK34(t) · KwK36 · KwK38(t) · PaK L/45
47 mm  Pak.(t)(Sf.)
50 mm  KwK39 · KwK L/42 · PaK38
57 mm  Bofors L/70 Mk.1
75 mm  K51 L/24 · KwK37 · KwK40 L43 · KwK40 L48 · KwK42 · KwK44 · KwK44 L/36.5 · PaK39 L48 · PaK40/3 L46 · PaK42 · StuK37 · StuK40 L43 · StuK40 L48
76 mm  PaK36 (r)
88 mm  Flak.37 · Flak 41 · KwK36 · KwK43 · PaK43
90 mm  BK90
105 mm  CN105-57 · Cockerill HP · FMK.4 Modelo 1L · K.18 · KwK L/68 · L7A3 · PzK M57 · StuH42
120 mm  Rh120 L/44 · Rh120 L/55 · Rh120 L/55 A1
128 mm  K.40 · KwK44 · PaK44
150 mm  s.I.G.33 · Stu.H 43 L/12
380 mm  RW61
  Foreign:
30 mm  Bushmaster 2 Mk.44 (USA) · HSS 831L (Britain)
57 mm  6pdr OQF Mk.V (Britain)
73 mm  2A28 (USSR)
75 mm  M3 (USA)
76 mm  F-32 (USSR) · F-34 (USSR) · M32 (USA)
90 mm  M36 (USA) · M41 (USA)
105 mm  GT-3 (South Africa)
125 mm  2A46 (USSR)
152 mm  M-10T (USSR) · XM150E5 (USA)
155 mm  M126 (USA)

Britain tank cannons
30 mm  L21A1
40 mm  QF 2-pounder
47 mm  Ordnance QF 3-pounder
57 mm  6pdr OQF Mk.III · 6pdr OQF Mk.V
75 mm  OQF Mk.V
76 mm  OQF 3-inch Howitzer Mk I · OQF 3in 20cwt · QF 17-pounder
77 mm  OQF Mk.II
84 mm  20pdr OQF Mk.I
94 mm  28pdr OQF · 32pdr OQF · OQF Mk.II
95 mm  Howitzer, Tank No.1, Mk.I
105 mm  LRF · Royal Ordnance L7A1
120 mm  Ordnance QF Tk. L1A2 · Ordnance BL Tk. L11 · L11A5 · L30A1
165 mm  ORD BL 6.5in L9A1
183 mm  QF L4A1
  Foreign:
25 mm  M242 (USA)
37 mm  M5 (USA) · M6 (USA)
75 mm  M2 (USA) · M3 (USA)
84 mm  kan Strv 81 (Sweden)
105 mm  Sharir (Israel)
120 mm  Rh120 L/55 A1 (Germany)
125 mm  2A46M-5 (Russia)
155 mm  M185 (USA)
  South Africa
20 mm  GI-2
76 mm  GT-4
90 mm  GT-2
105 mm  GT-3 · GT-7 · GT-8
155 mm  G6 L/45

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