Since A lot of people here seem Like good builders, Can u fix my plane or tell me whats wrong with it?

Thanks Everyone.

I had made a few planes that for some reason tend to be ''Stable'' without Verticals......... but i have no idea how they where stable

@lolvplol yes. They are not affected in any way by fuselage blocks

Okay. Thanks, one more thing. Do they work if they are inside the plane?

Welcome to SP by the way

You don't. You'll need to include a vertical stabilizer and then scale it down so it is virtually invisible, or you can experiment with gyros but that will be pain in the butt