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aerodynamics - Why is an air intake located on the root of the tail on some aircraft? - Aviation Stack Exchange
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File:Air intakes of RAM air for environmental control systems of Boeing 747-8I.jpg - Wikimedia Commons
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Fahad Naim - (B787)✓The ground cooling valve lets air go through the ram air circuit and across the heat exchanger. - This air cools the nitrogen generation system (NGS) air when the
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