If you gathered 100 pilots in a room and asked for a show of hands who likes their aircraft’s vacuum system, you probably wouldn’t see any. Yet the lowly and disrespected vacuum pump soldiers on for plenty of instrument panels not converted to all electric.
For portable backup, Dynon’s Pocket Panel portable EFIS series has historically been a decent seller, but the much improved current-gen model D3 EFIS has plenty of competition from app-based backups and AHRS-equipped portable ADS-B. I’ve been flying with the latest Pocket Panel in my Piper Cherokee Six and prepared this field report.