The Use of Wind Tunnels in the Study of Problems in Industrial Aerodynamics

I am going to restrict myself to consideration of those problems which arise from the natural wind, and I am going to begin—and perhaps also to continue—with what may be, to paraphrase one of our Chairman’s expressions, some offensively simple . considerations. I do this because, in our studies of industrial aerodynamics, we are increasingly applying the sophisticated techniques developed from years of aircraft aerodynamics; and there is always a danger that, unless we go back to fundamentals, we may invoke a theorem or technique from aircraft practice which is inappropriate for an industrial problem. First of all, therefore, I shall go back to square one.