The Launcher Is Available!

TB crossbowThe launcher is now available as a reward on Kickstarter!

This puppy is a cross between a slingshot and a crossbow, and can launch almost anything that’s about the size of a tennis ball.

Other features include:

  • A stop that keeps the ammo in place until it is launched.
  • Safety bolt that can be set to engage upon cocking.
  • Adjustable length frame to allow for adjustment of launcher power.
  • Interchangeable parts that allow for the attachment of a butt stock.
  • A sturdy cup made out of recycled bicycle tire.

TBC cockedI’m quite proud of the internal mechanism of this thing.  Getting the stop and the safety to work correctly took quite a bit of tweaking, but I think I’ve got a design that will work beautifully.

As you can see in this side view, when the cup is pulled back the U bolt engages with the rotating catch.  When the trigger rotates to engage the catch it also pulls the stop up to hold the ammunition in the cup.

TBC fired

When the trigger is pulled the catch is allowed to rotate forward releasing the cup.  At the same time the stop rotates down and out of the way.

In the first side view you can also see the safety bolt resting in the channel in front of the cup.  In this position the stop cannot fully retract, preventing the trigger from being completely pulled.  Only once the safety bolt is moved to the position shown in the second side view can the launcher be fired.

I really wanted to wait until I could show how it works with a video, but at this point I’m running out of time before the end of the project.

With the $5,000 in matching funds that should hit my Kickstarter project today, we only need to raise another $2,500 over the next 11 days!  Head on over and check it out!

What do you think of the launcher?  How’s the size?  Are there other features you’d like it to have?  Let me know in the comments!

  1. Ellen Bierhorst says:


  2. I just can’t wait to build this with my own Kikori – I think (hope?) an up-down adjustable wooden telescopic sight will make it even more fun :-)

    My best regards, Kasper

  1. […] warns that his slingshot gun is not meant to be played with by actual children — just engineering devotees who wish they […]