Nozzles (Page 1) - The Propeller Pages

How a Marine Nozzle Works
To obtain the most thrust, a propeller must move as much water as possible in a given time. A nozzle will assist the propeller in doing this, especially when a high thrust is needed at a low ship speed. As we already know, as the propeller blades rotate in the water, they generate high-pressure areas behind the each blade an ...

Marine Nozzle Tests
Trawlers To demonstrate the difference in design efficiencies, tests were conducted using (3) 72 foot trawlers of 375 Hp @ 1800rpm with 6:1 reduction gear each performing the same work. One was fitted with an open propeller, one with a Kort nozzle and a Kaplan propeller, and the third with a Rice Speed Nozzle and Rice Skewed Kap ...

Rice Speed Nozzles more efficient than Kort 19a Nozzle
Speed Propeller Nozzles by RICE The most advanced Propulsion System* The Test: To demonstrate the advantages of the Rice Speed Nozzles over the 19a Kort Nozzle and Open Propeller, a series of tests was performed. Three 72 foot Trawlers of 365 Hp, 1800 RPM with 6:1 reduction gear, each performing the same work, wer ...

Rice Thrust Nozzles for Tugs
Rice Thrust Nozzle Profile * U.S. Patent no. 5799394 The Rice Thrust Nozzle* is replacing the Kort Nozzle type 37 around the world because its hydrodynamic shape produces less drag and better performance. Designed for Tugs, the unique shape works to maximise both forward and reverse thrust. A Rice Noz ...