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Using light-weight materials, an aerodynamic design, power source to get the plane off the ground will all help. Probably the biggest thing a plane needs is enough lift from the wings. The shape of the wing helps create this lift. The wing's profile kind of looks like a tear drop that is flat on the bottom and curved on the top tapering to a point to the rear of the wing. If I remember correctly, this profile creates an area of high pressure on the underside of the wing compared to a lower pressure on top of the wing. This is what creates the lift for the plane. Of course you have to maintain a proper speed to maintain this lift in order to keep the plane in the air...Hope that helps.

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14y ago

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