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The ammunition is of UK origin and is fired through O.Q.F. 105/531A. This ammunition is identical to O.Q.F 20 Pr. Tank Gun. This can also be mounted on upgunned centurion tank. The Gun is fired electrically and is accurate for armour penetration at 914.38 metres. The ammunition is of Q.F. Fixed type. The cartridge case is made of brass to specification JSS-9535-2. The cartridge case is slightly tapered through out its length. The Shell body is made of steel to Specification JSS-9510-1 Gde SS/F-30. It is cylindrical in shape fitted with two driving bands. The shell is filled with RDX/WAX and one base fuze L29A3 is assembled into it. This ammunition is manufactured to Government of India, Ministry of Defence Specification No. IA 1207 and Drawing No. IRW 110 GF.
PHYSICAL CHARACTERISTICS
Total length of ammunition |
139.8 mm |
| Total mass of ammunition | 21.12 kgs |
| Mass of projectile | 11.25 kgs |
| Propellant (ACM) | 2.50 kgs |
| Explosive filling in Projectile | 2.20 kgs |
| Explosive filling in Fuze | 16.17 gms |
| Explosive filling Tracer | 33.44 gms |
| Explosive filling in Primer | 28.94 gms |
| Net explosive content | 4778.00 gms |
PERFORMANCE CHARACTERISTICS :
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Muzzle Velocity |
732 m/s |
| Maximum Range | 8000 m |
| Armour penetration | 120mm at 0 ° to 65 ° |
| Accuracy | Within 1 min SD upto1800 m (Horizontal & Vertical) |
The ammunition functions on the principle of Squash head and therefore is having a base fuze.
The fuze does not get armed unless it is spun above 7000 rpm. The primer also cannot be initiated unless it receives an electric impulse.
Due to its sound design and careful manufacture, the ammunition is very reliable for use in combat field environment.
Shelf life of the ammunition is 18 years
Each round is packed in waterproof laminated paper container, the lid and body of which is sealed together with two turns of tape adhesive waterproof. Two such containered rounds are finally packed in one steel box.
STOWAGE DIMENSION :
| Packing box size |
1097 mm x 413 mm x 195 mm |
| Gross weight | 66.0 kgs |
| Net weight | 22.5 kgs |
| Volume | 0.088 cu. m |
HAZARD CLASSIFICATION :
| Cartridge is classified in Compatibility group |
F |
| Hazard division | 1.2 |
| Fire fighting classification | 2 |
Ordnance Factory Board
Ayudh Bhawan
Government of India
Ministry of Defence
10A S. K. Bose Road. Kolkata - 700 001, India.
Tel: 0091-33-248 9027 / 248 2103 / 248 5077-80
Fax : 0091-33-248 1748/210 8235
Mail : ofbtrade@dataone.in
http://www.ofbindia.com