1: Rocket Harpoon:
They launch rockets tethered your airship that will pull you until it hits something, just as explosive as a normal rockets. When they hit something they will explode and then reel back in.
2: Suspendium Rockets:
Think Kerbal with this one, essentially kamikaze/suicide ram ships. These are rockets that will explode multiple rooms, possible competition for the might of the imperial cannon.
They use experimental and volatile east/west suspendium crystals. The crystals are literally spinning horizontally. Someone thought, "What if I put a suspendium chamber sideways and put a ram on it?" Sadly this person's body was never found in the wreckage that ensued. Luckily we were able to recover the original plans for this Suspendium Rocket.
3: "Rocket on a Stick":
Basically a giant bottle rocket to propel you forward.
I'd say, simply, fly by wire rockets. really bad rate of fire and great range. also maybe fly by wire torpedoes! more damage and etc...
i'd give them a 50% chance to hit, and a 75% chances if there's a targetting computer on board.
Meh, the wire torpedoes idea is better than the first 3 ones. We don't need that many rockets.