📷: @avgeekmel ———————————————————
Have you ever wondered why there is a really loud noise for a couple seconds during landing, a roar that seems to cut on then back off? That is the distinctive sound of the thrust reversers slowing the plane. 🛩
A thrust reverser is, as the name suggests, a device that ‘reverses’ the air output of a turbofan engine. This helps slow the plane down at high speeds, used during landings.
It doesn’t entirely reverse the airflow, it’s not like the turbines spin the other way or anything. The thrust is only diverted in a direction perpendicular to the direction of normal airflow, give or take the engine size. This disrupts airflow and helps keep the plane on the ground. It can be catastrophic when the reversers are deployed in mid flight, but, hypothetically, it should not hinder the flying ability of an aircraft if deployed at an inopportune time. (Although there are multiple crash accounts and documentations of this exact instance.....) 🔹
Reversers look different according to the size and purpose of the engine. A 777 reverser looks way different from the reverser of a little Citation. Some are buckets outside of the engine while some are internal and the engine appears to separate into two parts post touching down. Airbus has separate reverser panes in sets of four on each engine, pictured above.
So next time you go flying, think, “Hey, those are the reversers!”
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