I must depart at once from my script to thank Wing Commander BRIE for his kind introduction, and add that with such a formidable array before me my immediate reaction is to take refuge in a corner and re-write much of my little paper packing it with graphs, square roots and at least a mention of omega However, time does not permit this

As you know, this is a short paper outlining some experiences that have come my way while testing helicopters I hope I have been able to strike the right note, and that in my avoidance of “digging up” technical data and figures, the general facts are not too woolly