2006-06-13 10:52:55 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
They appear to do so, but it is an optical illusion. When you are up higher you get a bigger view of the earth's surface and therefore you seem to be moving slower, because you see more. The objects are far away and seem to be moving slowly.
As you come closer to the earth, your field of view is reduced and you come closer to objects on the ground that you can relate to. The closer you come to a hangar or airport building, the larger it seems, and the faster the plane seems to be going. The plane is slowing down, but the visuals are getting bigger and there is that momentary feeling that you are going faster, especially when the plane makes that very first "touch down" I have flown in commercial jets now and again and that feeling is still there.
When driving there is a sound we recognize as "gunning the engine". You hear that same sound as the plane lands but it is actually the aircraft's engines gearing down to help the plane land.
2006-06-13 11:14:31 · answer #1 · answered by Ding-Ding 7 · 2⤊ 0⤋
The airspeed of a landing aircraft is always lower than the airspeed in normal flight.
The lower speed is usually achieved with flaps which increase lift at the expense of increased drag.
2006-06-13 18:09:53 · answer #2 · answered by dmb06851 7 · 0⤊ 0⤋
they actually go much slower then in normal flight, the drop their flaps and reverse the engines so they dont go off the end of the runway
2006-06-13 18:03:18 · answer #3 · answered by yay, Oz smashed japan 1 · 0⤊ 0⤋
Their angular velocity relative to earth is higher.
2006-06-13 17:55:25 · answer #4 · answered by Junk Head 3 · 0⤊ 0⤋