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When the sky is at your feet and the earth is at your head

submitted by SFOGuy

7 years 6 months 3 weeks ago

This is pretty poor video quality---too bad it's not HD.

So, this is not a simulator; it's in-cockpit footage from the actual deliberate stall testing of Boeing's last version of the 717---what most of us know as a the DC-9 (this variant flew in 1998--last produced in 2006--so, actually, a pretty "young" aircraft).

It was a deliberate test of a particular sort of mishandling of the aircraft---one in which they modeled what would happen if a ham-handed and misinformed pilot stalled the aircraft ---having already run out of "control authority" on the way into the stall.

Apparently, because the DC-9 uses ailerons with trim tabs that pushed them around---and spoilers on the wing to control roll---a clueless pilot could make everything much, much worse at the moment of the stall---as a wing dropped away to one side and it rolled inverted (thus, the earth at your head and the sky at your feet...)--the ailerons having become ineffective and the attempts to control roll with the spoilers just accelerating the stall on one side and the resulting wing-drop.

I wonder how many Gs they pulled coming out of that? and how much altitude they lost?