Water Rocket Construction
Materials Needed: Low temperature hot melt, glue or duct tape, balsa, bass or THICK mounting board ( At least 1/8 - 1/4 inch thick)
Step 1: Cut the bottom off a bottle
Step 2: Attach a parachute to the elastic near the top of the uncut bottle.
Step 3: Tape or glue a heavy paper around the bottles, loosely.
Step 4: Tape only the bottom of the wrapped paper. This will allow the top bottle to come off. The top should be VERY loose. Air Pressure will keep it on during ascent.
click for more information on constructing a hydro rocket.
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