@Sockdragger before I finish reading this, it says fixed

@Supersoli8
Ok....
(Step 0, before trying to open the doors, consider adding three long-legged retractable landing gear legs to the plane: one in the front and two under the wings. Opening the bomb bay will be a lot easier to watch if the bomb bay doors have some space to rotate.)
Step1: take a standard square block and a hinge rotator. Turn the rotator until the main body is up and the tip is down. Then move it over the block. If it hasn't connected by itself, open the connections tab and connect the lower arrow of the rotator to the top arrow of the block. Start your plane on any airfield. The block should now be visible with the rotator sticking out. If you move VTOL, the rotator should rotate forward and back.
Step 2: move the rotator with block to the bottom of your plane. If the rotator doesn't connect by itself, open the Attachment Editor tab and 'add a connection': connect the top arrow of the rotator to the bottom or side of your fuselage block. Run again and check if now the rotator moves through block.

If it doesn't, again open the connections tab and make sure the block is connected only to the rotator. If this doesn't help, delete ann connections on the rotator and once again connect the top arrow of the rotator to the fuselage and the bottom arrow to the dock

Step 3:scale the rotator block to 0.5,1,0.2 and use the placement tool to move it to the place you want to connect the bomb bay doors. Again go to the airfield and again test if the block still rotates. If it doesn't, check the connections again.
Step 4: now delete all connections of the block, then delete the block. Instead move one of your bomb bay pieces to the location and snap it into place. Then delete all connections and reconnect it to the hinge rotator only.
Important hollow fuselages have a strange way of connecting. You deliberately have to connect the bottom arrow of the rotator to the side arrow of the hollow fuselage piece. You might have to try a couple of times to get this right. Go to the runway and test the bomb bay opening. If you got it right, it should work without problems. If it doesn't, go back to the construction screen and check the connections of the bomb bay pieces. It should be connected only to the rotator. If this still doesn't help, delete this connection also and reconnect again, making sure you connect the bottom arrow of the hinge rotator to the side arrow of the hollow fuselage bomb bay door piece. Go to the airfield aga

@Sockdragger when I try it didn’t work

I actually don't see a problem there. The rotators work fine as long as you connect them to the SIDES of the hollow pieces. You just have to think of the pieces of hollow blocks you use for the bomb bay as actual blocks and connect the rotators likewise.
Here I connect the bottom to the bay door

@WinsWings np

thanks for joining

I just finished my first ever internal weapon bay so if you want to check it out its on my submission to winswings challenge

@BOSSentinel thx

@Sockdragger I did attach a rotator

So what is the problem with the bomb bay? I see you haven't added any rotators, hinge rotators or even pistons. So do you want it to rotate in, out, slide forward, slide down? And what is the problem so far other than that you haven't started yet?

@Supersoli8 I got u tomorrow frfr

First reaction, has nothing to do with the bay doors but... You are using a flight computer. In order for it to work properly, all 4 of its tabs must be facing downwards. If not, it messea up your Chase View. I know,.SimplePlanes doesn't document this properly, but it's basically a flat cockpit. If you mount it against to wall, it's the same as a cockpit pointing upwards

@Planezandstuff huh? What did you say?