Resized 60% jet engine HPC spool to fix clearence problems

thingiverse

This part fits the 60% jet engine version that you can find here: https://www.thingiverse.com/thing:3432558 This hpc spool is ment to be used by people who have clearance problems with the hpc, its rotors and stators. I edited the 60% hpc spool file and resized its middle part width down to 57% in order for it to have more clearance from the stators and to take smaller rotors that are printed at 58% to avoid rotors touching the hpc case. the length of this part is untouched the bearing hole is untouched. so you can use the same 10x22x6mm (61900) bearing that you originally used for the 60% version of the engine. the bearing fits very tightly, in my case it needed a bit hammering. but it fits without issues To use this part you need to print the hpc rotors at 58% size. the rotors at 58% snap fit tightly so you can avoid gluing them. Stage 4 and stage 5 rotors printed at 58% size are quite small and it seems that they cant be pulled over the lower part of the hpc spool (the one with the screw holes) but if you try to pass them over with an angle (diagonally) and a little bit of force, they will indeed pass without any problems. Using this resized spool, you will fix issues with the spool touching the stators and rotors touching the hpc case.. if your rotors touch your stators you may need to reprint the stators decreasing Z height or sand them down a bit. you can also try to sand the rotors if you need more clearance. If you plan to spin the engine fast you need to make sure that none of the rotating printed parts touch with stationary parts, or your engine will start melting and fail spectacularly while spinning.