High-Speed Waveless Screw

waveless · #1 08-05-2005, 07:10 AM

High-Speed Waveless Screw

What do you think about the new High-Speed Waveless Screw?

Leo Lazauskas · #2 08-05-2005, 07:43 AM

Quote:

Originally Posted by waveless

High-Speed Waveless Screw

What do you think about the new High-Speed Waveless Screw?

They are just drawings, like your design for a "waveless" boat. It does not mean that the screw is efficient, nor does it make your vessel "waveless".

RANCHI OTTO · #3 08-05-2005, 10:00 AM

In the past the Maierform Group has a patent concerning a system to avoid the turbulent flow caused from the propeller hub against the rudder.
This system named "Costa bulb" reduced the power btw. 3/3.5 % on large and slow ships. The shape of the bulb was the same but applied to the rudder near the prop's hub.

SailDesign · #4 08-05-2005, 10:10 AM

Some of the earliest screw propellers looked like that. None of the modern ones do. Is there a connection?

waveless · #5 08-05-2005, 10:56 AM

maximal propulsive area, minimal cut-in side!!!!!

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