Amazon Air MIA Runway Excursion

[MikeD]

It doesn’t look like an extra 1000 feet would have helped these guys.

Nor would an EMAS bed, even if it was a standard/minimum length one (most aren’t, most are shorter than minimum, sometimes significantly shorter). Even a BAK15 / 61QSII barrier, had one been large enough to catch a 767-size plane, would’ve been wiped out at their speed.

 

[Minuteman]

Doing some quick math:

• The distance from the departure end of Rwy 30 to the perimeter road is 435m (1430ft).
• The NTSB briefing states the ground speed was 50m/s (96kt) when the behavior of the accelerometers change (7 seconds before the end of recording). I interpret this as an indication of the aircraft exiting pavement.
• At the last recorded data the ground speed was 33m/s (65kt). I assume this was the point where equipment in the EE bay was damaged to inoperability, possibly from a collision or landing gear collapse.

So that works out to roughly 8 to 10 seconds to travel the distance from the runway to the perimeter road. I am unsure which direction the vehicles were traveling, but the aircraft would have been 90° to their view.