Need Advice with a simple Physics flight I am trying to setup

RED MESH = JET ENGINES
BLUE MESH = SHIP HULL

I have attached physics thruster’s directly to the red mesh, I can control its pitch rotation with my game pad axis.
But every time tick the simulate Physics box for these meshes it all falls apart on launch and wont stay in place like in the bluprint.

In game using various settings the meshes collide until they fall on the floor or they ignore each other and I can fly the jet engine part away.

Unreal Engine Demo 02.13.2017 - 22.16.01.01.png

I edited the post and made the question MORE direct.
help if you can.

You’ll need to add a Physics Constraint to attach a thruster to the hull

Maybe ‘fake’ the thrusters more so that they are not really pushing themselves? Just use the directions and positions to calculate velocities for your root level?

Unfortunately I have tried all kinds of combinations under collisions and physics in the detail panel of the 2 meshes.
I want them to simulate physics but not with each other.

I already have a models like this that I hijacked from the flight example and the UFO one.
Im trying to have a different option one for seeing if it works well as a flight option, and the other as a option to the player as a simulation hardcore flight option.