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Highlander · 04-16-2008, 10:40 AM

The plug connecting all the vanes may improve efficiency.
The hole in the center (in the version with out the plug) can leak pressure in a similar way that too much tip clearance in a jet design does.

Carl

04-16-2008, 10:40 AM	#33
Highlander Registered User Join Date: Sep 2007 Location: Milford Boat Works CT Posts: 37	Center Plug The plug connecting all the vanes may improve efficiency. The hole in the center (in the version with out the plug) can leak pressure in a similar way that too much tip clearance in a jet design does. Carl