喷气发动机（全面重新设计）组件

Summary

The source design is beautiful but does not work – see my detailed comment on the source design page. Here are my remixed files I used to successfully build this with added assembly instructions. I did find that the scaling of some of the original parts was off and required scaling adjustment (10%) in the slicer prior to printing – some of these parts may have the same issue but can be scaled without issue. I take no ownership of the source design and make no promises to update these files with further changes, but will do my best to answer any questions.
Updated files:
• Front stator – remixed to fix screw holes to use M3 self tapping screws, added a countersunk hole on the back to accept a bearing to support the fan, and trimmed the end of the OD so it should fit in the cowling with little/no trimming.
• Rear stator – remixed to fix screw holes to use M3 self tapping screws
• Cowling – remixed to be a single piece, added chevrons to trailing edge
• Fan – remixed to replace the rear bearing with a lock ring
• Front Turbine Center – remixed to fix screw holes to use M3 self tapping screws
• Rear Turbine Core – remixed to replace the front bearing with a lock ring
Assembly instructions:

1. Install bearing into rear stator
2. Install bearing into rear of Rear Turbine Core
3. Install LPT blades onto Rear Turbine Core using super glue
   a. Prior to using glue, I recommend test fitting the blade rings onto the Rear Turbine Core and spinning the spool on a shaft to make sure that the blade rings fit correctly and don’t wobble
4. Install one lock ring onto 8mm shaft so that it sits 90mm from the end of the shaft
5. Install Rear Turbine Core onto lock ring by inserting the end of the shaft with the lock ring into the FWD end of the Rear Turbine Core and pressing lock ring into the FWD end of the rear turbine core. There should be ~35mm of shaft protruding through the bearing on the AFT end of the Rear Turbine Core.
6. Install bearing into rear stator
7. Install shims onto shaft on AFT side of Rear Turbine Core. I found 1.3mm total shim thickness to be the correct thickness to set the gap between the LPT blades and stators.
8. Insert shaft through FWD side of rear stator. There should be just enough shaft protruding through the bearing on the rear of the frame to install a lock ring.
9. Install lock ring onto shaft protruding from bearing on rear stator. No shims needed here
10. Install shims onto FWD end of Rear Turbine Core. I found 1.2mm total shim thickness between the Rear Turbine Core and the center turbine to set the compressor blade to stator gap correctly.
11. Install bearing to AFT end of front turbine center
12. Install bearing to FWD end of front turbine core
13. Install compressor blades to front turbine core using a small amount of super glue.
    a. Prior to using glue, I recommend test fitting the blade rings onto the front turbine core and spinning the core on a shaft to make sure that the blade rings fit correctly and don’t wobble
14. Install front turbine to front turbine center using M3 screws and washers
15. Install front stators between compressor blades by pressing them onto the spool
16. Install fuel injector plate to combustion chamber body
17. Install combustion chamber assembly onto front turbine core
18. Install front turbine assembly (front turbine core with blades, front stators, combustion chamber assembly, front turbine center) into turbine body. The front stators should snap into the grooves, and the rotating parts should be captured inside the turbine body loosely. Do not glue stators in at this time.
19. Install the stage 1 LPT stator into groove in the turbine body just behind the front turbine center – do not use glue at this time.
20. Install LPT stators 2-4 between blades on Rear Turbine Core.
21. Install turbine assembly onto shaft by inserting shaft into the aft end of the center turbine and sliding the assembly down until it sits against the shims on the FWD side of the Rear Turbine Core. As the AFT end of the turbine body gets close to meeting the rear stator, you may need to slightly expand the gap so that the LPT stators can snap into their grooves. Secure the turbine body to the rear stator with 2 screws.
22. Install bearing to front stator
23. Install front stator onto turbine body assembly with two screws. Gently slide all rotating parts as far AFT on the shaft as possible. At this point, verify that the rotating parts spin freely and do not rub on the stators. If there is rubbing, disassemble and adjust shim thickness as needed.
24. If there is no rubbing and all parts spin freely, remove the front stator.
25. Install shims as needed on the FWD end of the front turbine core so that there is almost no gap between the front turbine core and the front stator, but ensure the shims are not compressed when the front stator is installed. I found 1.3mm total shim thickness to be correct.
26. After setting shim thickness, install front stator to turbine body assembly with all 5 screws
27. Install remaining 3 screws to secure turbine body assembly to rear stator
28. Verify all parts still spin freely. At this point, you can rotate stator sections and combustion chamber assembly slightly out of their grooves and add a small drop of glue before rotating them back into place.
29. Install fuel injectors
30. Installing the completed engine core into the cowling is very difficult. You have to roll the core into the cowling so that the OD of the front and rear stators sit in their grooves in the cowling, then try to spread the cowling as you rotate the core further into place. I found that using a spreader clamp was very helpful to gently spread the cowling and make spinning the core into the cowling grooves easier.
31. Once the engine core is installed in the cowling, install a lock ring on the shaft protruding through the front stator. No shims are needed here, but leave a small gap to prevent rubbing.
32. Install bearing in front of fan
33. Install fan onto shaft, press onto lock ring.
34. Test spin the fan. It should be rotationally locked to the LPT, and the compressor/front turbine assembly should spin freely on the shaft.