D-68 ( GRAU Index - 2A21 ) - Soviet smooth-bore tank gun . Designed in Sverdlovsk OKB-9 .
| 2A21 (D-68) | |
|---|---|
| Type of | smoothbore gun |
| A country |  |
| Service History | |
| Years of operation | since 1961 |
| In service | |
| Production history | |
| Constructor | OKB-9 |
| Designed by | 1959 |
| Manufacturer | Plant number 9 |
| Total released | not less than 1200 |
| Characteristics | |
| Weight kg | 2150 |
| Barrel length mm | 6050 |
| Caliber mm | 115 |
| Gate | horizontal wedge |
| Recoil device | hydropneumatic |
| Elevation angle | -6 .. + 14 |
| Angle of rotation | 360 |
| Rate of fire rounds / min | to 10 |
| starting speed projectile, m / s | BTS : 1615 BCS : 950 OFS : 800 |
| Sighting range , m | BPS : 4000 BCS and OFS : 3300 |
| Maximum range, m | OFS : 8960 |
| Type of ammunition | automatic |
Content
- 1 History of creation
- 2 Design Description
- 2.1 Ammunition Used
- 3 Where to install
- 4 notes
- 5 Literature
Creation History
The D-68 gun was developed at OKB-9 at the Sverdlovsk Artillery Plant No. 9 for the T-64 medium tank . Adopted in 1961 [1] [2] .
Design Description
The main difference between the 2A21 and 2A20 guns was the introduction of a separate-shell loading. The main components of 2A21 were: the trunk, which consisted of a 52.6-gauge pipe, which was fastened with a casing in the chamber part, a breech and an ejector . The gun used a horizontal wedge bolt and a semi-automatic rolling type. The trigger mechanism consisted of a mechanical descent with an electrozapalny device. The descent mechanisms were located on the left side of the fence. Electrozapal was carried out by pressing the stabilizer button or the backup button on the handle of the lifting mechanism. The receiver group was mounted in a cradle of a hollow type, the design of which was cast halves welded together. Downstairs in the cradle tides were fixed the rods of hydraulic recoil devices and a hydropneumatic recuperator. The maximum length of the recoil of the gun during firing was 320 mm [3] .
Ammunition Used
| Table TTX shots used for firing a gun 2A21 [1] [4] [5] [6] | ||||||
| Shot index | Shell Index | Initial speed, m / s | Shot weight, kg | Projectile weight, kg | Mass of charge, kg | |
| Armor-piercing ammunition shells | ||||||
| 3ВБМ1 | 3BM5 | 1615 | 18.0 | 5.36 | 7.4 | |
| 3ВБМ5 | 3BM5 | 1615 | 18.0 | 5.36 | 6.6 | |
| Armor-piercing shaped-charge shells | ||||||
| 3ВБК4 | 3BK8M | 950 | 22.53 | 12.94 | 4.8 | |
| 3VBK8 | 3БК8 / 3БК8М | 950 | 22.5 | 12.94 | 4.42 | |
| High-explosive shells | ||||||
| 3BOF18 | 3OF17 | 800 | 18.0 | |||
| 3BOF19 | 800 | |||||
| 3BOF23 | 3OF17 | 800 | 27.4 | 18.0 | 4.3 | |
| 3BOF24 | 3OF17 | 800 | 27.0 | 18.0 | 4.32 | |
| 3BOF38 | 3OF28 | 27.03 | 18.1 | 4.32 | ||
Where to install
- Object 167ZH - Soviet experimental medium tank
- Object 432 - Soviet medium tank T-64
Notes
- ↑ 1 2 Guns of Soviet tanks 1945-70 Archived on May 5, 2014.
- ↑ About the factory - Special Design Bureau No. 9 . Artillery Plant No. 9. Date of treatment December 1, 2011. Archived July 29, 2012.
- ↑ M.V. Pavlov, I.V. Pavlov. Domestic armored vehicles 1945-1965 // Equipment and weapons: yesterday, today, tomorrow. - Moscow: Techinform, 2008. - No. 9 . - S. 47 .
- ↑ M.V. Pavlov, I.V. Pavlov. Domestic armored vehicles 1945-1965 // Equipment and weapons: yesterday, today, tomorrow. - Moscow: Techinform, 2008. - No. 9 . - S. 49, 56 .
- ↑ Catalog of modern Russian weapons, pp. 86, 102
- ↑ 3UBK10.00.00.000TO. Shot 3UBK10 with a guided projectile 9M117. Technical description and operating instructions, page 5
Literature
- A. Shirokorad. Guns of Soviet tanks (1945-1970) // Technique and armament. (inaccessible link)
- M.V. Pavlov, I.V. Pavlov. Domestic armored vehicles 1945-1965 // Equipment and weapons: yesterday, today, tomorrow. - Moscow: Techinform, 2008. - No. 9 . - S. 47, 54, 55 .
- Technical description of the T-64 tank. - Moscow: Military Publishing House of the Ministry of Defense of the USSR, 1969. - 624 p.
- The creation of the T-64 tank (fragments of history) // Polikarpov V.V. Bastion: Military-technical collection / Karpenko A.V .. - St. Petersburg. - No. 5 . - S. 19-24 .