EFISes provide a tremendous amount of information and extend the capabilities of todays homebuilt aircraft, but only if you take the time to learn how to use them properly.
Stall flutter is the result of the elastic axis of a wings surface being aft of the aerodynamic center, resulting in instability. A vicious cycle of lift, twist, stall and lift may ensue.
The rules around Letters of Deviation Authority are labyrinthine, which helps explain why they are relatively rare. But the problems could be—and should be—corrected through a few regulatory changes. By Roy Beisswenger.
Electric motorgliders are leading the way in low-cost, fuel-efficient flight. In the second installment of his two-part series, Dean Sigler profiles seven designs at the forefront of this emerging field.