John Slade wrote:

I notice the maximum pressure recovery is .86 for these ducts.

What does that mean to us in real terms?
John Slade, Cozy MKIV #757, progress: http://kgarden.com/cozy
West Palm Beach, FL

That means if you are going 100 MPH the dynamic pressure is 
26 pounds per square foot or .18 psi. So 86% of the that is
.15 psi. It is 86% of what every the dynamic pressure is.
That is why ducts are described in pressure recovery terms.

Paul Lamar
 
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