Vol.7     No.5      October1999                                                                 ISSN:0971-4413
Bulletin of Defence Research & Development Organisation


Light weight RL weaponThe antitank capability to the infantry is greatly provided by the shoulder fired 84 mm RL weapon. This however does not fully meet the man-portable requirement due to its excessive weight of 16.5 kg. This necessitated the development of a light-weight equipment for achieving ease of operation and man-portability without compromising on the existing capabilities. Using state-of-the- art composite technology and light weight engineering material, DRDO has developed a light-weight weapon (84 mm Mk III) weighing only 10.5 kg and thereby achieving a weight reduction of six kg. The barrel has been made of ‘hoop over binding’ of carbon-epoxy composite over thin steel liner (rifled). Aluminium mounting brackets for the sighting system, firing mechanism and furnitures are attached to the barrel by winding with glass rovings. The brackets are positioned by use of special purpose machine. Thus the technology of a composite gun barrel has been developed for the first time in the country. The Mk III weapon fires the existing in-service ammunition. The weapon has already been offered for user trials.



Conventional 1000 lb class of aircraft bombs offer more drag, thereby adversely affecting the operational efficiency of modern high speed aircraft. Keeping this in view, DRDO has designed and developed high speed low drag (HSLD) bombs in 450 kg and 250 kg class suitable for carriage and release by modern aircrafts. These bombs are effective against ground targets like railway yards/bridges, major installations, bunkers, runways and hARDEned targets.

The bomb consists of two major subsystems, namely, bomb body filled with HE and tail unit. Two types of tail units, RetARDEr Tail Unit (RTU) for high speed low level bombing and Ballistic Tail Unit (BTU) for high speed high altitude bombing have been developed for the bomb to be used in different tactical roles.

250kg HLSD bomb

The HE filling of the bomb is Dentex (RDX/TNT/Aluminium) for achieving maximum blast and fragmentation effect for inflicting maximum damage to the target. The bomb can be carried on various in-service aircraft like, Jaguar, MiG and futuristic combat aircraft of the the IAF.                    450 kg HLSD bomb

The 450 kg HSLD Bomb is already in service and under production at the Ordnance Factories. The 250 kg HSLD Bomb with RTU has been introduced in the Services. BTU has successfully completed flight trials and awaiting introduction into the Services.

Salient Features


450 kg HSLD 250 kg HSLD


450 kg 250 kg
Length  2880 mm with TU 1537 mm with TU

Max. Dia

360 mm 290 mm

CG Position with TU

1165 mm from Nose 971 mm from Nose
Filling HE (Dentex) HE (Dentex)

Weight of filling (kg)

210 101
Carriage  By high speed combat aircraft By high speed combat aircraft
Carriage speed Up to 700 kts (1.1 mach) 863 kts (1.3 mach)
Release speed 650 kts (0.98 mach) 650 kts (0.98 mach)
Suspension Twin 250 mm & 356 mm Twin 250 mm & 356 mm
Effectiveness Can be used against targets like runway railway tracks, bridge, docks,bunkers Can be used against  railway marshalling yards ,runways,

hARDEned targets and built up installations


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Armaments,Indian Small Arms System, MultiBarrel Rocket System- Pinaka ,Fin Stabilized Armour Piercing Discarding Sabot, Illuminating Ammunition ,Bund Blasting Device,30mm HE Grenade for AGL,Charge Line Mine Clearing Equipment ,Propellant Technology, 84mm Light Weight RL Weapon ,Warheads ,Lead Zirconate Titanate Based Piezoceramics ,Armament Research Board