Rigidity of Wing and Tail Surfaces: Determining Stiffness by Calculation and Mechanical Test Available to Purchase

IN an earlier article dealing with the general aspects of clastic distortion phenomena, which appeared in an issue of Aeronautics, mention was made of the various factors which tend either to promote, or to damp out and eliminate the onset of the aerodynamic inertia elastic vibration phenomena known as flutter, and it was pointed out that in this respect the provision of an adequate measure of rigidity, both as regards to twisting and flexure of the wing or tail surface structure is one of the most effective safeguards against the occurrence of torsional‐flexural flutter.