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Pneumatics Question
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June 7th 10, 05:54 AM posted to rec.aviation.soaring
ZZ
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Posts: 68
Pneumatics Question
On 5/25/2010 7:13 AM,
wrote:
On May 24, 9:32 pm, wrote:
Hi All,
Whenever I accelerate, my varios bump up and tell me I'm climbing,
then settle back to reality. Any idea of what I need to look for to
fix this?
My setup:
Kestrel 19, two static ports in the tail boom, pitot and TE in the
fin. The TE line is split under the seat using a Y connector and then
travels to two varios (a Winter mechanical and a 1990-era audio/final-
glide called a VariCalc). Pitot and static lines are split behind the
panel using T connectors.
I replaced all the non-permanent tubing last year and they all seemed
to be leak-free.
Thanks!
-John
Next question is do they go down when you pull up. If both events
occur, you are somewhat over compensated.
Depending on the type of probe, this may be able to be tuned.
UH
I agree with UH. If you accelerate AND descend the energy added to the
glider is virtually zero and the vario should read zero IF it is
correctly compensated. What you are describing in your original post is
classic TE overcompensation. If this is so, a pull up should produce a
negative vario reading, momentarily.
I realize this is theory and does not "find the leak" if there is one
but perhaps UH's comments will get you going in the right direction.
Good luck,
Paul
ZZ
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