[Data source - G3X Touch flight log, GTN650xi data log]
I have been chasing an apparent static system "problem" which results in erroneous readings in IAS/TAS.
I flew a number of GPS tracks following the test procedure detailed in Kit Planes, NTPS, etc. and come to the realization that my TAS as reported by Garmin G3X Touch is in error by >5kts.
I then spent time looking for pitot/static leaks (none found), but something interesting did show up in the data wrt Baro/Altimeter/Altitude data.
If WAAS GPS (C146), xDOP, VFOM are to be believed - my aircraft was 500ft Higher than what is indicated on the G3X (7000ft vs 6500ft).
This difference in altitude became larger as the aircraft IAS increased & altitude increased.
This data isn't 100% yet, more to be done - but I thought I should post this if you too are looking for discrepancies in your pitot/static system.
I have been chasing an apparent static system "problem" which results in erroneous readings in IAS/TAS.
I flew a number of GPS tracks following the test procedure detailed in Kit Planes, NTPS, etc. and come to the realization that my TAS as reported by Garmin G3X Touch is in error by >5kts.
I then spent time looking for pitot/static leaks (none found), but something interesting did show up in the data wrt Baro/Altimeter/Altitude data.
If WAAS GPS (C146), xDOP, VFOM are to be believed - my aircraft was 500ft Higher than what is indicated on the G3X (7000ft vs 6500ft).
This difference in altitude became larger as the aircraft IAS increased & altitude increased.
This data isn't 100% yet, more to be done - but I thought I should post this if you too are looking for discrepancies in your pitot/static system.