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Sl. No | Solid / Fixed Pitch Propeller | Controllable Pitch Propeller |
1 | Speed of Ship is controlled by varying the speed of Engine | Speed of the ship is controlled by varying the pitch of the propeller |
2 | Engine with varying speed is required | Engine with constant speed is enough |
3 | Hence Shaft driven auxiliary cannot be fitted | Hence Shaft driven auxiliary can be fitted |
4 | Astern movement of the ship is by reversing the engine {engine should be of reversing type} | Astern movement of the ship is by varying the pitch of the propeller {unidirectional engine is enough] |
5 | Full power of the engine is not available during astern running | Full power of the engine will be available during astern running also |
6 | Hence Stopping time and distance is more | Hence Stopping time and distance is less |
7 | Manoeuvring in confined water is difficult | Manoeuvring in confined water is easy |
8 | Propeller efficiency is more | Propeller efficiency is less since large diameter boss/hub is required |
9 | Cost is low | Cost is high |
10 | Cost of repair and maintenance is less | Cost of repair and maintenance is more |