Greenley
Well Known Member
Planning GRT HXR's with dual AHRS's for my RV-10 panel, and thinking about backups. One option is a pitot/static/AHRS unit like the trutrak Gemini PFD or the new GRT mini, the other option is something like the Dynon D1/D2. The first would give me pitot/static driven airspeed and altitude, the other GPS driven. I understand the pitot is normally better, but when would I use the backup, obviously one time would be if the both HXR's or both AHRS failed, they will have battery backup, so I think this would be quite rare. Another time a backup would be nice is if a pitot or static clogs, in that case while normally less accurate it seems like the GPS driven unit might be better.
Any thoughts?
Any thoughts?
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