DIY bottle rocket—this really works!

If no, make sure the valve can open to let air through from the pump. It may be damaged or screwed shut. If the rocket does ... Start with the bottle one quarter full (500ml water in a 2l bottle ...

Building this launcher is simple if you already have a mill. It does a remarkable job of pressurizing and launching soda bottles which are partially filled with water. The main component of this ...

He’ll be the talk of the 4th of July picnic once he brings out his latest build—a weaponized, remote-controlled strandbeest that shoots bottle rockets. There are a bank of money shots up on Imgur.