Part Three—Flight Control System: Description of the Smiths Duplex System Designed to Carry Out ‘Autoflare’ as Well as a Range of Flight Director and Autopilot Control Modes Available to Purchase

AT the present day the operations of civil transport aeroplanes are severely restricted under conditions of poor visibility and not infrequently flights have to be diverted or cancelled. The work of the Blind Landing Experimental Unit of the Ministry of Aviation in the development of a system of automatic landing for military aircraft has been described elsewhere.1 A flight control system is described in this paper, which given the necessary azimuth guidance signals from ground based installations, will extend the advantages of automatic landings into the civil field.