Cork Rocket




This is a very simple rocket that you can build with home materials.
It is powered with water, vinegar, salt, and baking soda.

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Step 1: Materials

materials you will need:
- water
- vinegar
- salt
- baking soda
- cork
- plastic bottle (any bottle will work if the cork fits snugly into the mouth)
- toilet paper
- rubber band or string

tools you will need:
- knife
- funnel (optional)
- cup

Step 2: Adding the Propelant

Take the vinegar and pour about 1 cup into the cup or dish. Then pour some water so that you have an even amount of water into the dish. Now you should have a 50/50 mixture in the dish. Place the funnel into the bottle mouth and pour the 50/50 mixture into the bottle.

Step 3: Making the Charge

pour some baking soda and salt onto a piece of toilet paper. Mix it together. Fold it together. Tie it together. Poke it a couple of times. Make sure it fits down the mouth of the bottle, but do not drop it in yet.

Step 4: Preparing the Cork

Take the cork and see if it fits snugly into the bottle. If it is too big, trim it with the knife until it fits. If it is too small, you may need to get a smaller bottle.

Step 5: Count Down

Go out side. As quickly as you can, drop the charge into the bottle and push the cork as tightly into the bottle as you can. If it is not tight, air will seep out of the sides.


Have fun!

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    26 Discussions

    rocket is good. but why u add water to vinegar as it already contain water in it.


    10 years ago on Introduction

    If the cork is too small, you could just put it in the microwave for ~25s. It expands a little. But it works only with natural corks (not the plastic ones). BTW Nice instructable!

    2 replies
    creator 1bylerfamily

    Reply 10 years ago on Introduction

    The salt makes the reaction last longer. You probably don't really need the salt, but that's the way I've always done it. Thanks for asking! see ya ( not literally) lol ><> creator 1

    creator 1julyer97

    Reply 10 years ago on Introduction

    Maybe you didn't have the cork on tight enough. Or, maybe too much air was let out before the cork was placed in the mouth of the bottle. Those were the only reason I had duds. creator 1

    julyer97creator 1

    Reply 10 years ago on Introduction

    actually i didn't have any cork around, but i had this stirofoam stuff, guess that didnt work


    10 years ago on Introduction

    What u could also do is attach the bag of baking soda and salt to the cork so when u shake it. It comes loose and falls in

    3 replies
    creator 1wee_man

    Reply 10 years ago on Introduction

    With the mentos and coke you really have to do that because the reaction is so fast. The reaction for this little cannon however is a little slower, so it is not absolutely needed. good idea though! ><> creator 1

    creator 1temp

    Reply 10 years ago on Introduction

    Absolutely! I went camping with the rest of my family once, and we bought some dry ice to keep the food in our cooler cold. My dad was showing us how cold that stuff was. We had a half full water jug, and my dad put a little chip inside it and closed the lid. I made a really loud noise, and we never found the lid for the jug. In other words, you should try it. Be careful! creator 1