The HSP 4 & 5B propeller is a highly skewed propeller designed for applications that require low noise and vibration. This propeller can cut stern vibration levels by as much as 40% therefore reducing cabin noise. The HSP-3B & 4B propellers are similar in design to the HSP-5B in reducing vibration and cabin noise. Blade area is increased on 4 and 5 blades to accommodate higher powered vessels.
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