Strange knob on airplanes?

Strange knob on airplanes? - Old rusty plane with polished wooden knob

I have noticed this strange knob on flights typically near the video screen (in this case on the right and is underneath the USB port).

Strange Knob in Flights

Is there a use to this knob or is it just a component which has remained in airplane design for some reason or the other and is not required for use by the passenger?

Typically it just comes out to a certain length and goes back in, does it do something else as well?






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What is the hump on top of airplanes?

The bump on the top of some commercial airliners is, in fact, a radome. This blended word meshes together the two things that identify the lump \u2013 radar and dome. While it's a neat portmanteau, it doesn't fully explain the need for this addition to the aircraft fuselage.

What is the hump on top of Southwest planes?

It is the antenna for the inflight wifi system. The Southwest aircraft has a Ku band antenna on the top, allowing it to access the internet through satellites.

What do airplane chimes mean?

Cimato first explains that if you hear a high-to-low chime, it means one flight attendant is signaling another \u2014 or that the flight deck is trying to reach them. Meanwhile, one single tone means that a passenger is trying to get help from a flight attendant.

What is the name of the flap on the wing on a plane?

Finally, we come to the ailerons, horizontal flaps located near the end of an airplane's wings. These flaps allow one wing to generate more lift than the other, resulting in a rolling motion that allows the plane to bank left or right. Ailerons usually work in opposition.



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Images: Ksenia Chernaya, Ksenia Chernaya, Olya Kobruseva, Olya Kobruseva