@AEGIS you have a few options, you can use a winch like the ones used in https://www.simpleplanes.com/a/56aL9q/Modern-Torpedoes-Pack, but they need to be started up, you need to increase their max range a LOT as well as their speed, just to make sure the winches don't break while in use, you will need to start them up a while before launching the missile. Another option is adding a cockpit(NOT MAIN), this will allow complete independent control if done right. For control, gyroscopes will force your missile to maintain a perfect nose up orientation, but you can use this to your advantage by using rotators to rotate the missile around the gyroscope., to make sure your missile stays in the air while it is flying, you need to add massive wings, you can make these weightless then scale them down, make sure that the wings are symmetrical airfoils, otherwise your missile will want to fly into oblivion and crash your game(had to learn that the hard way).

@Novaxomix well I want the missile to be controllable like a plane, rather than a tracking missile. It has multiple stages and multiple warheads made out of bombs and fuselages so a cleaver engine isn't ideal as it will just immediately turn sideways and track towards the target and it can only hit targets that are within visual range.

just put the engine as a cleaver missile then add a function to the missile called waterproof, and set it to true, if you need more info just reply, i will check daily.

No, do you want the file to see what I mean?

did you put a missile?
if yes, then uhh... You need to change that.