Subject: Boundary Layer
From: Rotary Engine
Date: 1/29/2007, 2:43 PM
To: AARotary Engine




    Here are two pictures of a very fast Tailwind  built by Red Hamilton
    that I have taken from the Tailwind list.  I am sure they don't mind.
      The first photo shows an angled intake which did not work because it
    was in the boundary layer. There was NO increase in MP.    The second
    photo shows the improved intake which produced .4"Hg more MP.  In the
    second example, the prop clears the intake by only  1/2 inch.

      I was surprised that the boundary layer formed so fast in the
    buffeting
    air coming off of the prop.     It is something we need to keep in mind
    when building the belly inlet for our rads and oil coolers.

    Jerry


No pictures here..


Matt-


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