2) One of the early propeller planes (a Ford Tri-Motor, I believe) had three engines, one directly
in the middle and one on each wing. In this configuration, the plane can fly one with any two
engines or the just the middle one alone. Assuming the reliability of each engine is 0.9, what is
the reliability of the overall plane? Which is safer, the 4-engine configuration discussed in class
or the DC3?
This question for in industrial engineering (IE419) work design course.
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