Ed,

That is a very interesting design.  I look forward someday to trying to find ways to reduce cooling drag, rather than trying to find ways to increase cooling capacity.

I am about ready for the next test flight, probably tomorrow morning if the weather is good.  Way too hot today.  I was at the airport working on the plane this morning, and is was heating up pretty good by 9:00 AM.

 

Steve Brooks

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Ed Anderson
Sent: Saturday, June 12, 2004 10:28 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Emailing: MVC-036S.JPG

 

 A couple more photos of the Truncated Streamline ducts.  The volume of the duct with the smaller opening is filled with foam, so should that prove too small an inlet, the foam an easily be removed to opening the duct up to the same profile as the one with the larger opening - just in case {:>)

 

Its very interesting how the wall shape of the streamline duct "uses" the higher pressure profile (sort of like a bell shape curve - with the higher pressure toward the center axis of the duct) to resist the centrifugal force trying to move the airflow away (separate) from the wall.  This results in better pressure recovery than the older Sinusoidal shaped ducts which flexed the walls outward actually making the separation problem worst by distributing the pressure over a larger volume of space therefore reducing its effectiveness in preventing flow separation at the wall.

 

 

 

Ed Anderson

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