"Mary Shafer" wrote in message
...
On 18 Jan 2004 08:08:50 GMT, (B2431) wrote:

From: "Gord Beaman" )
Date: 1/18/2004 12:48 AM Central Standard Time
Message-id:

(B2431) wrote:



OK, I see where you are coming from. The pitot pressure DOES vary by
altitude.
To compensate for that when measuring airspeed you use static pressure
to
give
you altitude. Some aircraft detect static pressure from holes on the
side of
the pitot tube and others have the static ports located elswhere.

But you need BOTH Dan, you cannot measure airspeed AND altitude
unless you have BOTH pitot pressure AND static pressure...

That's what I said.

Did you also say that you can't correct them without OAT, outside air
temperature? That's the third element of a pitot-static air data
system.


Yes, but would you believe that this whole squabble began by trying
to correct Tarver's misconception that the "Total" fitting of the two
fittings on an air data computer (labeled Static and Total) referred to
two or more pitot gizmos (Tarver hates to call them tubes) instead
of altitude pressure plus impact pressure?

JK