… S is the wing area (m2), q is the air dynamic pressure, i.e., the wind pressure per 1 m2 of frontal area at flight speed. Flight speed is v (m/s), and air density is ρ (kgs 2 /m 4 ), so q = ρ v 2 /2. C L is the lift coefficient, and C D is the drag coefficient (or resistance coefficient), and their values vary depending on the wing shape and angle of attack. If you plot a graph with the angle of attack α on the horizontal axis, the lift coefficient C L increases linearly, almost in proportion to α, from zero lift angle α 0 L until stall begins (Figure 2-a). … *Some terminology explanations that mention "drag coefficient" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…Sは翼面積(m2),qは空気の動圧つまり飛行速度での正面面積1m2当りの風圧で,飛行速度をv(m/s),空気の密度をρ(kgs2/m4)として,q=ρv2/2である。CLを揚力係数lift coefficient,CDを抗力係数drag coefficient(または抵抗係数)といい,その値は翼の形や迎え角で変わる。迎え角αを横軸にグラフをかくと,揚力係数CLは零揚力角α0Lから失速が始まるまで,ほぼαに比例して直線的に増す(図2-a)。… ※「drag coefficient」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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