One of the videos I saw of the test planes appeared to be well above 60 degrees. Agreed, not vertical, but far more vertical than a standard airliner. Also, the

One of the videos I saw of the test planes appeared to be well above 60 degrees. Agreed, not vertical, but far more vertical than a standard airliner. Also, they only maintain the aggressive angle of attack for a very short time, which may lead credence to an engine stall, or an imminent engine stall.