- Low air bottle pressure or air line valves may be shut
- Air bottle isolating valve or automatic valve or distributor malfunction
- Control air valves faulty or less control air pressure
- Start air valve jammed.
- Turning gear engaged or limit switch faulty.
- Bursting diaphram on start air line damaged.
- Fuel lever on manoeuvring stand not on remote mode.
- Not sufficient spring air pressure to shut the exhaust valve , there by causing loss of compression.
- Auxiliary blower not running or not on auto mode.
- No oil pressurr due to the exhaust valve being open or insufficient spring air pressure
- Start air distributer has not activated itz end stop valve
- Start air distributer piston is sticking.
- Start air distributer is wrongly adjusted
- Start air distributer control valve is sticking
- Cylinder air start valbe are defective or sticky
- Othet interlock - Aux blower , LO low pressure, CW low pressure
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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