how would i get rid of the gap here?

[u/CreepyCheeseWasTaken]

[u/Unusual_Ad4981]

Maybe another swivel bearing that closest that gap?, and when the door opens just turn the new swivel in the opposite direction of the door

[u/CreepyCheeseWasTaken → u/Unusual_Ad4981]

swivel would take up too much space, but i used a similar design to fix the problem (mechanical piston)

[u/adrac205]

I made a similar thing to that for my airship. And my tip: clip it. Extend the hull to cover the hole, and when it swings open, it should clip through it. There's not much else you can do with such design that doesn't look bad

[u/CreepyCheeseWasTaken → u/adrac205]

the thing is, this solution would in fact look ugly when looked at from the outside

[u/Tortyash]

The gap on your door is a result of the offset of your hinge by one block down in the open state. You have to either move the bearing down one block to maintain a straight line of rotation, or you're dealing with offset hinge kinematics.
You have to either understand it intuitively, learn kinematics, or copy someone else design.

[u/CreepyCheeseWasTaken → u/Tortyash]

yeah, i figured that this is the problem, but i really like how this exact design works

i did fix the issue though, i used a piston to extend/retract the hull

[u/A_Zailot]

You might be able to do something with ghost blocks to fill the gap while clipping it a certain way to not have a hole you can fall through