So, I was making a CF-101B voodoo display for my grandfather and decided to make a J-57 turbojet engine (or something that approximates it) to go along with the airplane.
The goal was to make a simple turbojet that went together w2ithout using any screws - I was able to put this together with a small amount of glue. I did use 3 skateboard bearings - 608 bearings - if you'd like to keep it pure, there are several print in place 608 bearings here on Printables. - just search 608 and you will find several options.
This was the first jet engine to exceed 10,000 lbs of thrust. Variants of the Pratt and Whitney turbojet engine were used in the B-52, KC-135, F-100, F-101, F-102, F4D, F8U, A3D, and the Lockheed U-2 (as well as more). A commercial version was also used in the Boeing 707-120, the Boeing 720 and the DC-8-10.
The F-101 briefly held the world record for fastest plane while being powered by this turbojet.
I should say, I took some liberties in the combustion chamber and simplified some things. I omitted the stators from the high pressure section of the turbojet.
Please, see the PDF manual for instructions on how to put this together. I had so much fun making this. It was printed out with a 0.4mm nozzle and .2mm layer height. The combustion chamber did require supports, but everything else was printed without. I did find that using a brim was helpful - it is very important that the fans and stators are free of deformation, otherwise the fans won't spin freely and there will be a grinding noise.
J57 turbojet Engine and stand
by Randall Krall · original on Printables ↗
Learning / Engineering
♥ 869⬇ 1.9k🖨 13 prints
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Spacers - low pressure - 8th fan to middle bearing spacer.stl
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