Why don't the wings of airplanes have to flap like the wings of birds?

Answer 1

Animals use four legs for their motion. Man, learning to balance on two legs, uses two legs for their motion. Boats move with the aid of two or more oars.

In all these the common thing is a pushing force is applied in a direction opposite to the direction of motion.

When wheels are invented, wheels are being used for motion. We can imagine a wheel as having infinite number of legs. Thus using wheels speed is increased. The motion becomes continuous and not in jerks.

Compared to a mountain a stone is nothing. Similarly compared to wheel leg is nothing.

Birds use two wings to push the air in a direction such that it is lifted as well as pushed forward; in short for flying.

The propeller in plane uses the principle of wheel for pushing air; infinite numbers of wings are used instead of two wings. Thus a continuous push of air is obtained instead of intermittent push like birds do push.

If we construct a plane which uses the motion of two wings for its flying, it is equivalent to have a car which uses four legs instead of four wheels.

Answer 2

there are two forces that allow the airplane to remain flying without flapping its wings. 1. the air flow over the top of the wing is at a lower pressure than the air flow over the bottom of the wing so the airflow over the bottom exerts an upward force. 2. the wing is slightly tilted upward so the the air flow over the bottom of the wing pushes up on the wing adding lift to the plane. So long as the plane can maintain a forward speed the wing provide lift.

The wings of the bird not only provide lift but also provide forward and sometimes backward thrust also giving it propulsion.

Answer 3

there are two forces that allow the airplane to remain flying without flapping its wings. 1. the air flow over the top of the wing is at a lower pressure than the air flow over the bottom of the wing so the airflow over the bottom exerts an upward force. 2. the wing is slightly tilted upward so the the air flow over the bottom of the wing pushes up on the wing adding lift to the plane. So long as the plane can maintain a forward speed the wing provide lift.

The wings of the bird not only provide lift but also provide forward and sometimes backward thrust also giving it propulsion.

sometimes backward thrust also giving it propulsion.

Answer 4

Airplanes have engines that push them through the air causing lift to the wings. Birds develop lift and forward motion through flapping their wings

Answer 5

extra suitable birds tend to have a miles better wingspan, for this reason they are able to push extra air than their opposite numbers and experience air currents extra effectively decreasing the would desire to flap their wing as usually. additionally extra suitable birds tend to fly at bigger altitudes utilising air currents to help propulsion. think of with regard to the version between dropping a great flat piece of paper and a small one. the extra suitable one would desire to take longer to hit the floor with the aid of extra suitable floor section. The effect is extra stated the better from the floor the paper falls. Airplanes have not got flapping wings for a number of motives. one that somebody has already stated, is as a results of the fact it has an engine to furnish propulsion. yet another excuse is that making the wings flap might advise the addition of extra shifting factors. this might upload mass to the airplane and might furnish extra places for mechanical failure.

Answer 6

engines and plus the airlines don't want to pay extra for the battery/gas to operate the wing
the ride in an airplane could even be noisy
go to this website to see a plane with real wings lol

Answer 7

Birds only flap when they're starting to fly. If you see a bird in the air it's normally soaring.

Also, planes are a lot bigger than birds, and they have either propellers or engines.

Answer 8

bird's flap their wings to propel them forward. planes have engines to do that. when a bird stops flapping they can soar like a plane but need an extra boost to keep from gradually decending.

Answer 9

All our well developed engine technology has a rotary output, which lends itself very well to turning a propeller or jet compressor at very high speed. If we had some exotic new engine that produced a few powerful push-pull cycles per minute instead of thousands of rotations per minute, it might be different.

Answer 10

Wings aren't for flight, but for areodynamic desigin to make it glide.