Re: 737 NACA inlet with moving parts?

From:         David Lednicer <>
Organization: Analytical Methods, Inc.
Date:         21 Oct 96 13:31:42 
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David K. Cornutt wrote:
> In article <airliners.1996.1651@ohare.Chicago.COM> Keir Wallace,
> writes:
> >The aircon pack inlets below the wing root also have articulated
> >doors on the 73 but rather than vortex generators they have slush deflector
> >doors, just to keep the parts count up. ;-)

	What you are looking at is the ECS inlet (air pack inlet) on the
737.  Usually, you throttle the flow into an inlet by changing the
exhaust area, but someone at Boeing decided to throttle the inlet
instead, which never works too well.  Lockheed made the same mistake on
the L1011 ECS inlet.

David Lednicer             | "Applied Computational Fluid Dynamics"
Analytical Methods, Inc.   |   email:
2133 152nd Ave NE          |   tel:     (206) 643-9090
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