Nice job. At first I thought the idea is a bit weird, as that kind of weapon is more something for, well, planetary combats, where you have no z-axis - like, you could simply roll your cap to have the things heading direclty at the enemy with an even longer range. However, the way they are, they hit the enemy with an interesting delay. You could send out the first barrage, then roll your ship to give it a broadside with directly aiming rockets. If the capital ship rolls fast enough, you could also have the first strike coming from above and the second from below. Would be crucial in bigger capital fights.
