CARTRIDGE QF 40 MM L-70 HE
GENERAL :
The Bofors 40mm Automatic Gun L-70 on Field Mounting is a close range anti-aircraft weapon, mounted in a single-barrel mounting on a 4 wheel trailer carriage. It is intended for engaging high speed air-craft flying at low altitude, its chief characteristics being high speeds of elevation and traverse combined with a high rate of fire. The gun is normally fired electrically from remote control. It can also be fired electrically from the gun position by means of the Bofors local power control. In case power supply fails, the gun can be operated purely mechanically from the mounting.

The gun is a development of the original 40 mm Bofors gun, the term L-70 referring to the length of the barrel in calibres. Although it is a rapid fire automatic weapon, it can be set for a single shot, It is fed by an automatic mechanism into which 4-round clips are loaded by hand. This ammunition is manufactured to government of India, Ministry of Defence drawing No. IRW 115 GF and Bofors specification number D 200-H (C)
PHYSICAL PARAMETERS :
Total length of ammunition 534.4mm (max)
Total mass of ammunition 2.4 kg
Mass of projectile 0.96 kg (Approx)
Propellant (ACM) 0.43 kg (Approx)
Weight of bursting charge (TNT) 0.115 kgs
Net explosive content 627.75 g
 
PERFORMANCE CHARACTERISTICS :
Muzzle velocity

1000 m/s ± 10 m/s

Time for self destruction 8 sec
Rate of fire 4 rounds/sec
Maximum horizontal range 12600 m
 
SPECIAL FEATURES :
The ammunition has the following special features :
a) High fire power
b) Long range
c) Increased target effect
d) Rapid target slewing and accurate target tracking
SAFETY :
The Fuze FZ 104 assembled into the shells has the following safety arrangements:
a) The striker is held in its position by a supporting cross pin and inner sleeve till it gets an impact.
b) The sleeve provides safety against functioning by rain drops.
c) The stirrup spring of the firing pin locks the rotor in the unarmed position during storage and transport.
d) After firing, the delayed arming pellet prevents the firing pin from being pushed up by its spring to release the rotor, until it is consumed. This ensures a delay in arming at least 60m from the muzzle of the gun.
RELIABILITY :
Due to its sound design and careful manufacture, the ammunition is very reliable for use in combat field environment.
SHELF LIFE :
The shelf life of the ammunition is 12 years.
PACKING :
Each round is packed in water proof laminated paper containers, the body & lid of which is closed with two turns of water proof tape adhesive. 12 such containered rounds are packed in one steel box.
STOWAGE DIMENSION :
Packing box size 624 mm x 250 mmx 319 mm
Gross weight 48.0 kgs
Net weight 30.8 kgs

Volume

0.048 cu m
 
HAZARD CLASSIFICATION :
Cartridge is classified in
Compatibility group F
Hazard division 1.2
Fire fighting class 1
Contact :

Marketing & Export Division
Ordnance Factory Board
Ayudh Bhawan
Government of India
Ministry of Defence
10A, S. K. Bose Road, Kolkata – 700 001, India.

Tel: 0091-33-2248 9027 / 2248 2103 / 2248 5077-80
Fax : 0091-33-2248 1748/2210 8235
Mail : ofbtrade@dataone.in
www.ofb.gov.in