Designer's Notebook

How are your cylinders doing? A differential compression test can uncover any problems-almost before they start. Steve Ells explores what the results mean, and what to do about them.

Each time you install a fastener on your airplane kit, consider whether the head...

EI Commander helps keep you aware of both whats happening with your engines electronic ignition and, as importantly, why. By Marc Cook.

While new electronic flight instrument systems (EFISes) sometimes seem ubiquitous, PC Avionics new yourGlassPanel line stands out as an easily retrofittable blend of form and function that may fit the bill for homebuilders seeking a moderately priced primary or backup EFIS; by Marc Cook.