Picture of How to make a baking soda and vinegar rocket
Just recently I bought the Cosmic rocket.It was a mistake.The tube that contained the baking soda and vinegar was so tight that the rocket could not build up enough pressure to take off.It had a good system for launching but it was so tight that only if you put it on lightly could it take off.After I returned it I began to think.I wondered if I could rig up a release like that.I found that 1/2 PVC fit perfectly in the neck of a 1 liter bottle.So this ible was born.I am entering in the epilog contest because it is using a bottle that would other wise be thrown out.I have entered it in a contest so please rate or vote.
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Step 1: Materials

The materials...
1/2 PVC,at least on inch.In the picture I used to much.
wood.Foam would work better but wood is what I had.
1 liter bottle.
hot glue gun.(any kind of glue will do)
baking soda
Thats it!

Step 2: Building the launch pad.

Picture of Building the launch pad.
Now,take your 1/2 inch and cut off a 1 to 2 inch piece.If you are using wood for the base then drill a hole the size of the pipe in it.With foam simply shove the pipe into the foam till it sticks firmly.Then,glue around the bottle until there are no leaks.To make sure there are no leaks blow into the top and seal any leaks with hot glue...lots of it.You just built the launcher!

Step 3: The rocket

Picture of The rocket
Okay,to build the rocket you will need the bottle.You can just use the bottle but take a look at the rocket below.

Step 4: LAUNCH TIME!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Picture of LAUNCH TIME!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Great,you are ready for launching.Put some vinegar in the rocket.Put some baking soda in the piece of pipe.Now,get yourself outside.Attach the rocket to the pipe.Turn the pad upside down so the baking soda falls into the vinegar.Set the pad as shown in the picture and stand back.If you see some minor leaking at the bottle,don't worry.That is normal.It will take off in a very short span of time.Watch as it soars upward,blasting out the fuel.Have fun and don't shoot it at any one.
UPDATEI have found that a propel bottle fits on nice and snug.You might want to give it a try.
Freacnick3 months ago
Fill 1/4 a bottle with vinegar, put 2 tbsp baking soda on a tissue poke in the tissue so it doesnt touch the vinegar, leave some tissue out then put on the cap over a piece of the tissue so it doesnt fall in the vinegar, lastly, tape around the cap so it doesnt release pressure.. THROW IT! *this is for 16 oz meyer grey bottle*

》you can cut down size for smaller sizes《

.-'-''-.-' CAUTION '-.-"-'-.
aheld6 years ago
Hmmm, Having just built one, to these specs. I'm sorry to report that it doesn't work. Since you posted it here, I'm assuming you actually got this to fly... Did you perhaps forget some critical launch or construction tip?
bylerfamily (author)  aheld5 years ago
Now I have added a video.
bylerfamily (author)  aheld6 years ago
It doesn't work?!I got mine to fly right.What bottle are you using?How big of a piece of pipe did you use?What did you make the base from?And,why doesn't it work?Like,it doesn't take off or there's too much leaking around the bottle?Or,if you could post a picture that would help.
DungMachine5 years ago
omegaly sweet!!!
creator 16 years ago
Just letting you know that I just voted for you.
bylerfamily (author)  creator 16 years ago
THESTU6 years ago
Sweet I faved
bylerfamily (author)  THESTU6 years ago
Could you please rate it?I have entered it in a contest.
WOW!Great job!
Cool!I had never thought of using 1/2 inch pipe instead of a rubber stopper or cork. P.S.Favorited.
arefiq6 years ago
oh. great idea.