In the decision process for our panel at Airventure this year I was concerned about the Trutrak ADI as a Chelton backup.  I posed the reliability question to Jim Younkin the design engineer who happens to have a Chelton in his RV10.   He said the reliability of their ADI with the Backup Battery is “one of the most reliable instruments he is aware of”. 

 

Considering Jim’s background, that is a powerful statement.  Also consider he knew I was a prospect for a Sorcerer AP and is no doubt biased.  I bought the ADI with the Backup Battery and the Sorcerer.

 

Maybe the answer is a backup for the backup…..I have a Garmin 396 and have practiced with the AI enough to know it works.  If the backup to the backup fails?  To quote Marlon Brando, “it’s not your night”.

 

Steve Colwell   Legacy in primer