“The development of air travel depends almost entirely on safety. One contribution to safety is the autogiro ‘plane. Although many of us have seen one, we believe this to be the first explanation of the machine’s working.” M/S of a man standing beside a Pitcairn PAA-1 autogiro. He speaks slowly and in a rather posh American voice about the working of the aircraft. Closer shot of the man as he uses a model of an “ordinary airplane” to illustrate how the autogiro is different. C/U of the model in his hands speaks of air pressure and how this keeps the plane in the air. C/U of the blades of the autogiro – miniature airplane wings. The man explains how the blades work automatically. The man then picks up a model of an autogiro and describes how the propeller provides forward motion.