‘Active Control Technology’ (ACT) is a jargon of the last few years describing the technological requirements which permit the earlier concept of the Control Configured Vehicle (CCV). The CCV idea was that by suitably driving specially arranged controls, various desirable aircraft characteristics, notaby stability and good handling, could be provided synthetically and as a result the tail and fin sizes could be reduced and the wing mounted in a more advantageous position on the fuselage: more freedom of choice was thus given the designer in settling his configuration. The technology to do this was barely ready at the time but meanwhile has been progressing apace in the form of minicomputers, electrical signalling, digital control systems and a deeper analysis of what is involved in a total system.