How do you build a 20oz bottle rocket?

Answer 1

To build a 20oz bottle rocket, start by thoroughly cleaning and drying a 20oz plastic soda bottle. Fill the bottle about one-third full with water, then insert a cork snugly into the opening, ensuring it can withstand pressure. Attach fins made from cardboard or plastic to stabilize the rocket during flight, and create a launch pad from which to launch the rocket safely. Finally, using a bicycle pump, carefully pump air into the bottle through a valve or tube until the pressure builds enough to launch the rocket when the cork is released.