Walt
Well Known Member
After reading the chilling account of the Lancair accident in this months Sport Aviation I though I would throw out what I think is sufficent redundancy for real IFR. A single back up is not good enough as you still don't have a tie breaker so 3 always visible attitude indicators is the only real way to know which way is up.
Even though my G3X has 2 ADAHRS one could fail and not flag itself so its possible that you would continue to operate on a failed unit (like the poor Lancair soul did) without knowing there's a problem, so I'm not sure the dual ADAHRS buys you anything in that situation.
The Sandia Quattro 340 below is a very nice unit as the attitude indicator does not rely on either air data (which is normally present) or GPS to function reliably so it's a truly independent instrument with its own battery back up as well. (the Sandia was already slated for the spot it occupies before the G5 was announced)
The G5 in addition to performing back up functions adds some really nice features to the G3X system so I'm really enjoying it.
So between the G3X, G5 and Sandia I think I got my attitude covered
Even though my G3X has 2 ADAHRS one could fail and not flag itself so its possible that you would continue to operate on a failed unit (like the poor Lancair soul did) without knowing there's a problem, so I'm not sure the dual ADAHRS buys you anything in that situation.
The Sandia Quattro 340 below is a very nice unit as the attitude indicator does not rely on either air data (which is normally present) or GPS to function reliably so it's a truly independent instrument with its own battery back up as well. (the Sandia was already slated for the spot it occupies before the G5 was announced)
The G5 in addition to performing back up functions adds some really nice features to the G3X system so I'm really enjoying it.
So between the G3X, G5 and Sandia I think I got my attitude covered
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