An Investigation of Multi-Axis Isometric Side-Arm Controllers in a Variable Stability Helicopter(Etude de Systeme de Controle Lateral Isometrique a Axes Multiples a Bord d'un Helicoptere a Stabilite Variable).

Several helicopter control configurations, each incorporating a pair of multi-axis, isometric side-arm controllers, were evaluated in a flight test program using a variable stability helicopter. The test aircraft was the NAE Airborne Simulator, an extensively modified Bell Model 205A-1, and the evaluation flights encompassed a wide range of demanding tasks from hover manoeuvering and transitions to cruising flight, to nap-of-the-earth flight and precision IFR tracking. The isometric control systems included several two-handed and one-handed configurations with force pedals for directional control, and one fully-integrated system which provided full control of the helicopter with either hand. Evaluations of these unconventional systems were performed by five experienced test pilots. Author