초록 ▼

The invention describes a supercavitating propeller with adjustable cup, and a method to adjust the cup. The trailing edge of the propeller blade is characterised by a protuberance with a limited section compared to the blade's section at the conventional trailing edge. The protuberance height can b

The invention describes a supercavitating propeller with adjustable cup, and a method to adjust the cup. The trailing edge of the propeller blade is characterised by a protuberance with a limited section compared to the blade's section at the conventional trailing edge. The protuberance height can be adjusted, hereby reducing the propeller blade's cup.

대표청구항 ▼

What is claimed is: 1. A marine bladed propeller comprising: a plurality of blades, each blade having a positive pressure side and a trailing edge at the separation of the water from the propeller in forward motion at the positive pressure side, the trailing edge including a cup portion and a protu

What is claimed is: 1. A marine bladed propeller comprising: a plurality of blades, each blade having a positive pressure side and a trailing edge at the separation of the water from the propeller in forward motion at the positive pressure side, the trailing edge including a cup portion and a protuberance, the protuberance having a smaller thickness than a thickness of the blade; wherein the protuberance has a height which extends a height of the cup portion to a total height at the positive pressure side. 2. The marine bladed propeller in accordance with claim 1, wherein said protuberance extends along the whole length of the trailing edge. 3. The marine bladed propeller in accordance with claim 1 wherein said protuberance extends along a portion of the whole length of the trailing edge. 4. A process to adjust the cup of a propeller comprising the steps of: forming a protuberance with a height in excess of a desired cup height; and reducing said height step by step untill a predetermined cup height is obtained. 5. The process of claim 4 wherein the reducing the height of the protuberance is obtained by a machining step. 6. The process of claim 5 wherein the machining step reduces the height of the protuberance along the entire length of the protuberance. 7. The process of claim 5 wherein the machining step includes the step of machining the protuberance along the blade tip in a variable manner with respect to the trailing edge of the relevant blade.