Simplest Bottle Rocket Ever




Introduction: Simplest Bottle Rocket Ever

This is my first instructable so i hope you like it. I have been making these rockets for about 4 years and nothing else compares to amount of fun you can have for it being so easy. I will show you how to make the basic rocket and from there you can experiment with it, i have put these on boats and cars with surprising results.

Step 1: Gather Your Materials

All you will need for this instructable is
-1 soda bottle(with cap)
-a used toilet paper roll
-a knife
-safety goggles(not shown)
-rubbing alcohol
-grill lighter(not shown)

Step 2: Rocket Nozzle

What you will need to do is CAREFULLY round out a hole in the center of the soda bottle cap(you could use a drill for this).You want your hole to be about 1/4in or so.This is one of the things you might want to play around with after you have finished, the size of the hole will effect the performance of your rocket.

Step 3: Launching Platform

For this step you will need to take your toilet paper roll and cut out a hole about 3/4in sq. The hole should be about 1/3 of the way from the top of the roll.

Step 4: Fueling and Launching

Now that you rocket is complete its time to fuel it up and launch it off. To fuel your rocket you need to pour just enough rubbing alcohol into your soda bottle so that it covers all the sides but you do not want a pool of alcohol in the bottom, now screw on the cap and set the bottle upside down like in the picture and your ready for liftoff. When your ready to launch, put on your safety goggles, hold the grill lighter up to the hole and let a little gas flow in before lighting the lighter then light the lighter and WOOOSSSSSHHHH!!!! we have liftoff. Now that you have a working rocket you can add fins a nosecone or whatever you please, you can vary the size of the nozzle and the amount of fuel, the max height i have gotten with one of these rockets is a little over 20ft. I hope you enjoyed my first instructables, please leave comments and vote for me in the Launch It challenge. -Sorry about the video quality and please be very careful wile i have never been hurt of had any accidents with these, it's always possible.

-you can use a 2ltr bottle with the same cap and launching procedure but you will defiantly want to do this outside for they are alot more powerful, i have had 2ltr bottles go up to 40+ feet
-for ignition you can use a piezo igniter from a grill and add a length of wire to it and set the wire just inside the cap



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    30 Discussions

    can you use metho for this experiment

    is this method quite powerful or not

    can i use white spirit or aerosol or parafin ?

    uhh yea it hit a rock and flew ontologies of a building.


    I have made a 3D printable nozzle that would work quite well for this:

    Strongly suggest you wear heavy gloves when you do this, or else use a reasonably long stick for lighting. I know the lighter you are using is probably one of those long ones, but I still think it's a good idea. The exhaust from something like this can raise a huge blister, at least. (And I know this from experience, though what I was doing was a bit less clever than what you are doing. That was back in the '60s!) Plus you should have goggles on. If the nozzle clogs somehow, I suspect you could get a pretty substantial pressure in that bottle and it might burst. You wouldn't want to get even a little bit of flying plastic in your eye.

    Long ago, I did something like this with a plastic milk bottle and propane. Since I didn't use a nozzle, it didn't go very far at all. However, I'm not sure they're strong enough that they wouldn't burst if you used a nozzle. So if you try it, figure out how to light it from a ways back. Certain bottles will make spectacular whistling noises if you do this kind of thing, which is how I got the blister I mentioned before.

    You might find the mix easier to get consistent if you use an eyedropper to measure the alcohol you're putting in.

    Regular water rockets can go much higher than this, though they're a bit more work. They're also a bit hazardous, or at least they can be, which is perhaps less obvious because of the lack of fire.

    u could use an awl for this but it wouldnt be big enough

    i made a small hole about 4mm in diameter near the top of rocket, bottom of bottle, covered with a piece of weak electrical tape, will pop off if there is excess pressure!

    Well, as they showed on Mythbusters, and as I have had experience with it, gasoline is much more dangerous than many other "fuels".

    So be careful if you use it.

    no the alcohol is supposed to stay in. when you shake the bottle most of the fuel will turn to vapours

    yer i make mine without toilet paper and light it with a match and the fuel used was metho and it went GREAT