Download
1 / 13
130 likes | 227 Views
It is most important popular question that most of people want to know that how an aircraft fly. In this presentation, there are some significant points which focus on an aircraft remains keeps in the air.
E N D
How Does an Aircraft Fly? Presented By: Lindsay green
Table of Content Introduction Aerodynamics Air Flow Flying Without Engines Wing Components Flaps Ailerons Speed Brakes
Introduction Aircraft consist largely of a cylindrical fuselage with wings attached. A machine that is able to fly by gaining support from the air. The human activity that surrounds aircraft is called aviation.
Aerodynamics Name for the interplay of forces that drive an object through the air. If we look at a cross section of an aircraft wing, we can see that the upper edge is rounder on the lower edge.
Aerodynamics(contt..) The speed of the air around the upper edge is greater than that of the air travelling below the wing. It states that, the faster a gas (in this case, air) travels, the lower the pressure it exerts. The pressure against the wing’s upper edge is considerably lower than the pressure against the lower edge.
Air Flow We are actually hanging on the air , Because the pressure against the upper edge of the wing is lower than that against the lower edge. However, the wing does have to be passing through the air. There must be air flow around the wing in order for the pressure differential to arise.
Air Flow(contt..) we need engines to create propulsion. They cause the wings to pass through the surrounding air. It creates a balance in which we can see two forces horizontally.
Flying Without Engines Even if the engines stopped working—which happens very rarely—aircraft are still capable of gliding great distances. On every flight, as we make our approach for landing, we reduce the engine’s propulsion. We don’t turn the engine off completely, but they turn because of the air passing through them. So they are not creating any propulsion.
Wing Components The wing is designed to provide optimum lift at normal speed, which we call cruising speed. For a jet, that’s about 850 kilo metresper hour. Of course we can’t take off or land at that speed. We would need a much longer runway to do that.
Flaps Flaps are long panels on the trailing edge of the wing that we can extend bit-by-bit. Some aircraft also have flaps on the wings’ leading edge—sometimes called slats. After takeoff, as the aircraft increases speed, we retract the flaps.
Ailerons By varying the wing’s curvature, we cause one wing to give it more lift than the other. For instance, when we make a left turn, we push the right aileron down which gives it greater curvature and more lift, thereby pushing the left wing down.
Speed Brakes Finally, the wings have long panels along the upper edge. We call these speed brakes. It’s not a true brake. Rather, it “disrupts” the air around the wing. It reduces lift and allows us to descend more quickly, if necessary.
