How to Make a Water Rocket?




Introduction: How to Make a Water Rocket?

This time I would like to present a simple way to make a water rocket. I hope that my step by step instructions will make it very easy and enjoyable.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Used Materials

- 3 plastic 2L bottles
- cardboard
- scotch tape
- duct tape
- one tennis ball
- fishing line
- one big trash bag

Step 2: Preparing the Rocket Wings

Draw 4 right triangles on the cardboard (3.5 in x 5 in x 6.5 in each) and cut them.

Step 3: Attaching Wings to the Main Bottle.

Put the bottle upside down.In order to avoid any confusions, I will call it the main bottle. Attach each wing 3 inches from the cap, using duct tape. You can also stick the tape on the surface of triangles to make them more stable. Make sure you placed the wings with the same distance from each other. It will help the rocket go straight up.

Step 4: Preparing the First Part of Rocket's Extension.

In this step you will cut another bottle to get a plastic tube. Cut off bottleneck and the bottom. In this way you are left with a cylindric tube, which you are going to use as your extension.

Step 5: Attaching First Extension to the Main Bottle

Tightly connect the plastic tube with the main bottle, using scotch tape. Try to connect them perfectly straight. It will help to keep the balance of your future rocket.

Step 6: Preparing the Final Part of Rocket's Extension

Cut off the bottleneck from your last plastic bottle. Overlap the rocket with that final extension, placing it in exactly opposite way to the main bottle. To make sure it won't get disconnected during the flight, use a duct tape. Because the top edge is sharp, I taped it to prevent my future parachute from cutting.

Step 7: Preparing the Upper Part of the Parachute

From a trash bag cut the octagon figure. (The bigger parachute you make, the longer time it stays in the air!!! ) Stick duct tape on each corner (both sides) ,then use a puncher to make wholes (.5 inch from the edge). It will prevent used trash bag from ripping apart.

Step 8: Preparing the Lower Part of the Parachute

Cut 8 strings from a fishing line. All of them have to be the same lenght. ( around 2/3 of the octagon's diameter). Attach the strings to a tennis ball. In order to do it, first lance a ball on both sides(top and bottom). Then pull the strings through it and use duct tape to make it solid.

Step 9: Finishing the Parachute.

Connect each string to the hole. Tight them firmly. Again, make sure that all string are the same lenght.

Step 10: Placing Obtained Parachute in the Rocket

Carefuly fold the parachute and place it into the "basket" from the final extension part. Do not squeeze it to hard, because it won't come out in the air. Put the tennis ball on the top of the parachaute.

Step 11: Congratulations!!! You Made It!!!!

I hope you enjoyed working on this project. I wish you good luck with the launch and an enormously high score!

Be the First to Share


    • Trash to Treasure Contest

      Trash to Treasure Contest
    • Rope & String Speed Challenge

      Rope & String Speed Challenge
    • Wearables Contest

      Wearables Contest

    7 Discussions


    8 years ago on Introduction

    you can look up a water rocket launcher on this site , you can build it yourself


    8 years ago on Step 11

    Aquapod water rocket launcher, will cost about 24 us dollars and ships quickly

    john whitaker

    how do you launch it I spent 4 hours building one last night and i was looking everywhere to see if anyone knew a easy way to launch im 13 and 4 hours of building somthing and not being able to use it


    10 years ago on Introduction

    Is this for a class because a lot of people have been posting rockets very similar to yours, all new members and all have a tennis ball payload desgin


    Reply 9 years ago on Introduction

    The first one I read said something about an assignment for physics class.


    10 years ago on Step 11

    Thnks for the help yours is the most understandable . because all the rest i cant really get.But I hope you ad some thing on how to launch it