Step 1: Shopping (enough for 2 launchers)
**** PRINT THIS LIST AND TAKE IT WITH YOU ****
Go to the hardware store and buy...
1 - 10 foot piece of 1/2 inch outer diameter PVC pipe.
8 - 1/2 inch PVC T???s
2 - 1/2 inch PVC elbows
6 - 1/2 inch PVC caps (you may want to buy a couple of extra T's, Elbows and Caps in case you mess up drilling or gluing)
1 PVC pipe cutting tool. Your really don't absolutely need this but it sure make cutting this pipe easier. You can use a hacksaw instead.
PVC Glue and cleaner (primer, often purple in color), comes in a two pack. Your neighbor probably has some you can borrow.
Go to the auto parts store and buy...
2 auto tire valves, also called Schrader valves. The end of them should be able to fit inside a 1/2 inch PVC pipe cap.
You will also need...
several 20 oz soda bottles. The ones that have previously held carbonated beverages. Wash them out or you may get ants!
An abundant supply of water. I like to take a 5 gallon bucket of water out to the launch site.
A standup bicycle tire pump.
A supply of neighborhood kids with dreams of becoming Astronauts! They will get wet!
A nice sunny day!
Step 2: Cut the Pipe!
Step 3: Drill the cap.
Step 4: Glue the contraption together.
Let the glue set overnight. Have a break; drink a 20oz soda or two.
Step 5: Launch Day!
Hook the pump to the tire valve. Fill your 20oz soda bottle 1/4 to 1/3 full of water. Carefully and quickly shove the soda bottle down on the launch pipe. Some bottles will fit on easily; some are going to be much tighter. Hold the soda bottle with your hands and have another person pump air into the launcher. When the air pressure is too great to hold, let go! KEEP YOUR FACE AWAY FROM THE PATH OF THE ROCKET! I told you that you would get wet.