I was aware that box launchers have a slow rate of fire, but this is something special...
It's a launcher on a fighter. Tried manually unloading & reloading the torpedos it fires. Clicked the 'reload para' button in the TG menu. Tagged the fighter's carrier as collier, etc. The last (and first) time these launchers were used, was like an ingame year ago - plenty of time for a hangar reload. But nope.
Update: The time to reload
increases over time... rip fighter-bombers concept.
More number weirdness:
Didn't check the ressource costs when placing a construction order. Within a week of production these consumed all of my uridium.