Re: Screw size and speed

[Dave Everett <deverett@idx.com.au>]

At 16:28 21-07-99 EDT, VBra676539@aol.com wrote:
>
>It's only a Kort if the prop is shaved to a "square" tip and the clearance 
>between tip and nozzle ring is minimal (like a sixteenth or so). They use 
>these things a lot on big torque ships (tugs and the like). Most information 
>I have seen is from pump manufacturers who often use this sort of thing for 
>lift pumps in the groves down here. I'll ask around for sources.
>Vance
>
In any ducted design, the blade tips should be flat. A normal prop blade
slims down with a rounded end, You don't want this for a duct.

Dave Everett.