Step 8: Prepare for Launch

boy looks on as girl loads a bottle onto the PVC tubing filled a third of the way with water
Photo: Ask This Old House TV
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Fill a 2-liter bottle about one-third full of water and slide it onto the end of the pipe. Pull the string on the trigger down so that the bottle can seat against the bulge and the cable ties can catch the bottle's lip. Release the string and let the trigger slide back over the cable ties to hold the bottle in place.
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    Tools List

    • hacksaw
      hacksaw
    • drill
      drill/driver fitted with a ½-inch bit
    • adjustable pliers
      pliers
    • utility scissors
      scissors

    Shopping List

    1. 10-foot length of ½-inch PVC pipe
    2. ½-inch PVC tee
    3. two ½-inch PVC end caps
    4. 2-inch-long scrap of 1½-inch PVC pipe
    5. PVC pipe cleaner
    6. PVC pipe cement
    7. replacement valve for a tubeless tire
    8. plastic cable ties, aka zip ties
    9. birthday candle
    10. duct tape
    11. clamp for 1½-inch hose
    12. two 2-liter soda bottles
    13. string (regular twine or cotton string is fine)