18 A Water Hyacinth Harvester
203
Table 18.2 Dimensions of
sprockets used in sprocket
analysis
Sprocket 1
Sprocket 2
Sprocket 3
Diameter =
101.29 mm
Diameter =
138.97 mm
Diameter =
171.91 mm
No of teeth = 24
No of teeth = 34
No of teeth = 42
Table 18.3 Sprocket analysis
result
Distance (m)
Sprockets
Sprocket 1
Sprocket 2
Sprocket 3
1
10.05
8.73
7.14
2
20.07
17.4
14.06
3
30.11
26.43
21.3
4
40.11
34.86
28.52
5
50.23
42.67
34.93
6
60.36
52.25
42.52
7
70.45
61.09
49.9
8
80.02
69.74
57.12
9
90.36
78.02
64.23
10
100.03
87.06
71.6
• After the tenth time, sprocket number 1 was removed and sprocket number 2 was
connected to the engine flywheel and the same procedure was done and time was
recorded.
• Lastly, sprocket number 2 was removed and sprocket number 3 was connected to
the engine flywheel and the same procedure was done and time was recorded.
As the diameter of the sprocket changed from smaller to bigger, the speed
increased and the time taken to travel at a constant 10-meter distance was reduced
as shown in Fig. 18.6.
Time taken for a distance of 10 m with different sprockets is as follows:
• 1. 101.29 mm (d) = 100.03 secs
• 2. 138.97 mm (d) = 87.06 secs
• 3. 171.91 mm (d) = 71.6 secs.
Therefore, sprocket number 3 with a diameter of 171.91 mm was found to be the
most effective.
18.4.3 Propeller Analysis
• Length and width of the original propeller blades connected together with aft
sprocket was measured and recorded.