TE probe installation

On Friday, December 5, 2014 11:26:06 AM UTC-5, 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.

The pitot does indeed have an absolute pressure equal to local static pressure plus dynamic pressure. An airspeed indicator compares this to static, so far all intents and purposes, static pressure is meaningless.
A FLOW type variometer uses TE pressure(Pitot x -1) to compensate the variometer for velocity change. Static is not a factor.
In transducer type varios, there is no flow. These devices use pitot compared to static, and TE compared to static to get a similar result. Some others do not use TE pressure and derive required input by inverting pitot signal electronically.
For most folks it is good enough top take this stuff on "faith". It does work.
UH