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PRODUCTS>HJ3 Nozzle>Advantages

Steerprop HJ-3 High Performance Nozzle
Combining High Bollard Pull with Free Running Efficiency
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The test nozzle during installation

Advantages of the HJ-3

  • Bollard Pull
    The increase in bollard pull of HJ3 is 8-10% compared to standard type nozzles, e.g. the 19A.
  • Free Running
    The increase in maximum efficiency is 10-15% compared to a 19 A nozzle. However, more important is the behavior in over-optimal condition, where the efficiency collapses at flow separation on the nozzle back. This is very important for tug boats, where the propeller has to be designed for maximum bollard pull and thus operates in over-optimal conditions in free running.
  • Azimuth Propulsor Steering
    The propeller is situated in the diffusor part of the nozzle, comparably far aft. This enables the nozzle to be installed close to the pivoting axis of the propulsor, minimizing steering torque.