iFly GPS Forum

The times I have seen it the event last only a couple of seconds. It would flash warning and I think I caught a extreme rate of descent. It would clear itself within seconds. I would suspect bad GPS data. I experienced this a few time on a trip from the SF Bay Area to Las Vegas a couple of weeks ago in my Grumman AA-1B, with a bubble canopy. Maybe better averaging the rate of climb or descent over an appropriate period of time would reduce this. I just upgraded to the iFly720 prior to this flight...

Yes,

This will happen if there is an extended period (several seconds) of incorrect altitude data from the GPS. But it should be rare. If you see this often I suggest you consider an external antenna. And we will look at increasing the buffer time before popping an alert.

Thanks,
Walter

I encountered it shortly after getting the 720 also in my bubble canopy Grumman AA1B on a 7 hour round trip flight from the Bay Area to Lost Wages (Las Vegas). It probably did it 5 or 6 times that I caught. I did not fly the 700 enough in the Grumman with the 7.5 load to say it did not happen there also. I also had just started flying using the Portait mode with the unit mounted on the yoke. My Vegas trip was under very smooth flying conditions, and I caught it happening when there was no movement of the yoke.

Love the portrait mode by the way.....