battlefield-4
In Battlefield 4 there are wide variety of rocket launchers (guided, unguided, etc.).
What launchers are most effective, in terms of available ammo and dealt damage?
What is best weapon to have against tanks, without friendly support with additional ammo?
There are 4 pillars on the front of the building which need to be destroyed. You can achieve this with RPGs, Tank shells, C4 and Missile emplacements. Also likely are Chopper rockets and IFV cannon, although I have not tested this.
The 4 pillars you need to destroy are the ones shown below. They already have some exposed reinforcement bars showing.
Each pillar takes 2x RPG shots to destroy, or 2x MBT rounds, or 2x TOW Stationary Emplacements or 5x C4 explosives. This be Beta values so this may change.
This is an "undamaged" pillar.
This is a "damaged" pillar.
This is a "destroyed" pillar. When all 4 look like this, it's time to GTFO.
Skill is normalized (as in between 0 and 1), but for display purposes it's multiplied by 1000 and rounded to nearest integer. In other words 100% perfect skill would be 1000. OTOH, someone scoring no points at all, would have score of 0.
As for how it's calculated, shortly after the question was posted here, it has been extracted from the game and posted on Symthic forums and subsequently on BF4 Reddit.
For a single game skill 60% of skill comes from SPM (capped at 1000), 30% comes from KPM (capped at 3.0), and 10% comes from KDR (capped at 5.0).
BTW. note that these calculations use SPM which excludes any bonuses and boosts (ie. as shown on scoreboard), while BattleLog displays SPM including bonuses and boosts.
To calculate this you first have to normalize each component:
normalized_SPM = min(SPM/1000.0, 1)
normalized_KPM = min(KPM/3.0, 1)
normalized_KDR = min(KDR/5.0, 1)
Now apply the percentages :
normalized_skill = .6 * normalized_SPM
+ .3 * normalized_KPM
+ .1 * normalized_KDR
skill = round(normalized_skill * 1000)
So above is skill for just one game. But what's is displayed in BattleLog is overall skill, which is calculated to the formula is 90% skill prior to current game + 10% current skill:
new_skill = round(.9 * old_skill + .1 current_game_skill)
In the battle report you can also see how the skill changed, which is calculated as follows:
skill_diff = new_skill - old_skill
Examples:
You had very intense game which lasted 20 minutes, in which you scored 5000 game points (not including bonuses and boosts), killed 30 people and died 45 times.
normalized_SPM = (5000/20.0)/1000 = .25
normalized_KPM = (30/20.0)/3 = .5
normalized_KDR = (30.0/45.0)/5 = .13
normalized_skill = .6*.25 + .3*.5 + .1 * .13 = 0.3133
this_round_skill = round(0.3133 * 1000) = 313
So if you'd play all rounds like that your skill would be 313.
Now another example, suppose in the same 20 minute game you were camping instead, you got 1000 points, 6 kills, 0 deaths (which counts as 1 actually). As said KDR is capped at 5, so that's what you put into the calculation.
normalized_SPM = (1000/20.0)/1000 = .05
normalized_KPM = (6/20.0)/3 = .1
normalized_KDR = (5.0/1)/5 = 1
normalized_skill = .6*.05 + .3*.1 + .1 * 1 = 0.16
this_round_skill = round(0.16 * 1000) = 160
OK, so suppose that you're starting skill was 186, in the first example
new_skill = round(.9 * 186 + .1 * 313) = 199
diff = +13
In second example:
new_skill = round(.9 * 186 + .1 * 160) = 183
diff = -3
So that's how it's calculated. This does not have anything to do with playing the objective, in fact if you just spam on Operation Metro, your skill is going to be way higher, than lets say trying to arm MComs on Operation Whiteout rush.
Best Answer
To take down a tank all by yourself, the best way is C4. It takes 3 C4 to be sure to kill a LAV, tank or boat. Jeeps and Armored transport (Humvees, Vans, etc) takes 2 for a sure kill.
Note that 2 piece of C4 might kill a tank if you put them on the right spot (mostly on it's rear from what I found). If you put two pieces on the sides, it will disable the vehicle and leave it burning giving time to the driver to jump out. If you put the 2 pieces of C4 on the front, it will disable but not put the vehicle on fire.
1 piece of C4 does a mobility hit for sure which can allow you to put more C4 instead of the tank running off.
Mines are also a good way to take care of tanks, but you must place them near it and hope it runs over it (or shoot them with the Rex/magnum/slugs from shotguns) or place them in popular spots for vehicles to get that random kill 5 minutes later.
For the launchers, this is what I found:
Also, I found this forum post: http://bf4central.com/battlefield-4-rocket-launchers/
For the damage stats versus vehicles per launchers, I could not find the stats. But I've heard that RPGs do the same damage as a tank shell. The angle is (like in BF3) primordial in BF4. If your rocket hits at 50 degrees, it will do around 20 to 25 damage while hitting a tank square on will do a disable in most cases. Tanks are also more resilient on the front to damage. Sides have less armor and even less armor to the rear.
Overall, killing a tank alone is easier with C4 since a good tank driver will rarely get killed by one engineer. However, to maximise your rockets potential, doing a 90 degree hit on the rear of the tank is the most effective way to kill it and the RPG is the one doing the most damage according to what I read.
Also, repair tools work wonders if you can sneak up on the tank, but that usually ends up in a suicide when the tank blows up (in BF3 you could survive with less than 10 HP, but in BF4 even if I stay at maximum Repair tool range, I still die).
Sources not linked before:
http://forum.symthic.com/battlefield-4-technical-discussion/5689-bf4-engineer-launcher-stats/
EDIT: Added mines,also, a guy took the time for 3 of the launchers: http://www.reddit.com/r/battlefield_4/comments/1q39oy/rocket_damage_to_vehicles/
EDIT: RPG vs SMAW analysis