FD disappears when pitch angle is greater than:
A.25゜nose up or 13゜nose down B.25゜nose up or10゜nose down C.20゜nose up or13゜nose down正确答案A
FD disappears when pitch angle is greater than:
A.25゜nose up or 13゜nose down B.25゜nose up or10゜nose down C.20゜nose up or13゜nose down正确答案A
