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Unformatted text preview: possible design flaw while the Abell Committee[N 19] met to determine potential causes of the crash. Before the Elba accident, G-ALYP had made 1,290 pressurised flights and at the time of the Naples accident, G-ALYY had made 900 pressurised flights. Dr. P.B. Walker, Head of the Structures Department (RAE) said he was not surprised by this, noting that the difference was about 3 to 1, and previous experience with metal fatigue suggested a total range of 9 to 1 between experiment and outcome in the field could result in failure. Thus, if the tank test result was "typical", aircraft failures could be expected at anywhere from 1,000 to 9,000 cycles. The final outcome Boeing entered the 707 and put de Havilland out of business...
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This note was uploaded on 12/05/2011 for the course MSE 4020 at Cornell University (Engineering School).