A little while ago I was out with my Mooney M10 with a Continental C90 on a beautiful sunshiney Florida day. I just happened to glance down at the vacuum gauge and before my eyes, it went from 6 to 0. I continued my scan and the artificial horizontal gradually rolled about 60 degrees. Since it was a nice day, all I had to do was look out the window but I could envision a dark night or crappy weather where this could be an issue.
I decided to fix the problem. With a 337, we pulled out the entire vacuum system, pump, filter, regulator, and hoses. I had two Garmin G5s installed as Horizon and HSI (they are certified) so I have redundant AHRS and feel good about that. There is an alternative that is way less money. Dynon makes what they call a D2, portable panel. It is GPS based and is a battery powered EFIS. It gives you horizon, heading, altitude, ground speed, rate of climb, etc. It's about 4 inches square and is rechargeable.
I do not work for Garmin or Dynon. Just wanted to share some cool stuff.
