Air powered rocket launcher rvfm ph10805 p this rocket launcher is a working device that helps students to visualise the principle of action and reaction forces p p a 2 litre plastic bottle not included is used as a rocket students can create a variety of rocket designs using empty fizzy drink bottles as part of a design and make project the launch pad has a solid durable metal base and is equipped with a simple triggering mechanism it is powered by an ordinary bicycle pump and can