What is a therombarbaric warhead?

Answer 1

A thermobaric weapon (these are NOT nuclear weapons) is a weapon which produces a sustained shock wave (LIKE a nuclear weapon) through convential means. It often relies on atmospheric oxygen as the oxidizer, instead of it being carried onboard mixed with the explosive.

Typically these weapons contain a burster charge, which scatters the fuel. Very shortly after, another charge explodes and ignites the fuel and air mixture, producing a very intense explosion.

These weapons are good for use in caves or buildings, as they can cause significant damage to the building and personnel within it. These weapons don't work well at altitude or underwater.

Fuel-Air weapons are a class of thermobaric weapon.