This bomb is suitable for use with Hotchkiss Brandt mortars, of the following types:
i) MO-81-61 C Short barrel
ii) MO-81-61 L Long barrel
It produces smoke for screening and spotting purposes.
TECHNICAL DATA (81 MM HE M 57 D A2)
Complete Round
Weight with fuze
3.2 kg
Length with fuze
382 mm
Projectile
Body Material
Forged Steel
Color
Olive drab or deep bronze green
Explosive charge
650 gm of TNT
Fuze
Detonating direct action type with optional delay of 0.05 sec
Other Components
Primary cartridge
Double base propellant GBPa 0.15x1x1 in rolled paper tubes weighing 8.2 gm. (Type Z 58C)
Augmenting charge
7 horseshoe charges containing double base propellant GB Pa 0.25x2.5x2.5 each weighing 10.5 gm.
Tail unit
10 Aluminium alloy fins
Performance
Velocity
291 meters/sec
Accuracy:
Longitudinal PE
32 metres
Lateral PE
7.5 metres
Pressure :
Short barrel
100-510 kg/sq.cm.
Long barrel
100-570 kg/sq.cm.
Range:
Short barrel
100 - 4140 meter max
Long barrel
100 - 4550 meter max
Packing
3 bombs packed in waterproof cardboard/plastic container with carrying handle and 2 carriers (6 bombs) packed in a steel box: