Instructables
Picture of 2 Liter Rocket
Looking for something exciting to do? Try building a water powered rocket out of a 2 liter soda bottle. This can be completed in less than half an hour with simple household materials.

Materials:
   1 Two liter bottle
   Cardboard
   Card stock although construction paper will work
   1 Cork
   1 Schrader needle
   Tape

Tools
   Excato Knife
   Scissors
   Bike pump
 
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Step 2: The Fins

To make the fins take a piece of cardboard and cut out 4 equal fins. The fins should be about 2 inches wide at the base and 8 inches high. I only ended up using 3 fins and kept the 4th as a spare.

Attach the fins with about an inch long strip of tape on each side at the top of the fins to the point just above where the bottle starts to curve inwards. Seen picture 3 below. One way to help space the fins out equally is to take a piece of paper and wrap it around the circumference of the bottle then take it off and fold it into thirds, marking each third. Then put it back around the bottle and mark each point.
altomic2 years ago
i saw a contest on Japanese TV which was a bottle rocket contest based entirely on distance achieved.

the winner was a multistage rocket as made here. it had launching tracks and went about 500 feet.

awesome.
arothschild2 years ago
This looks really fun! Good project for holiday break!
TheGeek19842 years ago
For a school science class we made these. I never got to see mine go up though. It went the highest from what I was told, but I wasn't in school that day because unfortunately the night before was my grandfather's memorial service and my mom turned off my brother's and my alarm clock. She didn't want to make us go to school the following day, she thought it would be too hard. Anyway, my science teacher was also the photography teacher, and even though she set my rocket aside so I could see it fly, her photography students threw it out. I've been meaning to make another, but didn't have any way to get it in the air.
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