This is the B-377 Stratocruiser (and military variants C-97/KC-97 Stratotanker).
It is contained in redundant file structures from .blend , .STL. .3MF and gcode for 1:120 scale PLA in pieces set up to fit on a standard 3D print stage (recommended PETG filament gives slightly better results compared to PLA)
3D display formats also included are obj/mtl, fbx and gbl. You may reslice for different sectioning of the model, different filament type or a different scale. Best guide is obviously to read your printer and or Slicer docs
A 3D display of the file is available to view and of the models for sale here at the portfolio page on my main Website (
https://medmatix.github.io/crunches-data2/portfolio.html).