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Originally Posted by tjts1
Aluminum is a very expensive material to build ca car out of. That why its only used in high end cars like top of the line Audis, Jaguar and Lotus.
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Plus the Honda Insight :-)
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This is why aircraft are limited to fixed number of lifetime flying hours. The aluminum structure simply loses its integrity with time.
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Where'd you get that idea? There's no such limit for aircraft in general. Though there are hour limits for some particular types, and for some parts on other types, these are generally the consequence of problems found when the aircraft is inspected. In fact there are a good number of planes from the '30s through '50s that have racked up high flying times, and are still flying. And most GA aircraft date from the late '50s through early '70s.