障碍物对飞机起飞重量的限制规律

摘要

为了分析障碍物对最大起飞重量的限制规律，以某型民用运输机为例，给出了计算障碍物限制重量的方法，对不同环境因素下，该重量的变化情况进行了分析，得到了各因素对障碍物限制重量影响的规律。结果表明：障碍物限制重量随障碍物距离和障碍物高度的增大而增大，增大趋势均为先急后缓；大气温度高于30℃时，每增加1℃则障碍物限制重量线性下调0．82％～0．87％，其下调比例随调整前重量的增大而增大；气压高度大于海平面高度时，每增加1 km 则障碍物限制重量需线性下调约10．9％，其下调比例与调整前的重量无关；障碍物限制重量在顺风时随风速增大而线性下调，在逆风时随风速增大而线性上调，但顺风时调整比例大于逆风时调整比例，且调整比例均随调整前的重量增大而减小，减小趋势为先急后缓。%To analyze the limitation of obstacles on maximum takeoff weight,the calculation method of obstacle limit weight (OLW)for a civil transporter was presented,and the effect of various environment factors on OLW was analyzed.The results show that:obstacle limit weight increases first sharply and then slowly with obstacle height and distance;when the outdoor air temperature is over 30 ℃,OLW decreases linearly by 0.82%/℃-0.87%/℃ and its reduction rate increases with OLW;when the pressure altitude is higher than the sea level,OLW decreases linearly by 10.9%/km and its reduction rate is unrelated to OLW;with the wind velocity increasing,OLW decreases linearly for tailwind and increases linearly for headwind,and both the decline rate and the growth rate decrease with OLW first sharply and then slowly.