A hans device would not work in an aircraft, as to make the system work properly it needs specific belts to hold you and it in place,none of which will be certified of course - and then you also need the helmet to go with it . It is also rather awkward to get on and off, and generally is left connected to the helmet and the 2 are put on together. You also need a seat which is specifically shaped for the Hans , otherwise it feels uncomfortable sitting in a normal seat .