Recently I built, and launched a water rocket. It was so fun watching it fly up and drop to the ground! Although it was a good launch and all, I thought about improvements I could make. It might have made a difference, though I can't really tell. So, I really enjoyed building building and launching this rocket, and I hope you do too.
(By the way, if you liked this Instructable please vote for me in the Summer Camp Challenge)
Step 1: Getting the Materials(launcher)
To build the launcher, you need PVC pipes and connectors. I got all the materials at home depot at less than 10$ for all the parts (not including the glue).
The following are the parts-
-10' half inch pipe
-4 PVC caps (matches the pipe)
-1 90 degree elbow joint
-1 45 degree elbow joint (90 degree joints also work)
-1 air valve
Also-cement (not the stone kind)
Step 2: Cutting the PVC
You need to cut the PVC pipe into 10 pieces.
You need seven 12 inch long pieces,
one 6 inch piece,
one 9 inch piece,
and one 3 inch piece
You should also drill a hole in one of the PVC caps to fit the valve.
Step 3: Dry Fit
Fit each piece of PVC into the joints and connectors, as shown in the picture below.
Step 4: Glue It Together
Once you have dry fitted the pieces, and it looks right, glue it. Make sure you glue the frame together first and then put together the actual launcher, air valve, and the other pieces that are partially or fully vertical.
Step 5: Build the Rocket
While the glue is drying, get started on the rocket. You need one twenty ounce bottle and three dowels three inches long, as shown.
Glue the three dowels to the top (in this case the bottom) of the rocket at an angle with hot glue. Then, use clear packing tape to skin the dowel to the bottle.
Step 6: Get the Launch Ready
After the glue has dried, you are ready to launch. Use a pump to fill up the frame/launcher with air(make sure your valve is shut). You should generally keep it in the seventies and eighties, but feel free to experiment. (FYI the rocket's performance may vary upon how you built the rocket or launcher). Then fill up the bottle 1/3 of the way, and quickly put it over the launching area.
Step 7: Launch It!
Once you got the launch ready, launch it! Just turn the valve and watch it fly
For extra fun, try to catch the rocket as it falls to the ground.
Step 8: Tips
1. When experimenting with air pressure, start off low.
2. Try experimenting with how much water is in it to see the performance.
3. When launching, be cautious, because too much pressure can lead the launcher or rocket to burst.
4. And last, but not least, have fun!!!!!