Discussion
Which of the following is NOT an advantage of integrally machined skin-stringer panels?
Answer: B
Correct answer: Damaged stringers can be unbolted and replaced individually
That is exactly what an integrally machined panel gives up: skin and stringers are one piece of metal, so a damaged stringer cannot be removed and the repair is far more difficult than on a built-up panel. The advantages accepted in exchange are fewer parts, no fastener holes to start fatigue cracks, and a smoother external surface.
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