…The blade angle is large at the base, and the circumferential distance of one revolution is small, but the pitch is almost the same as the pitch at the tip (Figure 4). A blade whose pitch is exactly the same from the base to the tip is called a uniform-pitch blade. In an actual propeller, the air speed at the base is slower than the flight speed due to the presence of the fuselage, so the pitch is made slightly smaller than that at the tip. … *Some of the terminology that refers to "uniform pitch blades" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…羽根角は根もとで大きく,1回転する円周距離は小さいが,そのピッチは先端断面のピッチとほぼ同じである(図4)。ピッチが根もとから先端までのどの部分でも正確に等しい羽根を一様ピッチ羽根という。実際のプロペラでは,根もとの断面へあたる空気速度が胴体などの存在によって飛行速度より小さくなるため,そのピッチを先端よりやや小さめにする。… ※「一様ピッチ羽根」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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