5 . . . 4 . . . 3 . . . 2 . . . Lite - Blast Off

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Updated on Mar 26, 2010

If you’ve ever shot off a bottle rocket, you’d probably like to know how to make it go even higher. So did Daniel Stenavich, so he made it the main topic of his science project.

The figure shows his project display.

Figure: Project display for “5 . . . 4 . . . 3 . . . 2 . . . liter — Blast off.”

Hypothesis

I believe that the rocket, when launched, will reach its highest altitude when 50 percent of the bottle’s capacity is filled with water.

Materials

• Bottle rocket (built according to instructions included in the project notebook)
• Rocket launcher (built according to instructions included in the project notebook)
• Measuring cup
• Water
• Angle finder
• Tape measure

Procedures

The following procedures explain how to fill the bottle rocket, launch it using the specified amount of water pressure, and measure the angle formed by the altitude that the rocket reaches.

1. Make bottle rocket. (The instructions for this were explained in the Materials section of the student’s project notebook.)
2. Make bottle rocket launcher.(The instructions for this were explained in the Materials section of the student’s project notebook.)
3. Launch an empty bottle rocket five times. Measure the angle of height with angle finder and record the height in feet.
4. Add 200 ml of water to the bottle rocket and launch it five times. Measure the angle of height with angle finder and record the height in feet.
5. Add 200 ml of water every 5 launches until the bottle rocket is at full capacity (2,000 ml). Measure the angle of height with angle finder and record the height in feet.

Results

The table shows the results for this project.

Table Height (in Feet) of Bottle Rocket Launches for Each Trial
 Amounts of Water Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Average 0 ml 21.1 29.1 29.1 26.4 26.4 26.42 100 ml 48.7 54.5 83.1 60.6 63.6 62.1 200 ml 105 90.1 83.1 113 90.1 96.26 300 ml 97.4 117.1 105 117.1 105 108.32 400 ml 101.1 93.7 83.1 86.6 93.7 91.64 500 ml 93.7 105 86.6 90.1 83.1 91.7 600 ml 105 121.4 101.1 113 108.9 109.88 700 ml 121.4 105 113 113 108.9 112.26 800 ml 144.8 121.4 113 121.4 108.9 121.9 900 ml 125.8 103.3 105 125.8 121.4 116.26 1,000 ml 121.4 121.4 121.4 125.8 125.8 123.16 1,100 ml 113 105 113 113 101.1 109.02 1,150 ml 117.1 117.1 121.4 113 125.8 118.88 1,200 ml 144.8 130.3 125.8 121.4 117.1 127.88 1,250 ml 125.8 125.8 130.3 135 125.8 128.54 1,300 ml 113 97.4 101.1 93.7 121.4 105.32 1,400 ml 86.6 108.9 69.9 66.7 101.1 86.64 1,500 ml 45.8 48.7 51.6 45.8 48.7 48.12 1,600 ml 37.3 26.4 66.7 43 18.4 38.36 1,700 ml 21 18.4 23.7 13.1 18.4 18.92 1,800 ml 7.8 10.4 5.2 7.8 13.1 8.86 1,900 ml 2.6 5.2 2.6 5.2 5.2 4.16 2,000 ml 0 2.6 0 0 2.6 1.04 Average 82.6 80.8 79.8 80.5 79.8 80.7

Conclusions

In most of the launches, the rocket reached the highest altitude when filled with 1200–1250 ml of water. That’s just more than half full.

In conclusion, the hypothesis of filling the bottle with 50 percent water was incorrect. The rocket reached the highest altitude when it was 60 percent full.