Re: Screw size and speed

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

At 09:28 22-07-99 EDT, SFreihof@aol.com wrote:
>In a message dated 7/21/99 7:10:22 PM Eastern Daylight Time, 
>deverett@idx.com.au writes:
>
><< 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. >>
>
>Good to know.  Thanks for the info.  Any other design parameters?
>
I've ordered a book on ducted fan design for a project I'm working on. The
site is:
http://www89.pair.com/techinfo/MassFlow/ductbook.htm

A few of the chapters are online and that's where I got my info about the
tip shape. While it's really directed towards air I think most of the
information would translate to water as well.

Dave Everett.