Questions tagged [emas]

An engineered-materials arrestor system (EMAS) is a device for safely stopping an aircraft that runs off the runway, typically using a bed of crushable material that the aircraft runs through.

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1answer
6k views

How do pilots use stopway, EMAS, clearway and displaced threshold?

I noticed in Why is “clearway minus stopway” used in V1 adjustments? that a stopway and an EMAS are both indicated by yellow chevrons: Same Opa-Locka stopway on the left, and San Diego EMAS on the ...
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0answers
79 views

Why is crushable-block EMAS the only overrunning-aircraft-stopping system in wide civilian use?

Because runway overruns often end badly, and many runway ends (especially older ones) don’t have enough clear space available beyond the runway end for a full-size runway safety area (RSA), EMAS has ...
5
votes
1answer
339 views

To what requirements / assumptions RSAs & EMAS designed?

I've several questions regarding runway safety area (RSA) and engineered materials arresting system (EMAS): Is RSA/EMAS designed for impact loading at the point of touchdown and to absorb energy of ...
12
votes
2answers
567 views

What would happen if an aircraft were to touch down on EMAS?

What would happen if a jet (say, a A330) were to touch down on the Engineered Materials Arrestor System (EMAS) just before the runway, instead of on it? According to the FAA the EMAS is designed to "...
6
votes
1answer
415 views

How does EMAS reduce damage in case of an aircraft overrun?

I saw a report about Mike Pence's plane overrun today on Twitter link: Mike Pence plane overrun photo on Twitter. As can be seen there is huge cracks and breaking of the runway but the plane was ...
0
votes
2answers
222 views

What prevents the use of an EMAS along the sides of a runway?

The NTSB report about the crash of American Airlines Flight 1420 discusses whether an EMAS would have mitigated the severity of the accident, but concludes, based on testimony from a representative of ...
2
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0answers
147 views

Why do so few non-US runways have EMAS beds?

As occurrences of an aircraft running off the end of the runway and hitting things tend to leave both the aircraft and whatever it hits rather the worse for wear, much effort over the years has gone ...