In Case You Missed It
Wind Tunnel
Aerodynamic flutter has been a recent concern in the homebuilt world. What exactly is flutter? What causes it? Barnaby Wainfan clarifies an often misunderstood and potentially dangerous phenomenon.
![[Credit: Viking Aircraft Engines]](https://www.kitplanes.com/wp-content/uploads/2026/04/engine.jpg?w=324&h=160&crop=1 "Editor’s Log")
Editor’s Log
A wide-ranging look at the myriad engine choices facing today's homebuilt aircraft builders, designers, and pilots.
Light Stuff
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.