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Auxiliary Power Unit. A device for providing alternate power to an aircraft, usually located in the aircraft's tail.

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1 answer
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Why is the 787 tail cone made out of titanium?

In this question there is a drawing of a 787 that shows that the tail cone is made of titanium. Why is such a heavy-duty material like titanium required for the tail cone? I do not see how there co …
h22's user avatar
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