FYI and I don't want to be a 'pita' but there is no such thing as a cavitation plate or anti-cavitation plate. It is an anti-ventilation plate.
When a prop is too high or lifted too high and it breaks loose, it is ventilating, not cavitating, in most cases. When cavitating, it will errode the prop. I have seens this on props with bent ears.
Anyway, I am not great at explaining things, so I am pasting something below to help us out....
- Ventilation - The introduction of surface or exhaust gasses into spinning propeller blades is ventilation. This phenomenon raises engine RPM and reduces the thrust generated by a prop. It can be caused by a tight turn, improper trim or a poorly mounted engine.
- Cavitation - The boiling point of water varies with atmospheric pressure. Water boils at a higher temperature at sea level than at high mountainous elevations. Water introduced to the vacuum of space would boil away immediately at very cold temperatures. A turning propeller blade creates an area of low pressure on the backside of the blade. Blades turning at excessive speeds can cause water to boil on their surfaces. The incorrect choice of propellers, damage caused to a prop, and vessel design faults are other factors that influence potential cavitation. Excessive cavitation mimics performance problems found with ventilation and can physically damage the propeller.
Engine Height
