$5.00Jet Engine, Single-Spool with AfterBurner

myminifactory

This type of engine has been around for more than 50 years. But they're still used in many military fighter jets. A 3D model was designed and created to explain the different features compared to turbofan engines. The key features are: a single spool with over 10 stages long compressor rotor, half split casings, can-annular combustion chamber, and afterburner with variable nozzle. Here are the design points: for the rotation of the spool, only a dummy bearing method is used; all stator vanes were omitted to avoid rubbing between vanes and blades, but variable vane linkage images are included for reference; afterburner nozzles are complex to design, so only "open" and "close" position images are shown; some parts that require support for printing are prepared with STL files containing the word "ws". To aid understanding, a parts breakdown list and assembly order are provided. The downloadable files include: 39 STL files, images of parts breakdown for assembly assistance, and an Excel file (zip) containing the parts list. Purchase information includes aluminum tubes according to the parts list; screws with a diameter of M1.4x3.5L, approximately 30 each, which screw directly into a 1 mm hole without a nut; and screws with a diameter of M2 x **, as listed in the parts breakdown. Assembly requires standard skills like drilling, tapping, filing, tightening, painting, and gluing, along with patience. For tightening "Rotor Stop Screws", refer to the attached photo titled "Rotor Screws Tightening". Estimated total net print time: approximately 50 hours (calculated based on PLA material, 0.4 mm nozzle, 0.2 mm layer height, 40% infill, no raft or support). Note that actual print parameters may be adjusted according to experience. Optional parts include STL files for "Non-Shrouded Turbine Blades Rotor", along with photos and images to aid in removing special supports: "Comp-1017-Rotor901ws" (the original "Comp-1017-Rotor01ws").