失事飞机的几点观察(2)

昨天发了个帖子：

https://bbs.wenxuecity.com/currentevent/2737815.html

今天再增加一点材料。首先是另一个角度拍摄的坠落视频，可见不是垂直的：

https://twitter.com/ChinaAvReview/status/1505856305495351296

 

另外根据FlightRadar24数据（见后），利用垂直速度和飞行方向速度计算了各个时间点的攻角：

画成图的话：

似乎可以看出飞行员一直在努力拉起，但未能奏效。

FlightRadar24的原始数据。据网上的说法，其中的speed是飞行方向的速度，单位是节。而vspeed是垂直方向速度，单位是英尺/分钟：

红米2019 发表评论于
对于中间机头仰起，有人提出另一种解释：飞机进入俯冲之后，速度逐渐增大，产生了额外的升力，所以机头逐渐仰起。之后速度又下降，飞机再次进入俯冲，直到撞地。

问题在于速度的增加是驾驶员人为的，还是仅仅由于重力的原因，自动的？
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