ObjectTemplate.CriticalDamage

MDT description

Some vehicles stop moving and take damage by themselves when heavily damaged. The idea is that if a vehicle is nearly destroyed, it is probably on fire and will soon be fully destroyed on its own. The relevant values in the object's Objects.con file are:

 ObjectTemplate.CriticalDamage 12
 ObjectTemplate.HpLostWhileCriticalDamage 1.5

The CriticalDamage value is the number of hitpoints at or below which the object starts to self-destruct. This is usually about 10-20% of the Maxhitpoints, though can vary on up to 50%. The HpLostWhileCriticalDamage value gives how many hitpoints are lost per second when in the critical zone.

Reaching critical damage will also disable any engines that are attached to the object.

See the Damage Tutorial for more information.

Source and more details