The CHAIRMAN, in introducing the first of the two lecturers, said that Redifon, Ltd, to whom Mr HILL was Sales Manager, were very active in connection with the use of the flight simulator as a training aid to pilots Mr Hill was very well known to members, being a Founder Member and a Vice-President of the Association For many years he had been Chairman of the Council He was Sales Manager to the Flight Simulator Division of Redifon, Ltd, and he had held a pilot's licence for both fixed and rotary wing aircraft since 1936 He was commissioned in the General Duties branch of the Royal Air Force in 1941, and served with 1448 Flight and 529 Squadron (Meteorological Flight) After the war he was Air Adviser to British Electric Traction, Ltd, from 1947 to 1950, and he had the distinction of holding the Royal Aero Club's certificate No 8 He was well qualified to speak on this important topic

The CHAIRMAN said that it was hardly necessary for him to introduce RAOUL HAFNER who was well known in the helicopter world as Igor Sikorsky or Frank Piasecki He had been engaged in this field for many years and had very many successful designs to his credit His work as Chief Helicopter Designer to the Bristol Aeroplane Company had realised its present climax in the successful flights of the Bristol 173, about which he was going to speak tonight

The Chairman announced that Mr HAFNER had prepared his paper as a joint paper between the Association and the American Helicopter Society Mr HAFNER had been invited to present it to the latter Society on the occasion of their Annual Forum m April The lecture would therefore not be published until it had been delivered in America