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B- Optical Illusion When I saw my first jumbo jet make a landing, I thought the C-5 would stall and fall out of the sky. It looked like it was just hanging up there. Some of that is a perception of the viewer. They appear to be moving slower than they really are. This can be due to the fact that there are no solid references to visualize their speed. A car has the stripe in the center of the road or telephone poles. The brain can not accurately percieve the size of the aircraft or its speed without any visual reference points.
AddendumB above is a great . Today's large aircraft, other than those designed to exceed the sound barrier, all have maximum speeds around .9 Mach, or 9/10s of the speed of sound. They take off, cruise, and land at higher speeds than most smaller aircraft, but as B points out above, they are so large that they appear to be moving relatively slowly.Another Opinion
Bigger planes have more air resistance than a smaller plane and they are heavier. So the engine has to work much harder to get it moving and to keep it moving.
MoreWhat really happens is they are going so fast over a emensly massive area so it just looks as though it is going slow when it is just going over a big area.AND MORE
Perceived speed and size, as determined by the number of times an object is refreshed by your minds eye and the distance it travels, is illusionary. If you think of an October Moon, the relationship between the speed of a large appearing object and a small appearing object is obvious. A above is not at all correct.
2nd Opinion
Contrare. A large plane takes more energy and time to move, rotate or translate. A large jumbo jet may still be landing at 140knots but it takes more time to pitch up its nose to flare than an F-18. Jets with four engines under the wing takes longer to Roll about its longitudinal axis than an F-18 with short stubby wings. Otherwise, the F-18 would be equipped with 4 jet engines under its wings. But big planes are awesome
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