2. Luoto - the final destructive test is only completed at the end of the life cycle tests. So the wing set in question would have completed as many cycles as any aircraft achieves in service...then failed at 147%
Not being a test engineer but an engineer all the same Are you sure about this??
I thought that you had to destructively test a "virgin" as well as a full cycle piece. Didn't the Comet problem occur because a full cycle fuselage was used for the pressure tests and the subsequent "work hardened" fuselage passed the tests only for the relatively low cycle in service fuselages to fail? Or did I get the wrong end of the stick?