Tony Krzyzewski designed a non-invasive hydrostatic pressure fuel
quantity measurement several years ago.
A problem is that there is no obvious possibility for self calibration
once it is in operation. But then, sometimes things work better than
expected, sometimes worse.
I'm wondering how the pressure measurement has fared in practice?
Are people using it?
What size errors?
Suspected error sources - sensor and/or other variability?
Long term stability of the sensor?
Error modes - mostly offset or gain too?
Has a combination with one or two digital single level sensors been tried?
Might mechanically switching the sensor pressure input (break before
make) for a periodic 1-point recalibration be feasible (and useful)?
Grateful for any data and insights,
Jan de Jong
461, the wings
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