Thingiverse
Groucho Duke's 29mm high power rocket launch tower for 4-fin rockets
by Thingiverse
Last crawled date: 4 years, 3 months ago
WORK IN PROGRESS! This is a quick remake of my 3-fin 29mm launch tower bracket for 4-fin rockets. I haven't launched a rocket with this design, so if you try this please share how it works.
This is a 3d printed end support for a launch tower for 29mm high power rockets. You can see a video of my first 29mm min-diameter rocket CTI I224 launch on my original 3-fin version of this here: https://www.youtube.com/watch?v=Np2yk-4uS3s
Bill of materials:
Approx 1kg of PETG or similar filament. This is what I used: https://amzn.to/2QAysme
6x #10 1-14" machine screws
12x #10 washers
6x #10 lock nuts
8x 1/4-20 x 4" lag bolts
1x 1010 launch rail
3x aluminum extruded L angle (1/16" thick with 3/4 and 1/2" sides) - http://bit.ly/16thALAngle
4x 3/4" EMT conduit
Adhesive backed Teflon tape. Here's what I used: https://amzn.to/2QCmWqP
Contruction:
Print 2 of the parts (takes approx 15-30 hours each plus about 0.4kg of filament)
Sand/file/buff/machine the EMT conduit to remove any bumps that would damage your rocket
Test fit the 3d printed parts on the 1010 rail, EMT conduit & extruded L
Trim extruded L and/or EMT conduit to fit. Deburr the ends so they'll slide onto the 3d printed parts (For the 4' extruded L I used, trimming the EMT conduit to 44-3/16" worked well.)
Sand/file/adjust the 3d printed parts as required
Slide both 3d printed parts on the 1010 rail
Screw the 1/4" lag bolts into place in the holes where the EMT conduit mounts
Tape one side of each EMT conduit with the PFTE/Teflon adhesive tape.
Support one end of the EMT conduit with something to keep them level and slide into one of the 3d printed parts. Make sure the Teflon tape faces where the rocket will go. I used some car washing sponges to prop up the EMT. Repeat for all 3 EMT conduit pieces.
Slide the other 3d printed part and EMT conduit into place. Depending on the fit, this may take some force. Use extreme caution not to damage your 3d printed parts when assembling the tower. If you damage your 3d printed parts, throw them away and print new ones. Do not use damaged parts in your rocket launch tower!
Once all three EMT conduit pieces are in place, slide the extruded L pieces into place. Drill 3/16" holes through the L using the holes in the 3d printed parts to guide you.
Use #10 machine screws, washers & nuts to attach the L pieces to the 3d printed parts.
Test fit your rockets, inspect, & go fly!
This is a 3d printed end support for a launch tower for 29mm high power rockets. You can see a video of my first 29mm min-diameter rocket CTI I224 launch on my original 3-fin version of this here: https://www.youtube.com/watch?v=Np2yk-4uS3s
Bill of materials:
Approx 1kg of PETG or similar filament. This is what I used: https://amzn.to/2QAysme
6x #10 1-14" machine screws
12x #10 washers
6x #10 lock nuts
8x 1/4-20 x 4" lag bolts
1x 1010 launch rail
3x aluminum extruded L angle (1/16" thick with 3/4 and 1/2" sides) - http://bit.ly/16thALAngle
4x 3/4" EMT conduit
Adhesive backed Teflon tape. Here's what I used: https://amzn.to/2QCmWqP
Contruction:
Print 2 of the parts (takes approx 15-30 hours each plus about 0.4kg of filament)
Sand/file/buff/machine the EMT conduit to remove any bumps that would damage your rocket
Test fit the 3d printed parts on the 1010 rail, EMT conduit & extruded L
Trim extruded L and/or EMT conduit to fit. Deburr the ends so they'll slide onto the 3d printed parts (For the 4' extruded L I used, trimming the EMT conduit to 44-3/16" worked well.)
Sand/file/adjust the 3d printed parts as required
Slide both 3d printed parts on the 1010 rail
Screw the 1/4" lag bolts into place in the holes where the EMT conduit mounts
Tape one side of each EMT conduit with the PFTE/Teflon adhesive tape.
Support one end of the EMT conduit with something to keep them level and slide into one of the 3d printed parts. Make sure the Teflon tape faces where the rocket will go. I used some car washing sponges to prop up the EMT. Repeat for all 3 EMT conduit pieces.
Slide the other 3d printed part and EMT conduit into place. Depending on the fit, this may take some force. Use extreme caution not to damage your 3d printed parts when assembling the tower. If you damage your 3d printed parts, throw them away and print new ones. Do not use damaged parts in your rocket launch tower!
Once all three EMT conduit pieces are in place, slide the extruded L pieces into place. Drill 3/16" holes through the L using the holes in the 3d printed parts to guide you.
Use #10 machine screws, washers & nuts to attach the L pieces to the 3d printed parts.
Test fit your rockets, inspect, & go fly!
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