An aircraft is any machine capable of atmospheric flight.Fixed-wing aircraft generally use an internal-combustion engine in the form of a piston engine (with a propeller) or a turbine engine (jet or turboprop), to provide thrust that moves the craft forward through the air. The movement of air over the airfoil produces lift that causes the aircraft to fly.
2006-07-11 20:24:22
·
answer #1
·
answered by Eshwar 5
·
0⤊
0⤋
The Bernoulli effect is part of the reason that makes an airplane fly, but not all.
If you think that just the shape of the wing and the upper and lower winds produce lift, then no airplane could fly inverted and a paper or balsa wood plane with straight (flat) wings would not fly.
The other, and many times the main, reason is: action and reaction. The wing has a positive angle of attack. This means that its front (leading edge) is slighty higher than the back (trailing edge). This causes the wind that hits the bottom of the wing to create an upward force. The same familiar effect we get when "flying" a hand out a of the window of a car, changing the angle relative to the wind, making it go up or down.
For example, a Boeing 737 cruises with approximately 3 degrees of nose up.
There are a lot of complex equations and parameters involved, but the basic two factors are Bernoulli's effect and Newton's law of action and reaction.
Hope this does not sound too complicated. A good physics book may help if you want to investigate deeper into these causes.
2006-07-13 07:27:31
·
answer #2
·
answered by Marce X 2
·
0⤊
0⤋
Wind goes over and under the wing. Since the wing sort of looks like a "D" with flat side towards the earth, the wind going over the top of the wing creates an area of relative low pressure, and an area of higher pressure below the wing. It's more like sucking the airplane upward, in a way. That, with the proper amount of thrust, the airplane flys. With the prop, it works the same way as a wing with the air flow, but the lift is not generated upward but foward.
Simply stated!
2006-07-12 00:55:04
·
answer #3
·
answered by Anonymous
·
0⤊
0⤋
Is Lift and Drag. The drag over an Airfoil creates a Low Pressure area Above the wng and a High Pressure area Beneath it. This is what Brunneli was explaining in his Theory of Flight.
A Helicopter uses the Drag of its Rotors to create a Lift.
A Glider uses the Drag of Forward Thrust over an Airfoil shaped Wing to attain Lift.
The same principal appilies to many things that have Atmosphere.
2006-07-11 20:22:12
·
answer #4
·
answered by Anonymous
·
0⤊
0⤋
wind flows beneath the wings of the aircraft and that creates "lift" which in turn raises the aircraft off the ground. In order to get "enough" lift, the aircraft has huge engines that propel it forward at high rates of speeds .... when it comes time to land, the aircraft simply reduces the speed and creates drag on the wings which in turn helps it to descend. It can be a complicated answer, but this is as simple as I can make it. REMEMBER ... LIFT!!!!
2006-07-11 20:14:41
·
answer #5
·
answered by Anonymous
·
0⤊
0⤋
Bernoulli effect.
This is also the same reason the shower curtain bends toward the tub while you're taking a shower.
2006-07-11 20:17:19
·
answer #6
·
answered by mojo7824 2
·
0⤊
0⤋
Forward thrust and the Bernoulli effect. Google it. It's to complicated to explain here. Although many will try.
2006-07-11 20:14:34
·
answer #7
·
answered by Me again 6
·
0⤊
0⤋
Go to the link below...
2006-07-11 20:56:13
·
answer #8
·
answered by Ask Dr. Dingo 3
·
0⤊
0⤋
Pixie dust is spread on their wings.
2006-07-12 01:38:37
·
answer #9
·
answered by john s 2
·
0⤊
0⤋
this one may help you;
http://www.esparacing.com/sport_pilot/how%20aircraft%20fly.htm
2006-07-11 20:15:42
·
answer #10
·
answered by © gosha 2
·
0⤊
0⤋