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Picture of 2 Liter Rocket
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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 (or construction paper)
  • 1 Cork
  • 1 Schrader needle (common on most bicycle pumps)
  • Tape

Tools:

  • Excato Knife
  • Drill (or awl)
  • Scissors
  • Bike pump
  • Marker (or pen)

Step 1: The Cork Stopper

Picture of The Cork Stopper
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Take a cork and stick it into the soda bottle's opening to make sure that it fits in snugly. The seal has to be tight, so if your cork doesn't fit either find a larger diameter cork, or wrap the cork with tape to increase the diameter.

Cut the cork shorter so that the Schrader needle is longer than the cork, the tip of the Schrader needle has an opening that needs to be exposed.

 
TimB236 minutes ago

Why not use a small hobby type air compressor or portable compressed air tank to pressurize the rocket? All I've ever seen is hand operated pumps.

MichaelN TimB222 seconds ago

We use one of the cheap portable jump-starter packs that has a12V lead-acid battery and inbuilt compressor. Works great. I'm planning a smaller unit using a 12V $10 compressor and LiPo battery pack.

Debbi Doodles3 minutes ago

You rock ! My son is the same way. I just posted you all over FB and the Geeks that love good geek stuff! Thank you for your awesome ideas! :-)

altomic3 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.

what do you mean 'multistage'? how did they do it?

timers that make the next bottle launch as soon as the previous stage stops

chobbs19572 days ago
This is a great fun idea. Thanks
chobbs19572 days ago
This is a great fun idea. Thanks
chobbs19572 days ago
This is a great fun idea. Thanks
chobbs19572 days ago
This is a great fun idea. Thanks
arothschild3 years ago
This looks really fun! Good project for holiday break!
TheGeek19843 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.