Attach and actor to an actor using a 'rope' or similar.

[CrazyCatDev]

@BoredEngineer;450665

For vertical movement you need to unlock limit in Z axis (assuming that constraint Z is Up vector). For removing pendulum effect you could dynamically change limits of constraint - slowly limiting ball constraint to swing in smaller and smaller radius, or you should be dropping helicopter speed in advance before stopping completely.
But if this is for RTS, do you really want to have physics for such features?

@BoredEngineer;450693

Actually I meant to limit movement in z axis, by setting some lenght (maximum cable lenght) which it will be allow d to move. Because if you just set is as free it will fall down completely.

It’s a shame that there isn’t an option to limit to only one direction of the Z axis (say the UP vector of the Z axis). I played with changing it from unlocked to limited and setting a value for the limit, and that does give me a result I’m looking for when I drop the helicopter closer to the ground, but when I lift off the lifting effect isn’t immediate due to that limited value. I hope you understand what I mean. Maybe it should be something I could suggest to add to a future release?