This makes not only light but also heavy tanks easier to destroy by bombs, rockets, large HE grenades, or artillery strikes. This "Overpressure" mechanic negatively affects vehicles with thin armour, but unlike "Hull Break", all tanks are potentially vulnerable to overpressure damage. the German SPG Ferdinand, the overpressure mechanism will operate separately and independently for the crew of the command compartment and for the crew members in the fighting compartment. For vehicles with a crew located in different compartments, e.g. For Leopard 2 tanks, ammunition in the turret stowage compartment is excluded from this list, but grenades in the forward part of the hull are included and therefore counted as possible damage modules. For example, in Soviet main battle tanks, the battle compartment contains the entire vehicle crew, ammunition, target drives, internal fuel tanks, gun breech, and radio equipment.Ī Soviet T-64A Main Battle Tank demonstrating its auto-loader system.įor M1 Abrams tanks, fuel tanks and ammunition located in separate armoured compartments are excluded from this list of modules estimating damage. A "compartment" in this case means a volume containing modules used to estimate damage. If the fragmentation or high explosive effect of an explosion hits one of the internal modules located in the battlespace (crew, tanks, breech, ammunition, propulsion), it means that the explosion was strong enough to penetrate the armour at the point of impact and therefore the crew is affected by overpressure, in addition to other damaging factors. For open-top vehicles, this occurs whenever the vehicle is within the fragmentation scatter radius of the grenade blast crewmen of a particular open-top vehicle are very exposed, meaning they are extremely vulnerable to any blast damage and therefore also the extreme pressure damage.įor closed vehicles, the overpressure calculations begin whenever the blast effect of the shell manages to penetrate the vehicle's armour. Overpressure damage calculations are performed when the crew is exposed to the overpressure wave coming from the impacted/exploded shell. The "Overpressure" mechanic simulates the extreme pressures generated by the shock wave of a HE-based shell explosion and its effect on the crew inside the vehicle. The blue depicts pressure, with different colors portraying injury severity (lower left of screenshot). Here an explosion through the turret roof. A hit by a penetrating shell of 150 mm in calibre on any part of the hull or turret would be considered fatal several penetrating hits on structural elements by shells of calibre 75 mm and higher would be considered fatal impacts of 75-76 mm HE shells to the hull or turret would be considered fatal, and a hit by a large calibre HE shell (122-152 mm) would also be considered fatal. In the initial version, "Hull Break" worked as follows. This change in damage model applied to lightly armoured vehicles, and allowed them to be "easily destroyed with weapons of 75mm calibre or more whilst using HE or HEAT ammo by hitting the hull, turret (if present) or gun barrel and mantlet." ** Unlike the usual method of incapacitating the crew members of a vehicle to secure destruction, the hull-break mechanics implement a hull and module based damage system to destroy vehicles with up to 25 mm thickness of hull armour (this would come to se several changes as the game advanced through eras of tanks). So, long ago, along with Update 1.65 "Way of the Samurai" in late December 2016, tankers of War Thunder saw the beginning of what would come to be called "Hull Break". This specific damage would be excess pressure damage at the front of a shell's shock wave, and it would come to be referred to as "Overpressure".Ī Panzer IV showing real-life "Hull break" after suffering hit by high-caliber Soviet HE round.īefore digging deeper into this new "Overpressure" mechanic, a short historical overview of War Thunder's HE and HEAT damage model(s) would be beneficial. How has "Overpressure" changed War Thunder's ground forces battles?Īlong with the introduction of Update "Ixwa Strike" (2.5), we saw a major change in how the impact of High Explosive fragmentation and shells affect various vehicles, with a hope from the War Thunder Team that the changes "make the damage model more realistic and transparent" * From here on, a new type of damage would guide or haunt War Thunder's tankers, depending on how you view it.
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