Without getting into the math (mainly because I don't remember any of
it), the TE probe delivers static pressure reduced by the suction effect
caused by the air flowing around the probe. Remember that the holes in
the TE probe are near the back and, according to Bernoulli (I think it
was), when the velocity increases around the probe the pressure is
reduced and vice versa.

On 12/5/2014 9:26 AM, Jim Lewis wrote:
Thank you JP. I'll dig into the info today.

Forgive me for this simple-minded question. What pressure (static, dynamic, total) is provided to the variometer by the TE probe? I have read that a TE probe must create a pressure inverse but equal in maginitude to the dynamic pressure at the pitot. This confuses me. I thought the pitot 'receives' total pressure not just dynamic pressure.

I do understand that a variometer is a flow meter that responds to the flow of air between a capacity and the pressure sensed by the static ports. Does the TE probe provide this static pressure (offset by changes in dynamic pressure created by the glider varying airspeeds) or is the TE probe providing dynamic pressure to its side of the variometer?

I am trying to understand the TE process without being able to actually measure the pressures involved.

Thank you.


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Dan Marotta