Jisho

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(航空機)
Wikipedia definition
1. Spoiler (aeronautics)In aeronautics, a spoiler (sometimes called a lift dumper) is a device intended to reduce lift in an aircraft. Spoilers are plates on the top surface of a wing which can be extended upward into the airflow and spoil it. By doing so, the spoiler creates a carefully controlled stall over the portion of the wing behind it, greatly reducing the lift of that wing section.
Read “Spoiler (aeronautics)” on English Wikipedia
Read “スポイラー (航空機)” on Japanese Wikipedia
Read “Spoiler (aeronautics)” on DBpedia

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