Damage mechanics - Revision history

U44982996: added a bit about hull break in coastal

2024-11-13T00:22:29Z

added a bit about hull break in coastal

U44982996: wrote some summary about naval damage model

2024-10-24T17:15:14Z

wrote some summary about naval damage model

U116381122: /* Normalization */ corrected a typo - line of side to line of sight

2024-10-02T08:13:29Z

‎Normalization: corrected a typo - line of side to line of sight

U44629479: Edits

2022-06-22T23:22:02Z

Edits

Show changes

U91234167: /* Normalization */ Pretty sure APCR-FS doesn't exist.

2022-02-13T03:21:35Z

‎Normalization: Pretty sure APCR-FS doesn't exist.

U44629479: Edits

2021-11-09T14:15:10Z

Edits

U42773747: /* Overpressure */ rewrote heat/hesh tip to accommodate for the fact that some atgm can gib through 30 mm RHA. I am unaware if hesh had any changes in this department.

2021-11-09T14:04:21Z

‎Overpressure: rewrote heat/hesh tip to accommodate for the fact that some atgm can gib through 30 mm RHA. I am unaware if hesh had any changes in this department.

U44629479: Undo revision 105786 by U91234167 (talk)

2021-06-14T17:26:44Z

Undo revision 105786 by U91234167 (talk)

U91234167: /* Hull-break */

2021-06-14T05:14:32Z

‎Hull-break

U44629479: /* Hull-break */ Hullbreak for naval

2021-05-12T15:41:21Z

‎Hull-break: Hullbreak for naval

@@ Line 64: / Line 64: @@
 The [[wt:en/news/4505-the-damage-model-has-been-refined-en/|initial version]] set the criteria as "on the kinetic impact, hits with penetration of the shell of 150 mm calibre on any part of the hull or turret (inclusive of the breech). Or even hitting following penetration of few structural elements of shells of small calibre, upwards of 75 mm and higher. For HE shells, impacts by 75-76 mm HE shells to the hull or turret will be effective. For large calibre HE shells (122-152 mm) hits to chassis components will be counted as fatal."
-In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure|overpressure]] mechanic.
+In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure|overpressure]] mechanic. However, a modified version of this mechanic is still present in Naval Battles.
 ====Overpressure====
@@ Line 85: / Line 85: @@
 ==== "Simple" damage model ====
 A vessel with "simple" damage model has their hull divided into multiple sections (min. 3) which is treated as its own crew compartments. When any weapon managed to damage the specific section of the vessel, it will result in a crew loss that reduce the overall crew of the vessel. Should a section of the vessel were extensively damaged i.e. "blackened", that section will no longer take any further crew damage as all of them has already been wiped out. Therefore requiring the player to hit the more "healthy" section of the boat to deal crew damage and finally sink the enemy vessel.
 Typically, any vessel with less than 500 tons of displacement will have a "simple" damage model.

@@ Line 5: / Line 5: @@
 === Aviation ===
 The game's engine simulates every bullet that is fired for over 2 km before they are deleted, with exceptions for bigger shells such as those fired by the [[BK 5 (50 mm)|50 mm BK 5]] or [[Molins Class M (57 mm)|57 mm Molins]] cannons. The different shells also have different effects on module damage. More of these shell effects can be read in the [[:Category:Ammunition|Ammunition section]].
-Every aircraft has its skin airfoil and material modeled, too. It is therefore possible to see a tracer shell ricochet off an enemy plane's duralumin skin. Some aircraft are quite well armoured from certain angles.  For example, the TB-3 is constructed mainly with 3 mm of corrugated steel. The [[IL-2 (Family)|IL-2]]  and [[IL-10]] series of Russian attackers are also quite durable.
+Every aircraft has its skin airfoil and material modeled, too. It is therefore possible to see a tracer shell ricochet off an enemy plane's duralumin skin. Some aircraft are quite well armoured from certain angles. For example, the TB-3 is constructed mainly with 3 mm of corrugated steel. The [[IL-2 (Family)|IL-2]]  and [[IL-10]] series of Russian attackers are also quite durable.
-====Naval targets====
+====AI naval targets====
 Naval targets in air battles have their own damage mechanics modeled. See [[AI_ship_damage_models|this page]] for more detail.
@@ Line 81: / Line 81: @@
 Overpressure damage can be reduced or negated by tanks with compartment separators (internal RHA screens, engine compartment being used as a shield, etc.), meaning only the crew in hit part of the tank will take damage.
 ==Creating digital weaponry==
 The following is an exclusive essay by the Gaijin development team to explain how guns' real life behaviour is translated into the game. Hence the focus is primarily on the [[Ground vehicles|ground forces]] part of War Thunder. Also the tone of the text is more personal than usual on the WT Wikipedia.

