Main Charge
Definition
The bulk explosive. Low explosive (black powder, KClO3 mixtures) for desi bombs; high explosive (RDX, TNT, PETN, ANFO) for pressure-cooker, tiffin and vehicle-borne devices.
- Function
- Bulk explosive material of a device
- Low-explosive examples
- Black powder, KClO3 mixtures
- High-explosive examples
- RDX, TNT, PETN, ANFO
- Common device use
- Desi bombs (low); pressure-cooker/vehicle IEDs (high)
Common questions
Why does a desi bomb typically use a low explosive as its main charge instead of a high explosive?+
Low explosives like black powder or chlorate mixtures are more accessible and easier to improvise without specialised precursors, though they produce a slower deflagration rather than the high-order detonation of a military explosive.
How does the main charge differ from a booster or detonator in an IED?+
The main charge is the bulk material producing the primary blast effect, while the detonator or booster is a smaller, more sensitive component whose job is to reliably initiate that bulk charge.
Related terms
- Country-Made Bomb (Desi / Sutli Bomb)
- Hand-thrown device built around KClO3 plus sulphur (or KNO3 plus S plus C, or amorphous P plus KClO3), wrapped in jute, paper...
- Four-Component IED Model
- Initiator, main charge, switch (trigger), power source. Plus the container or casing that confines the blast and supplies shrapnel. Every IED maps...
- IED (Improvised Explosive Device)
- Any explosive device built outside the military or commercial supply chain. The explosive, the trigger or the casing (often all three) is...
- Initiator
- Starts the explosive train: blasting cap or detonator (electric or non-electric), safety fuse, nitrocellulose fuse, or shock tube.
- Render-Safe Procedure (RSP)
- NSG / state BDS actions to neutralise a suspect device without detonating it. Tools: disruptors (water-cannon, PAN), portable X-ray, robots (DRDO Daksh,...
- Switch (Trigger)
- Closes the firing circuit. Time-delay, command-wired, radio-controlled (RCIED), or victim-operated (pressure plate, tripwire, anti-handling).
- VBIED / SBBIED
- Vehicle-Borne IED (truck, car, scooter) and Suicide Bomber-Borne IED (belt, vest, body-worn). Pulwama 2019 was a VBIED; Rajiv Gandhi 1991 was an...