ultimate water rocket

i need help to build a water rocket that when it reaches the highest point a device for making the fall slower like the back pack of the skydivers something like that so please i will upload a video and give you credits so please help!!! o and remember it has to be cheap for a 15 year old budget

westfw10 years ago
There's lots of info on water rockets on the net. Try a google search for "water rocket" Parachute