@@ Line 21: / Line 21: @@
 The calculation of the armour piercing effect of projectiles on sloped armour:
-Before the [[Update 1.49 "Weapons of Victory"|"Weapons of Victory" update]], the armour-piercing effect calculation of an angled hit was made based on the normal principle for most tank-based games via normal line of side thickness, as seen in the picture above.<br>
+Before the [[Update 1.49 "Weapons of Victory"|"Weapons of Victory" update]], the armour-piercing effect calculation of an angled hit was made based on the normal principle for most tank-based games via normal line of sight thickness, as seen in the picture above.<br>
 At the same time (still before "Weapons of Victory"), for different types of shells a certain distortion of the angle of attack was taken into account depending on the type of projectile (sharp or blunt-nosed shell) and the ratio between the calibre of the projectile to the armour thickness normal (perpendicular vector). In blunt-nosed shells, the final angle which were used for calculation of the armour thickness was reduced, and in sharp-nosed shells - slightly increased, i.e. a normalization factor was artificially added after the crude line of sight thickness calculation.<br>
 However, despite the fact that this method is good enough in most cases - the calculation results do not always completely agree with the actual results of tank armour penetration tests. This was particularly noticeable in cases of penetration with high angles of approach.

@@ Line 30: / Line 30: @@
 [[File:DamageMechanics ShellPenetration BluntNormalizationForces.jpg|thumbnail|right|Blunt-nosed shell impacting, affected by normalization forces.]]Blunt-nosed shells, when hitting an obstacle with its “blunted” tip, will form a ledge in the armour, and will gain from the obstacle and ledge a greater tangential and lesser normal reactions. The moment of the resultant will angle-in the shell towards the normal and as a result it reduces the path of the projectile inside the armour.
-The larger is the elongation (length-to-diameter ratio) of the projectile - the stronger is the normalization effect of the projectile. Modern fin-stabilized APCR munitions have a greater elongation and during an angled hit often penetrate thicker armor than the equivalent of a plate normal.<br>
+The larger is the elongation (length-to-diameter ratio) of the projectile - the stronger is the normalization effect of the projectile. Modern APFSDS munitions have a greater elongation and during an angled hit often penetrate thicker armor than the equivalent of a plate normal.<br>
 However, the projectiles that are modeled in our game were fairly short ones and at high angles of attack had a large de-normalizing effect - both sharp-nosed (for which this effect was bigger), and blunt-nosed (with a smaller effect). The APCR shells of the time had the maximum effect. Thus for the American 90mm APCR prototype M304 shell (''Terminal ballistic Data Vol 3'' p.157) as we can see the penetration value at an angle of attack of 55 degrees is more than 3 times less than penetration by normal (see Pic.4). If at an angle of 0 degrees of attack, the projectile could penetrate a little more than 12 inches of armour (305 mm), an angle of approach of 55 degrees makes the shell penetrate a little less than four inches (101.6 mm); '''Picture 1'''. Which is comparable with penetration values of the T33 calibre sharp-nosed shell; '''Picture 2'''
 <gallery>

