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Water/Air
Rocket
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Water/Air Rocket - 1999
Overview
Well, it's summer, and in California it
can get quite hot. Back when I was in middle school my friends and I
were bored so we decided to make something that was fun for the heat. So
I designed a water
rocket. I had seen other web pages out there with water rockets, so I thought I
would give it a try. The water rocket made here is pretty nice because
it is
hand-held, compact, has a finned projectile and performs quite well.
The water rocket can shoot very far
and stays up in the
air for about ten seconds.
Launcher construction
The launcher is very simple to build. All that it
consist of, is the gauge, fill valve, and quick-disconnect garden hose valve. The release
mechanism is made with a garden hose quick-disconnect valve.
Rocket construction
 The rocket itself, is made from two soda bottles. The first
bottle, is the main chamber and the other bottle is used as fins and nose cone.
Get two soda bottles. Leave one aside, and cut
the other one into segments as shown in the diagram. The nose cone, is to be taped
to the main body. Make sure you leave the cap on the end. The fin segment must
be cut into shape before taping to body. Cut away a segment in the fins section so
it looks like the diagram (I know it is tricky, so look at the photos bellow for more
info).
Next, you must make the nozzle. This is a
tricky part, but it can be done. You must drill a hole in the cap the same size as the
quick-disconnect male adapter. Then insert, and epoxy in place. This
must be sealed well, otherwise you will have some major problems. Look at the photos bellow
for more info.
Firing The Rocket
Fill the main chamber half with water. Connect
the rocket to the launcher. Pump up the rocket to about 40 PSI (You can gradually
get to higher PSI, if needed). Hold the rocket, and pull down on the
quick-disconnect valve. The rocket should shoot out a stream of water and fly very
high in the air. NOTE: You may not want to "eye" or aim the cannon, you
will get shot in the face with water.
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