Basically every ship, or plane is made up of different individual building blocks if you will, or "zones". Engineroom, cargo hold, wing, cockpit, etc. The hitpoints for the planes components aren't supposed to be any singular sum, but just individual pieces of it. (locational damage if you will) By adjusting the hitpoints on these pieces you can dictate how easy or hard a component on a ship or plane is to destroy, and/or add some really cool special effects. You can even effect how fast or slow ships sink, or how much boyancy a ship compartment gives. Overall a pretty powerful file, do give it a look
