fan-in-fin
Third-person singular simple present indicative form of misconjecture
A mullein (of genus {Verbascum)
plural of sparapet
Describing a helicopter's shrouded tail rotor, essentially a ducted fan, intended to counteract the torque of the main rotor.
ダクテッドファン式の尾部ローターは、メインローターのトルクを効果的に相殺し、騒音を低減して低高度での安全性を高めます。
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