[hw97karbine] has made a pretty cool tennis ball cannon. While making a cannon of this sort is nothing new to us, we were impressed by the effort taken to get a stoichiometrically ideal mixture of … ...

[hw97karbine] has made a pretty cool tennis ball cannon. While making a cannon of this sort is nothing new to us, we were impressed by the effort taken to get a stoichiometrically ideal mixture of ...

Now, a beer launching fridge I can understand, but a tennis ball cannon? I find it amusing when someone spends a tremendous amount of time and effort building something that can automate basic ...

The air was held in a reservoir and when the pressure reached 100 PSI, a modified irrigation valve was triggered to launch a tennis ball that had been stuffed down the barrel. The cannon was ...

Build a tennis ball cannon from old soup cans. MAGA divided as Trump turns on Putin 'Tip creep' is pushing some customers to leave smaller tips, and driving others to avoid businesses that ask for ...

In these shots, a ping-pong ball fired at an unnamed “near-sonic” speed destroys a metal can that, you’ll note, is first dented just by the cushion of air coming from the barrel.