A program for an airborne digital control system

The program to be described is one used in an advanced phase of the flight testing of the Digitac system, an airborne automatic control system utilizing a digital computer. The purpose of the system is summarized. The configuration of the system and some specific components are mentioned. The computer and its order coding system are described briefly. The specific program and its code are presented in detail as far as permitted. Emphasis is placed on certain aspects which are interesting or unique and may be applicable to others in this field. Simplification of the program is made by means of block diagrams.