Version 2 is here- http://www.thingiverse.com/thing:1698321. It is easier and faster to print.
This is a beautifully detailed Low Pressure Steam Turbine Rotor. The STL files are in 1:18 scale and includes as much detail found on a real machine as possible. Certain parts have been modified for easier 3D printing, but this has been minimized as much as possible even if it made the model more complicated to print or assemble.
This model is designed to be assembled with glue. All parts except LP_bore_plug, 20T_blade, and 20G_blade should be glued together. Superglue + clamping for 10 minutes worked well for me.
LP_bore_plug is designed to be removable with a slight friction fit.
20T and G blades are secured in place with a T-slot groove. The assembly was designed to fit 58 blades but I was only able to insert 55. Don't glue these in place because you may need to replace broken blades at some point in the future.
In the assembly drawing, parts which are used in more than one location are labeled only once.
See http://www.thingiverse.com/thing:1676760 for the rotor stand.
See http://www.thingiverse.com/thing:1666208 for the lifting beam.
Edit 7/31/2016: Added 20T_blade_r4 and 20G_blade_r4. These are the same as the r3 blades but have support materials built-in. Print in the upright position with 10-15 lines of brim. Or print using the tree.
At 1:18 scale, total filament used was about 730g and took roughly 52 hours of print time on my machine.
Parts have been oriented in the STL to the best printing orientation. All parts are at 1:18 scale with mm units.
1:18 scale is printable on a Rostock Max V2 with the stock 0.5mm nozzle with 0.2mm layers. Smaller scales probably will require a smaller nozzle size and/or layer height.
Most parts should be printed with automatic supports. The only part which required manual support tweaking for me was Generator_end_shaft.
Support material is basically required in the groove for 20T_and_20G_wheel. If you can remove support material using pliers from the 5mm x 5mm bridge test on the 5mm calibration steps http://www.thingiverse.com/thing:24238, you should have no problem removing the supports from the groove with needlenose pliers. Remaining material in the groove can be removed by running 20T_blade_r3 or 20G_blade_r3 around the groove forcefully using needlenose pliers.