drag gear 中文意思是什麼
drag gear
解釋
拖拉機構-
Whereas many taildraggers can afford to use non - retracting gear with minimal impact on performance, planes with nosewheels almost always require retraction mechanisms to reduce drag
另一方面，固定式后三點起落架耐沖擊性能較強。而前三點起落架，需要收放式以減小飛行時的阻力。 -
The mechanism consists of a steering gear box, pitman arm, drag kink, tie rods, steering arms, and steering knuckles, the latter supporting the front wheels
該機構由轉向器，轉向垂臂，縱拉桿，轉向橫拉桿，梯形臂和轉向節構成，轉向節支承著前輪。 -
Those sensitive parameters making system have negative damping and occur self - excited shimmy are horizontal pulling lever rigidity, tire sideslip rigidity, steering gear rigidity and damping, kingpin equivalent damping, kingpin caster angle, tire drag. and wheel center distance, tire side rigidity, vehicle wheel unbalanced mass, tire vertical rigidity, and distance from kingpin center to the vertical central line plane of tire have great influence on shimmy, but they do n ' t make the system have negative damping. and horizontal pulling lever damping, suspension damping and rigidity have very small influence on shimmy
橫拉桿剛度、輪胎的側偏剛度、轉向機剛度、轉向機阻尼、繞主銷當量阻尼、主銷后傾角、輪胎拖距是影響擺振的敏感性參數，適當調節某一參數可引起系統的負阻尼，使系統產生自激擺振；輪距、輪胎側向剛度、車輪上的不平衡質量、輪胎垂向剛度及主銷延長線與地面交點至車輪平面的距離對擺振的影響也較大，但不會使系統出現負阻尼；而橫拉桿阻尼、懸架阻尼與懸架剛度對擺振的影響很小。 -
The gear are usually relatively lightweight, and the two main gear can also be easily encased in streamlined fairings to produce low drag in flight
后三點起落架通常重量都比較輕。兩支主輪子可以配置整流置用來減小飛行中的阻力。
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