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Aviation History
1953
1953 - 1331.PDF
FLIGHT, 2 October 1953 487 THE ANGLO-AMERICAN CONFERENCE of mechanical or electrical systems. Finally, Mr. Rhode discussed the extent of fatigue cracking and loss in strength in relation to crack detectability and structural redund ancy. Redundancy, he argued, did not neces sarily provide safety, but structural arrange ments having intrinsic safety by virtue of de tectable appearance of cracks before serious loss in strength occurred, were possible. Discussion.—MR. WALTER TYE (A.R.B.) was the opening speaker in the general discus sion which followed the lecture. He outlined the experience of the Air Registration Board with fatigue problems, stating that the Board possessed statistics for many different aircraft types and routes. DR. T. P. WRIGHT (I.A.S.) referred to the effect of publicity concerning fatigue on the morale of the air-travelling public, and to gust alleviation which was a good thing if aimed at the fatigue problem. MR. R. H. SANDIFER (Handley Page) en quired whether gust frequencies differed be tween night and daytime values. The mixing of different materials in redundant structures should be avoided, he thought. The argu ments for the use of redundant structures and more concentrated structures were compared by DR. P. B. WALKER (R.A.E.) with, respec tively, falling downstairs and falling off a cliff. The choice was obvious, yet he did not really wish to fall downstairs—neither did he wish to fly in a cracked aeroplane. DR. H. F. WINNY (Fairey Aviation) asked whether novel design features such as powered controls had influenced fatigue properties. The variation in the number of gusts experienced with change of height was greater than the lec turer indicated, claimed MR. J. TAYLOR (R.A.E.), quoting his unit's records, and there seemed htde advantage from this point of view in flying higher than 20,000ft. Airline opera tors measured their aircraft's lives in years, submitted MR. J. F. M. ORAM (Bristols), and higher block speeds meant that a greater num ber of gusts would be experienced in, say, a ten-year life. ANGLO-AMERICAN ACCORD AT THE DORCHESTER: The dinner and dance which closed the Conference was a particularly enjoyable social occasion, and it also gave our artist the opportunity of selecting, as his subjects, 15 delegates widely known and respected on both sides of the Atlantic.
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