Water balloon ballista

[mechanicalbrain]

Originally Posted by Ryan M.

I'm afraid of the cables streching, so I'm hoping to change it to make the lines holding the cup the part which actually provide the force, which should mostly circumvent that problem. Any recommendations on preventing the cables from streching?

Thanks to everyone so far.

Have you actually tested to see if your cable is stretching? I what you are using is having trouble staying taught then maybe a tighter weave. I can't think of the material but lassos (the real ones) are like cable when it comes to bending....

[wingnut1705]

You might want to try a simple catapult. For my Boy Scout troop I built a two foot tall catapult that launched a bean bag around 150 feet. I utilized two rat traps and several rubber bands. It worked really well.