My honest opinion would be that high velocity air doesn’t like sharp corners.  Tube bens are not that expensive – start with those.  And the welds, ah; are less than professional looking.  Make something that looks good, and you’ll find that it also works well.

Al G

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Steve Parkins
Sent: Friday, April 24, 2009 5:01 PM
To: Rotary motors in aircraft