Picture of Professional water rocket guide
This Instructable will show you the how to build and fly water rockets. Featuring two stage rockets and drop away boosters, and also some basics.
This instructable is based on my knowledge of water rockets, that I have learn in the past few years.

I am not responsible for any damage you infict on your self or others from launching or building water rockets

Have fun building and flying!

Step 1: Lets get Started

Picture of Lets get Started
A water rocket is propelled by pressurised air forcing water down though a nozzle. This creates thrust.

If you took a standard two litre fizzy soft drink bottle and pressurised it to120 psi the rocket would reach about 100 or so feet.

But then if you took 2, two litres bottles and pressurised it to 120 psi again the rocket would go about 150 feet or so because the rocket has more air in it therefore creating more thrust. The rocket will only go 50 feet more because of the added mass. You can stop this by making a two stage rocket. A two stage rocket will work better because it would not have to carry the full payload on all of its flight.
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AlirezaJ9 months ago

oh i made it some years ago later

nlane61 year ago

I know you have heard this same thing many times before, but I'm sending you this message because I feel you can do better than this!

Whenever, someone puts “Copyright[insert name/date here]” embedded
in a photo or creation, that person is really doing nothing more than
alienating their audience. I fully understand why you have done this. However, I
feel in doing so you have tainted your otherwise-good tutorial.

To put it plainly, viewers just don’t care where your ideas
came from or who the first to think of it was. As long as the tutorial contains
enough clear and quality information to complete the project, and the viewer is
not offended by such content, they will usually give positive feedback. What
you have done here is inadvertently offended/alienated the viewer by using a
copyright stamp, they are most likely offended because the use of a copyright
stamp usually denotes the expectation of payment due to its common use in industry
to prevent copy without consent. Let’s be honest, nobody likes to pay for
things, so as soon as somebody sees this they will probably lose 50% of their
interest in the project (especially when browsing a free-for-use content site
like Instructables.com).

Another factor playing into this is the assumption/doubt
that this is a legate copyright. If you have indeed gone through all procedures
to acquire such a copyright, I’m sorry to break it to you, but you are wasting
your time! These allegedly copyrighted ideas/illustrations are easily replicated
without a copyright stamp by simply placing a white square over the affected
part using common software such as MS paint. Although illegal, this is how many
works are stolen and claimed by others to be their “original work”. If these
copyrights are false or you do not rightfully own the content covered, you are probably
in violation of patent law. Either way, all you have done is turned off your audience
from any further business with you, the author due to your choice to exhibit a

Yes, in a perfect world, everyone would/should acknowledge
all the sources from which they have pulled. In reality this just not practical.
First off, nobody is going to be able to recognize each and every individual
who may have contributed or had a similar idea. This is because on almost every
simple project (such as those on Instructables), nobody knows where all the
ideas came from. For example, Leonardo da Vinci is commonly credited with
inventing the parachute. Although this was never entirely his idea, he may have
put his own spin on it, creating his version, known in the history books. This
was most likely done by compiling numerous other concepts, created by others,
most of which even he wouldn’t know the origins of. He may have even incorporated
concepts that he was familiarized with during childhood by his mentors, years
before he first thought of the invention. It is this type of idea-building that
has driven millenniums of technological progress.

Bottom line is, unless your idea is a complex piece of
highly-developed, never-before-seen technology, and is at-risk of being copied (for
profit) by another party, copyrighting it is a waste of time and is frowned
upon by your audience. You have presented these ideas on a website known for
offering free-to-use tutorials/content, in addition to the fact that you have blatantly
told anyone and everyone how to build your device. These facts show that you
are intending for your project to be free-for-use/public domain. And therefore
should never have been copyrighted.

The part that disappoints me the most is that you have used
ideas from another site (no credit given to Air command Rockets) and all the
while expected us to give you credit for your ideas. Note that Air Command’s boosters
also function by being “held on by the upthrust of the bottles” (step 14), (see
for comparison). It would have been fine for this site had you left it at something
like “I have created boosters that fall away after the trust is depleted…”. But
you just had to dig yourself a trench by saying “These drop away boosters are different
to Air Commands.” (step 14) “Professional” indeed!

oscarthompson- My suggestion for you is to:

  • Remove the false copyrights if they are illegitimate
  • Revamp this Instructable to include citations
    where necessary, OR re-word it as not to claim ownership of any questionable-owned
  • Try to be more considerate of you audience in
    future postings by not attempting to copyright things that are to be posted as
  • Stop trying to be a company, you are a man with ideas, not some business trying to make a quick buck!

