Introduction: The Water Rocket

Step 4 Step Two: Prepare The Fins

Cut three fins in an approximation of the shape above, making sure that the flat part of the fin is shorter than the length of the rocket. Bend the fins in half. Tape the crease to the rocket, spacing the three fins apart evenly (if possible, measure 120 degrees of spacing on the main body of the rocket). Make sure the tips of the fins are pointed downward. After attachment, gently curve the bottom tips of each fin in the same direction.