Introduction: The Water Rocket

The Water Rocket is a plastic-bottle based rocket which uses pressurized water to propel it upwards and then a parachute to keep it's payload, here, a tennis ball, in the air for a longer period of time. The model in this Instructable is based on a 2-liter bottle, and should, if properly built, stay in the air for over 25 seconds.

Step 1 Step Zero: Gather Materials

To properly build the rocket, have these materials on hand:

" Two 2-L bottles
" Cardboard
" Scissors
" String (30 meters should be more than enough)
" Painters Dropcloth (Can be found at most hardware stores)
" Tape (Not scotch, preferably)
" Tennis Ball
" Baby/Talcum Powder [optional]

For Launch:

" Water
" Launcher
" Pressure Pump
" Additional Cardboard

Comments

[Ian01]

I agree with cowscankill: Compared to the other ones in your physics class, your rocket looks like it was made in a hurry.

[cowscankill]

Pretty nice Instructable, but I got to say (and no offense) but the rocket seems pretty cheap. You could make it look a lot neater than that with a tad more effort, but if it works, hey it works.