Airwolf 3D Catapult

by airwolf3d, published

Airwolf 3D Catapult by airwolf3d Oct 17, 2012
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18234Views 2375Downloads Found in Mechanical Toys


Functional catapult

Here is a rendition of a truck/catapult combo.

The idea started when we bought a wooden toy from the hardware store that had to be glued and hammered together.

From scratch, we created the following design-enjoy!

You can read more about it at http://airwolf3d.com/blog/2012/10/16/download-and-3d-print-our-functioning-catapult/


Slice the stl file with your favorite slicer-we run one outer perimeters at 100mm/s and use 35% fill with Slic3r.

Note:  No support is necessary if you have decent bridging ability.  

  • After the part is printed, use an exacto to trim as necessary.
  • To clean up the holes (and make assembly easier), use appropriately sized drill bits.
  • Thread 1 M4x25mm bolt through the catapult base (optional opening for M4 nut on the opposite side included).
  • Then thread 4 M3x10mm bolts through the wheels and into the corresponding holes in the frame.
  • Attach a rubber band around the catapult and bumper and you are good to go!

Be careful not to hurt yourself or anybody else - this a tough design that can launch items up to 20 feet!

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Printed out great. All the parts in one printing is a great way to go.

How did you construct the pins for the wheel axles?

I hope my crandchild will play with it as long as it has printed (8 hours and 64 meters of filament). Very nice thing!

only the arm needs 100% infill

split the model in any modeling software and print the chassis and wheels with ~15%

save a lot of plastic

This is the type of stuff I love seeing on Thingiverse! Well done!