Very merely, EMAS is an “arrestor mattress” positioned at each ends of a runway, which is stiff sufficient to be walked or pushed on, however mushy sufficient to crumble underneath the load of a aircraft. Product of both crushable mobile cement or silica, coated with a skinny “crust” of poured concrete, EMAS is designed to soundly sluggish an airplane by bogging it down. Think about the impact of dashing off a freeway right into a plowed subject, and you will get the thought. An EMAS arrestor mattress can deliver an airplane that leaves the runway at 80 miles per hour safely and shortly to a cease.
You would possibly assume that probably the most harmful a part of a flight is once you’re cruising at altitude, miles above the earth. However actually, most airplane accidents occur near the bottom, both throughout takeoff or touchdown. Though the takeoff part solely accounts for a fraction of a mean flight time, it is the place 14% of deadly accidents happen. The ultimate method and touchdown part is (statistically) much more harmful, accounting for 49% of deadly accidents (based mostly on information from 2008-2017).
There are lots of causes for this, which embrace the chance of engine failure earlier than the aircraft has constructed up sufficient velocity to get safely airborne, the hazard of fowl strikes, and moist or icy runways, which could trigger a aircraft to skid on touchdown. In every of these eventualities, including further area on the ends of runways gives a worthwhile security margin. Actually, runway security space (RSA) requirements had been put in place within the Nineteen Eighties, particularly for that reason. However not each airport has the posh of extending its runways by the advisable distance. For passengers flying from these airports, EMAS would possibly make the distinction between life and demise.