Materials
1. Bottles-1.25L (coke, large)
-750mL (cool, medium)
-500mL (bonaqua, small)
-500mL (大和, small)
-330mL (bonaqua, tiny)
2. Pump
3. Water

Ratio of the air to that of the water
1. 1:1
2. 2:1
3. 3:1

Venue
1. The vacancy beside Hong Kong Federation of the Blind (lumpy)
2. The basketball court of our school (evenness)

Time
1. 15-11-2003
2. 6-12-2003

Experiments

1. Bottle-coke (1.25L)
Ratio-1:1
Venue-lumpy
Frequency of pumping-53
Result-failure
Reason-the cover of the bottle was too tighten,
so inside the bottle, there had some vapour.

2. Bottle-coke (1.25L)
Ratio-1:1
Venue-lumpy
Frequency of pumping-23
Result-about three floor height
Direction of the bottle blastoff to the air then falls down-

3. Bottle-coke (1.25L)
Ratio-2:1
Venue-evenness
Frequency of pumping-98
Result-about seven floor height (not accurate)
Reason-puncture in the midway
Direction of the bottle blastoff to the air then falls down-

4. Bottle-coke (1.25L)
Ratio-2:1
Venue-evenness
Result-failure
Reason-puncture

5. Bottle-coke (1.25L)
Ratio-2:1
Venue-evenness
Frequency of pumping-42
Result-about six floor height
Direction of the bottle blastoff to the air then falls down-

6. Bottle-cool (750mL)
Ratio-1:1
Venue-lumpy
Frequency of pumping-15
Result-about one floor height
Direction of the bottle blastoff to the air then falls down-

7. Bottle-cool (750mL)
Ratio-2:1
Venue-evenness
Frequency of pumping-39
Result-about seven floor height
Direction of the bottle blastoff to the air then falls down-

8. Bottle-bonaqua (500mL)
Ratio-1:1
Venue-evenness
Result-failure
Reason-puncture and water was leaking

9. Bottle- bonaqua (500mL)
Ratio-1:1
Venue-evenness
Frequency of pumping-10
Result-about seven floor height
Direction of the bottle blastoff to the air then falls down-

10. Bottle- bonaqua (500mL)
Ratio-2:1
Venue-evenness
Result-failure
Reason-water was leaking

11. Bottle- bonaqua (500mL)
Ratio-2:1
Venue-evenness
Result-failure
Reason-puncture

12. Bottle- bonaqua (500mL)
Ratio-2:1
Venue-evenness
Frequency of pumping-27
Result-about seven floor height
Direction of the bottle blastoff to the air then falls down-

13. Bottle- 大和 (500mL)
Ratio-1:1
Venue-lumpy
Frequency of pumping-5
Result-failure
Reason- the cover of the bottle was too loose, so the water
rocket bounces a little bit and then falls down

14. Bottle- 大和 (500mL)
Ratio-1:1
Venue-evenness
Frequency of pumping-18
Result-about four floor height
Direction of the bottle blastoff to the air then falls down-

15. Bottle- 大和 (500mL)
Ratio-2:1
Venue-evenness
Frequency of pumping-21
Result-about six floor height
Direction of the bottle blastoff to the air then falls down-

16. Bottle- 大和 (500mL)
Ratio-3:1
Venue-evenness
Frequency of pumping-24
Result-about six floor height
Direction of the bottle blastoff to the air then falls down-

17. Bottle- bonaqua (330mL)
Ratio-1:1
Venue-evenness
Result-failure
Reason-puncture

18. Bottle- bonaqua (330mL)
Ratio-1:1
Venue-evenness
Frequency of pumping-10
Result-about five floor height
Direction of the bottle blastoff to the air then falls down-

19. Bottle- bonaqua (330mL)
Ratio-2:1
Venue-evenness
Frequency of pumping-10
Result-about six floor height
Direction of the bottle blastoff to the air then falls down-

BACK