I did some research yesterday on the tanks, I've tried it for all three tanks (T-90/M1A2/Forgot China's tank name).
Front: About 1/4 of the tank's health
Upper back: About 1/4 again.
Lower back: About 1/3 of the tank's health
Mounted Turret: About 1/3 of the tank's health
The circular things inside the chain/wheel tract things: About 1/3 of the tank's health
The chain/wheel tract things: 1/2 of the tank's health.
2 anti tank missiles to the chain destroys the tank. Otherwise it's usually 3-4 missiles to destroy a tank. Note: You can hit the chain side on as well but it's 100 times harder 'cause you only have a thin strip to aim at. It's also hard to hit the chain front on if you are far away.
Also, the locked on symbol and sound are triggered in a tank even if you just aim the anti tank at it without shooting.
OK that was it!
Front: About 1/4 of the tank's health
Upper back: About 1/4 again.
Lower back: About 1/3 of the tank's health
Mounted Turret: About 1/3 of the tank's health
The circular things inside the chain/wheel tract things: About 1/3 of the tank's health
The chain/wheel tract things: 1/2 of the tank's health.
2 anti tank missiles to the chain destroys the tank. Otherwise it's usually 3-4 missiles to destroy a tank. Note: You can hit the chain side on as well but it's 100 times harder 'cause you only have a thin strip to aim at. It's also hard to hit the chain front on if you are far away.
Also, the locked on symbol and sound are triggered in a tank even if you just aim the anti tank at it without shooting.
OK that was it!