An airplane trades forward motion for lift. So consequently, it must keep running its engines to replace lost momentum. The air provides this lift, so you will find the air behind the airplane moving downward and a little forwards...
yes it can
no NO PLANE CAN STAY IN AIR EXPECT HELICOPTER JUST BECAUSE OF HIS WINGS
By not having enough lift and air speed under the wings.
A plane with no engine is a glider. They use the air currents to stay aloft.
The wind pushes the plane helping it stay in the air.
The top is rounded in a way and the bottom is flat. This makes lift. That is how a plane stays up in the air.
Throw it off a plane.
The plane was able to stay in air for just a few minutes. Then it lost power and came down. This successful powered flight was done in 1903.
...the same or greater than...
With more surface area on the wings of the paper airplane there will be more air providing lift for the plane. If the mass of the plane is increased less than the surface area of the plane is increased, then the ratio of the force of gravity to force of lift should decrease, theoretically, allowing the plane to stay in the air longer. There are other significant factors in how long the paper airplane will stay air born. The Launch speed is directly proportional to the amount of air moving over the wings which provides lift. However, the larger the plane and the lighter the material is the more likely the plane will deform at high launch speeds or from launching the plane by holding to far back on the plane during launch, which will make the plain more likely to drop from lack of lift if the plane deforms too much.
The larger the wing-span.... the larger the surface area that the air flows over. The more surface area presented to the air-flow... the longer the plane can stay airborne.
The large wing usually works depending on what type of paper plane you want.