Several Nautilus submarines from 20,000 Leagues Under the Sea, each painted a different colour.
UPDATE: I've made the tail a bit thicker so you can print at smaller scales.
Using Blender I modelled these from an image I found on the Internet.
There are two halves and a stand.
For the Nautilus submarine itself, I usually print each half separately then glue them together.
I scaled the stl by 2000% before printing these samples and I am using PLA with a Replicator 2.
There is a slight amount of warping so you have to hold or clamp the two pieces fairly tight at both ends until the glue sets.
I use super glue (it's the only adhesive I've found that really works with PLA), so you need to align really carefully then commitÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂ¢ÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂÃÂ¦
Again, I have no alignment tabs of any kind in the models - sorry.
It's easy to paint them after gluing.
Finally, the windows are Wiggle Eyes from any craft store that were painted then glued on.
I could have printed them but you just can't get the finish or resolution that I want on 3D printers (yet).
Oh, make sure you rotate the model so the flat side is on the build plate.
You will need to print the stand twice.