A fairly detailed model of an Airbus a320 twin-engine airplane. I believe I did it to a particular scale, but I don't remember what it was!
You will need supports for the wing fairings when printing the wings. No fills needed for the body. I printed it with three shells.
There are alignment holes for the two body parts. I used small pieces of 3mm filament. A piece of a bamboo skewer would work as well! The engine cowling has to be glued to the engine before attaching it to the engine mount. Note that the engines are slightly asymmetrical when gluing it together. Also the landing gears are M3x20 bolts.