Name: 115 mm HE-FRAG(FS) 3OF18, 3OF27 and 3OF28
Availability: InStock

Item Type

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Type

Action

Guidance

Caliber

Weights complete round

Weights projectile

Weights filling

Weights propellant

Length, complete round

Projectile length

Diameter over extended fins

Muzzle velocity

Max range

Operating temperature range

Northern Africa

Egypt

Western Asia

Iraq

Eastern Europe

Bulgaria

<h2>Armament</h2><p>115 mm U-5TS (2A20) tank gun; Royal Ordnance (now RO Defence)115 mm tank gun.</p><h2>Development</h2><p>The general purpose 115 mm HE-FRAG(FS) 3OF18 projectile is referred to in Eastern Bloc literature as an extended range projectile. It replaced the earlier 3OF11 but has now been joined by what are described as third-generation HE-FRAG(FS) known as the 3OF27 and 3OF28. Compared to the 3OF18, these have a slightly revised outline, thinner body walls and a heavier filling consisting of a more powerful explosive. Many early models of the T-62 tank may not be able to use the 3OF27 or 3OF28 due to fire control system limitations. The 3OF18 projectile is utilised with the 3UOF6 round while the 3OF27 is used with the 3UOF37 round. The earlier 3OF11 was used with the 3UOF1 round. The 3UOF37 round appears to be the only version in this series in current production. Manufacturing is carried out by the Engineering Research Institute (NIMI) based in Moscow. Out of its normal combat load of 40 rounds a T-64 normally carries 19 HE-FRAG(FS) rounds.</p><h2>Description</h2><p>The 115 mm HE-FRAG(FS) 3OF18, 3OF27 and 3OF28 projectile assemblies are crimped into brass cartridge cases to form fixed rounds. The projectiles are steel and conventional in body outline but the 3OF27 and 3OF28 have a slightly longer streamlined ogive. The wall thickness of the 3OF18 is 13.34 mm at the bourrelet while the 3OF27 is 12.62 mm. The single copper drive band on the 3OF18 is 10.92 mm wide, while on the 3OF27 it is 11.33 mm wide. Bodies have a boat-tailed base with the bases threading into a steel boom extension carrying four steel forward-folding fins. The fins snap out once the projectile has left the muzzle; the diameter is 325.12 mm. The explosive filling for the 3OF18 is 2.788 kg of TNT, for the 3OF27 it is 3.062 kg, while for the 3OF28 it is 3.1 kg. In the last two cases the explosive is A-IX-20 (75 per cent RDX, 22 per cent Aluminium and 3 per cent Wax). Projectiles are fitted with a nose-mounted V-429E point detonating fuze made of steel. The rimmed brass (4G10A) or lacquered steel (4G9) cartridge case has an unusual shape as it is necked approximately halfway along its length. The contents consist of 4.65 kg of DG-4 15/1 propellant. The base is fitted with a KV-5-U electrical primer with a long flash tube. The muzzle velocity of the 3OF18 is 750 m/s; for the 3OF27 and 3OF28 it is 800 m/s. Maximum effective combat range is between 1,500 and 2,000 m and the maximum possible range is of the order of 9,500 m, although accuracy at that range will be minimal. A training round intended specially for training tank crews is the 115 mm 3UOFT6 training round with a 3OFT18 HE-T projectile. The projectile is fired at a muzzle velocity of 800 m/s and emits four independent No 1 tracers for up to 5 seconds from a location in the base so that the trajectory can be followed for training assessment and marking purposes. As the projectile passes through a soft training target the nose-mounted VUBS-1M super-quick point detonating fuze functions to detonate the projectile's TNT bursting charge less than 5 m behind the target. Should the projectile fail to hit a target it will self-destruct after about 4 to 6 seconds at a maximum range of 12,230 m. The complete 3UOFT6 round weighs 30.8 kg and has a steel cartridge case containing 4.65 kg of DG-4 15/1 propellant. The 115 mm 3UOFT6 training round is marketed by Kintex of Bulgaria .</p><h2>Authorised fuzes</h2><p>PD V-429E Equivalent rounds BULGARIA</p><p>BULGARIA</p><h2>Manufacturer</h2><p>Kintex</p><p>Type: UOFT6 Prac</p><p>Description: Training round - see text</p><h2>Manufacturer</h2><p>KAS Engineering Company</p><p>Type: 3UOF6 with 3OF18</p><p>Description: Max range given as 12,230 m. Steel or brass cases available</p><p>EGYPT</p><h2>Manufacturer</h2><p>Heliopolis Company for Chemical Industries</p><p>Type: HE-FRAG(FS)</p><p>Description: Believed to be equivalent of 3OF18. Muzzle velocity given as 800 m/s. Fitted with AU-20</p><p>E fuze. In Egypt the U-5TS gun is known as the Y5TC-T62. Many Egyptian T-62s now have</p><p>British-manufactured 115 mm barrels</p><p>IRAQ</p><h2>Manufacturer</h2><p>State factories</p><p>Type: 115 mm HE</p><p>Description: Believed to be HE-FRAG(FS) 3OF18 but may be the earlier 3OF11. No further</p><p>information available but probably no longer in production</p>

The 115 mm HE-FRAG(FS) 3OF18, 3OF27 and 3OF28 projectile assemblies are crimped into brass cartridge cases to form fixed rounds. The projectiles are steel and conventional in body outline but the 3OF27 and 3OF28 have a slightly longer streamlined ogive. The wall thickness of the 3OF18 is 13.34 mm at the bourrelet while the 3OF27 is 12.62 mm. The single copper drive band on the 3OF18 is 10.92 mm wide, while on the 3OF27 it is 11.33 mm wide. Bodies have a boat-tailed base with the bases threading into a steel boom extension carrying four steel forward-folding fins. The fins snap out once the projectile has left the muzzle; the diameter is 325.12 mm. The explosive filling for the 3OF18 is 2.788 kg of TNT, for the 3OF27 it is 3.062 kg, while for the 3OF28 it is 3.1 kg. In the last two cases the explosive is A-IX-20 (75 per cent RDX, 22 per cent Aluminium and 3 per cent Wax). Projectiles are fitted with a nose-mounted V-429E point detonating fuze made of steel. The rimmed brass (4G10A) or lacquered steel (4G9) cartridge case has an unusual shape as it is necked approximately halfway along its length.

The contents consist of 4.65 kg of DG-4 15/1 propellant. The base is fitted with a KV-5-U electrical primer with a long flash tube. The muzzle velocity of the 3OF18 is 750 m/s; for the 3OF27 and 3OF28 it is 800 m/s. Maximum effective combat range is between 1,500 and 2,000 m and the maximum possible range is of the order of 9,500 m, although accuracy at that range will be minimal. A training round intended specially for training tank crews is the 115 mm 3UOFT6 training round with a 3OFT18 HE-T projectile. The projectile is fired at a muzzle velocity of 800 m/s and emits four independent No 1 tracers for up to 5 seconds from a location in the base so that the trajectory can be followed for training assessment and marking purposes. As the projectile passes through a soft training target the nose-mounted VUBS-1M super-quick point detonating fuze functions to detonate the projectile's TNT bursting charge less than 5 m behind the target.

Kintex

115 mm HE-FRAG(FS) 3OF18, 3OF27 and 3OF28

115 mm HE-FRAG(FS) 3OF18, 3OF27 and 3OF28

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