As for anyone thinking that copying ideas and claiming them
for their own is okay:

Copyrights are in place to protect those who have worked
hardest on their intellectual property. An example of a clear violation of this
would be somebody copying an entire Instructables, such as this one, editing
out the author’s name, and re-posting the ideas represented as under their own
name. Even though this is not copyrighted, it is still not your property, and illegally
copying it as “your work” is considered plagiarism (which can also be illegal).
A good rule of thumb is to go with your gut-feeling, if you don’t truly feel/know
it belongs to you, then don’t use it, or at least don’t take credit for it as a
”completely new idea”. Even better would be to hunt down the work, from which
you originally got the ideas, and properly cite them. This shows your audience that
you value their interest and encourage them to find out more about your
project. One last point to consider, is to not try to label a work as private
property, when it is supporting content intended to be freely used by others,
on a regular basis. That’s not a law, it’s just polite.

that looks intense

Dude is this okay.

What are you doing?

but cool

Talal Aziz1 year ago

i cant understand how the parachute will open ???

DOWNESJE3 years ago
cool rocket
firezone5 years ago
do you actually own the copyright to these diagrams, i highly doubt you have gone through what is needed to have the copyright for them and putting that little "copyright OscarThompson" in your pictures doesn't actually do anything
don't be mean to the person it is a good rocket
He is just putting acknowledgment that it is his.
Ian01 firezone5 years ago
I'm pretty sure you get copyright automatically, even if you don't claim it.
oscarthompson (author)  firezone5 years ago
I have only put it in so people can't use my pictures, unless they want my name on it. The my pictures as i drew them on paint, it really doesn't matter too much that i havn't copyrighted them.


paulmtchj3 years ago
hello oscarthompson could i plz have ur email because i have a few questions on specific aspects of the project :) thank you
Chemdude1183 years ago
I use small sections of threaded lamp rod for my water rockets, but I don't know about oscarthompson.
enzo aspire3 years ago
nice project do you have a video of it flying i wana see how it fly's so i know if it worth making
cbills3 years ago
nice water rocket
do you have a web site
oscarthompson (author)  cbills3 years ago
Unfortunatly not. You should check out aircommand water rockets though!


i like it!! definately gonna make sumthin like this one
teenuvibhav4 years ago
verry good ilike
leiamme4 years ago
What kind of plumbing coupling?
famos_amos4 years ago
what with the picture?
rocketman204 years ago
how long will the pressure hold
Wow, this is amazing! Keep up the good work!
Kryptonite5 years ago
Wow, nice build!
popscott35 years ago
What kind of glue should I use
oscarthompson (author)  needfortoast5 years ago
I used bostik soft plastics glue and it works fine for me. Although you can use PL premuim, but this is a bit more expensive and harder to get hold of in the UK, but it may give you better results.

who cares if he has a copyright?!?!? this is a great instructable that i used to spend a few hours with my daughter AND an instructional speech for my speech class. but the instructions you put on here were clear and easy to read. and i researched the launcher online for several hours and i believe this to be the best one.

i used the 2 bottle design and i used gorilla glue (which is stronger than hot glue). the thing reached 15 to 20 feet in the air and the reason for this failure was my choice of glue. the glue expanded like it is designed to BUT this glue is not a good adhesive for the plastic in the bottles.

i can see the potential if i just follow instructions (this was a problem for me growing up). i always think i can improve the process, but once again i am wrong. but my daughter had an awesome time, i had a great time, and we got the whole family together for the launch so the project was still an overall success. i will be building bigger and better in the near future.

thanks for the great instructable oscarthompson!
I used to make make water rockets when I was a kid.  All I ever used was a 2 liter bottle, duct tape, and the valve stem from a tire.  Drill a hole just slightly smaller than the valve stem in the plastic lid and jam the sucker through it as far as you can, wrap the bottle with duct tape (just one layer is fine) - this is a "better safe than sorry kinda thing" -  never had one blow up.  Fill the bottle about 1/5 of the way with water, use a hand pump or air compressor to add about 45 psi, turn upside down and unscrew the lid.  Mine usually went above 100 feet easy, of course I used a bit more pressure.  ;)
oscarthompson (author)  jason.buckmann5 years ago
Thanks, you made my day !
TSC5 years ago
I'm gus this does not go high   it looks to big to go high!!! But any way sweet!!! 5stars!!!!!!!!
Lowney5 years ago
Can we see a video of your big rocket?
max05065 years ago
what do you mean with rubber bung in the part list of step 10
oscarthompson (author)  max05065 years ago
rubber bungs like the ones in wine bottle's but rubber. Type it in to google images

I see thanx
i like the idea but i don't konw anything.
How can i do for fill the boosters?
do i have to put their a valvle each?
and are the boosters gonig to fall down?
if yeah how will i do it ?
thanks for the  ideas.

oscarthompson (author)  juanpedro1325 years ago
You can fill the boosters by putting the water in the top of the bottle. The bicycle valave will help prevent leakage.
The boosters will fall down when the thrust of the booster can no longer beat the air resistance thus gravity pulling the booster down.

This can be achieved by making three of the launch mechanism's just on one Pad ( two for boosters one for main)

rhendric5 years ago
good so far, but the diagram for this step cannot be viewed properly at the current size, and even when viewed at the right size, it is very hard to understand.
m_debator5 years ago
This is AWESOME!  Its the John Holmes of water bottle rockets.
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