On Thu, 26 Feb 2004 19:25:26 -0800, "Tarver Engineering"
wrote:


"Phil Miller" wrote in message
.. .

Robert is being rediculess to claim that a pitot tube produces some total
pressure and then the static port pressure is subtracted twice to make IAS.
The whole point of using a static port is to be able to take the guts out of
a pitot tube and produce only pitot pressure, thus increasing the
reliability of the system.

Perhaps this will help:

Yes that does help, because what Robert said and what Gord said are
practically identical.

"Gord Beaman" wrote in message
. ..
Hang on here a second now Jim, you still need two samples. As Dan
says you need 'static pressure' to read the altitude from and you
need 'pitot pressure' (ram air pressure) as well as the static
pressure to derive the airspeed reading from.

On Thu, 26 Feb 2004 21:06:41 GMT, Robert Moore
wrote:

The Pitot Pressure from the Pitot Tube is a combination of Static
and RAM pressure. The bellows inside the airspeed indicator
uses the ambient static pressure from the static port to cancel
out the static component from the Pitot Tube leaving only the RAM
component to move the airspeed needle.


Phil
--
Great Tarverisms #2

What is the best selling beer in Oz?

Budweiser.

Another illusion shattered.

John

alt.disasters.aviation
18 August 2002