@@ Line 4: / Line 4: @@
 == Damage calculation ==
 === Aviation ===
-The game's engine simulates every bullet that is fired for over 2 km before they are deleted, with exceptions for bigger shells such as those fired by the [[Me 410 A-1/U4|50mm Bk5]] or [[Mosquito FB Mk XVIII|57mm Vickers]] cannons. The different shells also have different effects on module damage. More of these shell effects can be read in the '''''[[:Category:Ammunition|Ammunition section]]'''''.
+The game's engine simulates every bullet that is fired for over 2 km before they are deleted, with exceptions for bigger shells such as those fired by the [[Me 410 A-1/U4|50mm Bk5]] or [[Mosquito FB Mk XVIII|57mm Vickers]] cannons. The different shells also have different effects on module damage. More of these shell effects can be read in the '''[[:Category:Ammunition|Ammunition section]]'''.
 Every aircraft has its skin airfoil and material modeled, too. It is therefore possible to see a tracer shell ricochet off an enemy plane's duralumin skin. Some aircraft are quite well ''armoured'' from certain angles.  For example, the TB-3 is constructed mainly with 3 mm of corrugated steel.  The [[IL-2 (Family)|IL-2]]  and [[IL-10]] series of Russian attackers are also quite durable.
@@ Line 73: / Line 73: @@
 For closed-up vehicles, this happens when explosion effect manages to penetrate the armour of the vehicle:
-'''For HE''', overpressure damage is calculated when a shell fragment from an explosion hits something inside of the vehicle, proving that explosion got inside of it. This leads to high-yield explosives nearly always taking out a vehicle in a single hit, due to the shockwave being able to move around frontal armour and to hit the entirety of the crew that way.
+For HE, overpressure damage is calculated when a shell fragment from an explosion hits something inside of the vehicle, proving that explosion got inside of it. This leads to high-yield explosives nearly always taking out a vehicle in a single hit, due to the shockwave being able to move around frontal armour and to hit the entirety of the crew that way.
-'''HEAT and HESH''' shells and ATGM can also create overpressure damage but are less effective at it compared to HE ammunition and seem to only affect vehicles when very thin parts of the hull or their critical weakspots are hit directly, with overall Armour thickness of hit surface having to be below 15 mm RHA, since their explosive power is directed towards creating special effects (molten jet for HEAT and scabbing for HESH) instead of producing shockwaves. There are exceptions in HEAT ammunition, which can deal overpressure damage through 20 (select few powerful HEAT ATGM) or 30 (most tandem missiles) mm RHA. Tanks with reasonable amount of armour '''will not''' take overpressure damage from HEAT, even if special effect penetrates them easily.
+HEAT and HESH shells and ATGM can also create overpressure damage but are less effective at it compared to HE ammunition and seem to only affect vehicles when very thin parts of the hull or their critical weak spots are hit directly, with overall armour thickness of hit surface having to be below 15 mm RHA, since their explosive power is directed towards creating special effects (molten jet for HEAT and scabbing for HESH) instead of producing shockwaves. There are exceptions in HEAT ammunition, which can deal overpressure damage through 20 mm (select few powerful HEAT ATGM) or 30 mm RHA (most tandem missiles). Tanks with reasonable amount of armour will not take overpressure damage from HEAT, even if special effect penetrates them easily.
-This mechanic affects vehicles with thin armour negatively, but, unlike with the hullbreak, '''any''' tanks are potentially vulnerable to overpressure damage. As a result, it makes not only light, but also heavy tanks easier to destroy by using bombs, rockets, big HE shells or artillery strikes. To utilize the mechanic effectively, be sure to aim for a weak spots on the armour, such as roofs, vents, bellies, tank rear and overtrack sponsons, to maximize the chance of a successful penetration.
+This mechanic affects vehicles with thin armour negatively, but, unlike with the hullbreak, any tank is potentially vulnerable to overpressure damage. As a result, it makes not only light, but also heavy tanks easier to destroy by using bombs, rockets, big HE shells or artillery strikes. To utilize the mechanic effectively, be sure to aim for a weak spots on the armour, such as roofs, vents, bellies, tank rear and overtrack sponsons, to maximize the chance of a successful penetration.
 Overpressure damage can be reduced or negated by tanks with compartment separators (internal RHA screens, engine compartment being used as a shield, etc.), meaning only the crew in hit part of the tank will take damage.

← Older revision		Revision as of 17:26, 14 June 2021
Line 65:		Line 65:

	In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure\|overpressure]] mechanic.		In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure\|overpressure]] mechanic.
−
−	~~Note: You can still hull-break those stationary ground vehicles if you test-drive (or rather, test-fly) a bomber and drop a large bomb.~~

	====Overpressure====		====Overpressure====

← Older revision		Revision as of 05:14, 14 June 2021
Line 65:		Line 65:

	In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure\|overpressure]] mechanic.		In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure\|overpressure]] mechanic.
		+
		+	Note: You can still hull-break those stationary ground vehicles if you test-drive (or rather, test-fly) a bomber and drop a large bomb.

	====Overpressure====		====Overpressure====

@@ Line 59: / Line 59: @@
 ====Hull-break====
-{{Notice| This mechanic is no longer in use and has been replaced.}}
+{{Notice| This mechanic is no longer in use in ground battles and has been replaced by [[#Overpressure|overpressure]]. However, hullbreak remains active in naval battles for coastal ships.}}
 In [[Update 1.65 "Way of the Samurai"]], the hull-break mechanic was added into the game for thin-hulled vehicles. This generally applies to non-armoured and lightly-armoured vehicles (with up to 25 mm thickness of hull armour). Unlike the usual method of incapacitating the crew members of a vehicle to secure a destruction, the hull-break mechanics implements a hull and module based damage system to destroy these vehicles.
 The [[wt:en/news/4505-the-damage-model-has-been-refined-en/|initial version]] set the criteria as "on the kinetic impact, hits with penetration of the shell of 150 mm calibre on any part of the hull or turret (inclusive of the breech). Or even hitting following penetration of few structural elements of shells of small calibre, upwards of 75 mm and higher. For HE shells, impacts by 75-76 mm HE shells to the hull or turret will be effective. For large calibre HE shells (122-152 mm) hits to chassis components will be counted as fatal."
-In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely, in favour of the more advanced and realistic [[#Overpressure|overpressure]] mechanic.
+In [[Update 1.71 "New E.R.A"]], the hull-break mechanics was refined towards kinetic shells as requiring the "need to directly hit them with a shell of high energy (more than 1.4 MJ) on one of the major internal modules. E.g. engine, transmission, breech or shell storage." In [[Update "Ixwa Strike"]], the hull-break mechanic was removed entirely from ground battles, in favour of the more advanced and realistic [[#Overpressure|overpressure]] mechanic.
 ====Overpressure====