my current fortress is encircled by a solid wall, broken by a single gap with a retracting bridge that opens onto a deep hole. my goal with this fortress was to never develop a military, and to seal up the fortress from the outside world entirely after the second year. however, I got bored with that pretty quickly, and decided that I needed some offensive power to stave off the tedium of an invulnerable fort.
to that end, I set traps and caught/trained elephants and proceeded to build a drop hangar for them. however, I've run into a few problems, and I'm hoping someone can either help me out or dash these aspirations completely so I can move on to some other project.
problem 1) herding the elephants onto the launch pad is proving to be a logistics nightmare. I have an idea to remedy this particular problem, in which I completely wall off the launch pad save for one door, and draft my animal trainer into his own militia squad. I station the trainer inside this room, where the elephants will follow him; set the door to not let pets pass, cancel the trainer's order so he leaves, mark the door as forbidden, and pull the lever.
problem 2) I'm using a retracting bridge as the floor of my hangar, but I think I'm hitting a weight issue because the bridge doesn't retract while elephants are standing on it.
I remember seeing a thread like this that used dwarves instead of elephants, which I imagine would be considerably easier, but then there's the problem of getting the dwarves back inside without compromising the security of the fort (granted, when the enemies are dead, the fort is already secure, but I'm trying to leave as few holes as possible).
anyway, anyone have any experience with this, or suggestions on how I should move forward?