8 Featured Plane
The Cessna 170A: A Piece of History

18 Avionics
Intercoms: Affordable Quality

24 Sky Talk
Can’t Go Back

26 How Your Airplane’s Electircal System Works

36 Fine-Tune Your Fuel Injection
How to Inspect, Test, and Maintain Injector Nozzles

39 uAvionics skySensor

46 Hangar Tip
Show Us Your Plane: Annual Calendar Just Around the Corner