Airplane tail loads are difficult to determine accurately by means of model tests and theoretical analysis. In order to obtain reliable tail load data, it should be determined by flight tests.
用分析和模型试验方法难以确定可靠的尾翼载荷，所以要求通过飞行试验获取尾翼载荷数据，但因测载技术复杂，精确地测定尾翼载荷亦是困难的。
But it was a birdlike tail that really amped up the aerodynamics, dampening the drag from the body and wings, as well as boosting the lift that lags under vehicle weight and cargo load.
的确鸟儿尾巴一样的飞机尾部改善了空气动力学性能，缓解了机体和机翼的阻力，同时还大大的增加了向上的力，缓释了由于飞机本身和货物重量而产生的向下的力。
With material mechanics theory, expounded bolt tail subjected to no center load action and roof bolt broken mechanism while roadway was supported with bolts.
应用材料力学理论，阐明了锚杆支护时锚尾一定受到偏心载荷作用和顶板锚杆破断的机理。
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