Boeing 737-800 scale model airplane
Instruction
This is a tiny little scale model of the Boeing 737-800 passenger jet. The cover model was made from 1/16" MDF board. It could very easily be made to work in 1/8 MDF or plywood simply by doubling the scale.
Other models in this series drawn to the same scale:
Airbus A-320
https://www.designfind.com/project/42869
Boeing 777-300
https://www.designfind.com/project/43676
In order to print the reverse sides accurately, it is very helpful to make a jig from some sheet of scrap that will help you relocate your position. This is as simple as a right-angle held to your base with tape or magnets. Cut it on your laser to get a precise X/Y to butt your stock up against.
There are two card images, a front and a back. Set the Green and Black layers to ignore for this step, and set Blue to Score, and Red and Yellow to Cut. Process the material.
Without moving the original sheet at all, pull out the card and put it back in place upside down. You will use this to preceisely locate the parts that get scored on the opposite side. You can remove any parts that do not get scored again and set them aside.
Set the Blue, Red and Yellow layers to Ignore, and place the Green/Black card directly on top of the previous image. (Make sure you group the Greeen/Black object together first so you don't accidently shift something or leave a bit behind.)
Enable the Snapping feature to have to computer help you get them precisely and exactly overlapped. Zoom right in and double check.
If you've done all these steps carefully, the image on the reverse side should be perfectly registered. Keep the Black layer on Ignore, and Score the Green layer.
Glue the wing and cabin sides to the central part with a sparing amount of white glue. Note that the wing (and tail) has a couple of extra score lines on one side only. This side faces down.
The wings of a real jetliner are angled up at the tips. This is called anhedral, and has an important role in making the plane more stable in flight. You can improve the looks of your model with very little extra effort by bending-in some anhedral to your wings instead of leaving them a flat sheet.
The extra scored lines on the bottom side of the wing are there to act as a hinge point. You may wish to use a pair of flat pliers to help you gently bend the wings up at a slight angle. Be careful, and you should have no problem bending without breaking your material. If the bend is really stubborn, run an X-acto blade along the score to deepen the cut a bit and try again.
If the bend won't stay bent, you can rub a little glue into the crack. Once it's dried, you'll be good to go.
Glue the turbofans onto the front of the engine nacelles. Note that they are sort of a squashed, rounded triangle shape. The flat side goes to the bottom.
The winglets should be glued at a flared angle. Look at some pictures for reference.
Add the tail surfaces, and you're done. Clear skies, captain!