Some instruments have redlines; some do not. Odds are none will routinely read in the middle of the green.

by Ray Leis

While you are scanning your flight instruments closely as you cruise along, other instruments are recording what’s going on inside your engine, and your electrical systems. The instruments over in the other corner of the panel are are worth more than a glance, IFR, or VFR. If you don’t include them in your scan, how can you know if your aircraft engine is in good health? True, it’s running now, but the next question may be how long it will continue running as advertised. …