‘Head‐Up’ Flight Information Display and Visual Flight Simulator: Details of the System Developed at the R.A.E., Farnborough

TWO of the most exacting requirements made upon the pilot who is flying his aircraft on instruments are: (i) ability to make a sudden change of visual focus from a set of dials positioned only a few feet away to outside objects to all intents and purposes at infinity, and (ii) to monitor all of the basic flying instruments while concentrating on the principal one which is usually some form of artificial horizon. The two criticisms of conventional techniques may thus be regarded as visual inaccessibility and duplicity of dials.