In Case You Missed It
Build Your Skills: Metal, Part 2
How to meld with metal and bash rivets without blood or tears; by Dan Checkoway.
Understanding Experimental Light Sport Aircraft
Dave Martin explains the different designations of factory-built and Experimental Light Sport Aircraft and how they continue to evolve.
Wind Tunnel
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.