Re: about the 777 jet liner

From:         David Lednicer <>
Date:         19 Jan 95 22:18:56 
References:   1
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	The "cables" that you saw are really tubes, for the trailing 
static sources.  These are used in flight test to get a REALLY accurate 
measurement of the atmospheric static pressure.  The idea is to measure 
the static pressure at the aircraft's altitude, but without the influence 
of the aircraft.  In this way, the aircraft's airspeed and altimeter 
system can be calibrated and flight test data can be accurately reduced.

David Lednicer             | "Applied Computational Fluid Dynamics"
Analytical Methods, Inc.   |   email:
2133 152nd Ave NE          |   tel:     (206) 643-9090
Redmond, WA  98052  USA    |   fax:     (206) 746-1299