How to Make a Desktop Catapult





Introduction: How to Make a Desktop Catapult

Here is a simple DIY desktop catapult you can make with just a few hours and some easy-to-get materials. In the video I used mortise and tenon joinery but you can get good results with just glue and brad nails.

Step 1: Making the Catapult


  • Table or Hand Saw
  • Drill


  • Oak or other hard wood
  • Rubber Band
  • Short Twine or small rope
  • Metal Latch release or gate release
  • 3/16” metal rod
  • 3/8” metal rod or 3/8” oak dowel

Cut List

  • Base – 5 x 1 3/8 x 8 ½” Oak, mahogany or laminate any wood together
  • Boom, Catapult Arm – 12 x ¾ x ¾”, you could also go ½” square for a smaller machine
  • 2 Long Post – 5 ¾ x ¾ x ¾”
  • 2 Short Angle 3 x ¾ x ¾”
  • 2 Long Angle 5 ¾ x ¾ x ¾”


Cut the 2 long posts square and glue to the base, use some screws or brad nails to secure. Cut the 2 long angles and 2 short angles at 45 degrees and attach to the long posts on the base. Use brad nails or screws with glue for the best result. You can always add additional support if needed.

For the rubber band, just use a common office version and for the cup either buy a thick piece of lumber or laminate thinner pieces together. Drill out a 1 ½” bowl and screw to the boom/arm.

Step 2: Conclusion

For a more in depth look, check out the video that goes over all of the steps to make this desktop catapult!



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