You guys are making some nice posts. Good Job!
As far as base damage, a server that Hippi and I were mods on at the time had a 'base destruction day" as they were going to wipe the database afterward. The admins spawned some vehicles and aircraft and everybody got to attack their bases. What I discovered, is that cinder is pretty darn tough. It took an average of four Merlin crashes into the same wall panel to destroy it. Metal floors take a little less to destroy. I also discovered that the C130, although huge, isn't any more destructive in a crash than a larger heli.
Practically every object in the game can be destroyed. Base structures, map buildings and most other objects have a set amount of hit points that vary , but the health of the object is displayed in percent . 100% being full health and 0% being destroyed. Difference being that map structures respawn on reset and player built objects and vehicles do not. Most larger structures and vehicles in the game have two or three stages of appearance according to their health. Smaller structures and player bases only have two states, fully built and fully destroyed, and will keep their fully built form and integrity until their health reaches zero. Almost anything you do to a wall or building takes away health, but the damage may be very slight according to the weapon's power. You
can eventually shoot a cinder wall or a house down with a makarov but it would take a very long time.
Also be aware that even though a base wall or floor might stop a heli from crashing through, vehicles and objects inside the base can still be damaged . Hippi shot down a heli that crashed into our base once. Even though the roof remained intact, two helis parked on the roof and, five vehicles inside were destroyed. Her personal best to date I think.