Interesting post on MoA concerning effort required for bunker busting.
“The 30-ton GBU-57A/B MOP is capable of penetrating hundreds of meters of fortified underground facilities.”
Total Bullshit.
It couldn’t even penetrate one hundred meters of water.
Some info on bunker busters.
The BLU-109 is roughly 900kg and like the GBU-57, is a penetration weapon. It can break through around 1.2m to 1.8m of reinforced concrete, and packs about 240kg of explosives.
The GBU-28 is a laser-guided weapon, weighing nearly 2,300kg. It can penetrate up to 6m of concrete.
The GBU-43/B Massive Ordnance Air Blast Bomb is about 9m long and weighs around 9,800kg. As its name indicates it explodes above ground, i.e., it penetrates 0m of concrete. It can do significant damage to bunkers that are not that deeply buried.
The GBU-43/B was referred to as the “mother of all bombs”, and was supposedly used against Islamic State militants in Afghanistan in 2017.
The GBU-57 is about 6.2m-long and weighs approximately 13,600kg.
How deep can the GBU-57 penetrate?
Before a GBU-28 can penetrate 6 meters it has to move the concrete in front of it out of the way.
This concrete is pulverized and blown upwards into the air.
This requires expelling a 6 meter deep conical shaped mass of concrete.
If you want to penetrate 12 meters you have to expel a 12 meter conical shaped mass of concrete.
This 12 meter conical volume has 8 times the mass of the 6m cone.
Therefore you need 8 times the energy to move it.
So your projectile needs to be eight times as heavy, i.e., 8 x 2,300 = 18,400 kg
To penetrate 24 meters the projectile needs to be 64 times as heavy as the GBU-28, i.e., 64 x 2,300 = 147,200 kg
Posted by: bunkered | Jun 20 2025 21:22 utc