PropScan is a computerized pitch measuring assembly that enables propellers of any type to be manufactured to the highest possible accuracy. It ensures radial pitch accuracy (measures propeller pitch to within ±0.004”) and blade surface geometry is consistently and continuously measured using a probe. The probe rotates over the blade surface and the measured pitch data for every degree of rotation are captured and send directly to the computer for detailed analysis. Propellers can be manufactured to a higher “Class” of accuracy as per defined by ISO 484/2 –1981 (E). Below is a table showing the tolerance of different “Classes”
Class |
Manufacturing Accuracy |
S |
Very High Accuracy |
I |
High Accuracy |
II |
Medium Accuracy |
III |
Wide Tolerance |
| Designation of Pitch |
Class |
| S |
I |
II |
III |
| Local Pitch |
±1.5% |
±2% |
±3% |
- |
| Section Pitch |
±1% |
±1.5% |
±2% |
±5% |
| Mean Pitch per Blade |
±0.75% |
±1% |
±1.5% |
±4% |
| Mean Pitch for Propeller |
±0.5% |
±0.75% |
±1% |
±3% |
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Advantages of using PropScan
- Reduce vibration. Smoother, quieter vessel operation.
- Increased speeds throughout the full rev range
- Increased fuel efficiency
- Reduced cavitation
- Synchronized engine performance
- Comparison of data to previously documented measurement.
- Pitch accuracy reporting guaranteed to meet required ISO class pitch tolerances
- Reduced inconsistency of pitch between blades.
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