Groucho Duke's 29mm high power rocket launch tower

thingiverse

This is a 3D printed end support for a launch tower designed specifically for 29mm high power rockets. This project is still in development stages but I've successfully tested it with minimum diameter 29mm rockets and CTI I224 motors without any signs of wear or damage. All components work perfectly. You can watch my first 29mm min-diameter rocket CTI I224 launch here: https://www.youtube.com/watch?v=Np2yk-4uS3s Update (2019-06-02) - V2 uploaded with more space between EMT tubing and outer support structure. It also features a slightly enlarged 1010 launch rail square hole for easier mounting and unmounting. Here's the list of materials needed: Approximately 1kg of PETG or similar filament is required, which I used from this source: http://amzn.to/2y7Z0zs Additionally, you'll need: * 4x #10 1-14" machine screws * 8x #10 washers * 4x #10 lock nuts * 6x 1/4-20 x 4" lag bolts * 1x 1010 launch rail * 2x aluminum extruded L angle (1/16" thick with 3/4 and 1/2" sides) - available here: http://bit.ly/16thALAngle * 3x 3/4" EMT conduit * Adhesive backed Teflon tape, which I used from this source: http://amzn.to/2wn9Hlc Here's a step-by-step guide to constructing the launch tower: 1. Print two of the parts, which will take approximately 15-30 hours each and require around 0.4kg of filament. 2. Sand, file, buff or machine the EMT conduit to remove any bumps that could damage your rocket. 3. Test fit the 3D printed parts on the 1010 rail, EMT conduit and extruded L. 4. Trim the extruded L and/or EMT conduit to fit, deburr the ends so they'll slide onto the 3D printed parts. 5. Sand, file or adjust the 3D printed parts as required. 6. Slide both 3D printed parts on the 1010 rail. 7. Screw the 1/4" lag bolts into place in the holes where the EMT conduit mounts. 8. Tape one side of each EMT conduit with the PFTE/Teflon adhesive tape. 9. Support one end of the EMT conduit with something to keep them level and slide into one of the 3D printed parts, making sure the Teflon tape faces where the rocket will go. 10. Repeat for all three EMT conduit pieces. 11. Slide the other 3D printed part and EMT conduit into place, using caution not to damage your 3D printed parts when assembling the tower. 12. Once all three EMT conduit pieces are in place, slide the extruded L pieces into place. 13. Drill 3/16" holes through the L using the holes in the 3D printed parts to guide you. 14. Use #10 machine screws, washers and nuts to attach the L pieces to the 3D printed parts. 15. Test fit your rockets, inspect, and go fly!