Introducing the Author, the Chairman said We have a very important lecture tonight before our annual dinner, this being one of the principle evenings of the year Commandant BORIS has been good enough to come to give us a Paper which I think will stimulate a good deal of discussion We can listen to him with much respect, for he is a man with enormous flying experience—some 6,000 hours total, with 400 hours in helicopters He is managing director of Hehcop-Air, which is Hiller’s representative in Europe He had a considerable number of racing successes in light aeroplanes in his early flying days, and during the last war he had a very distinguished aviation career, which is shown by the fact that he has the honour of being a Member of the Most Excellent Order of the British Empire a well as being an Officer of the Legion d’Honneur with the Croix de Guerre, the Resistance Medal and many other distinctions