Inertia coupling

With inertia coupling is referred to an instability in aircraft whose mass is concentrated around the longitudinal axis in conjunction with a too low directional stability.

For the first time she joined the Mach -2 technology demonstrator on X3 Stiletto, but has not been recognized as such herein. Fatale impact it had at the Crash series of early North American F - 100 Super Sabre, here you had the wings and the vertical tail for the highest possible speeds reduced and extended the hull. The shortened fin and the long fuselage led to a coupling of roll and yaw moments ( turning roll moment ). As a countermeasure, the wingspan and vertical tail was enlarged and thus the inertia coupling effectively avoided. The inertial coupling makes itself as uncontrolled wobbling motion about all three axes noticeable, which can quickly lead to overloading of the structure. Sufficient directional stability, tip tanks on the wing tips or aileron damper and a low-lying tailplane to counteract it. Another stability problem is the Dutch Roll dar.

• Flight control