I'm not sure what you mean by "need" since weight is a concomitant - everything used to construct an aircraft has weight. It's a fact of life.
Aircraft designers do everything possible to reduceweight.
An airplane needs enough lift to overcome its weight in order to fly. The amount of lift required depends on factors such as the aircraft's weight, velocity, wing design, and air density. Pilots can adjust the airplane's angle of attack and airspeed to generate the necessary lift for flight.
You can get a plane to fly faster (for a given force applied) by decreasing drag, e.g. reducing the width of the fuselage or wings (the latter also reduces lift). If you add weight to a paper plane, especially at the nose, you can get it to fly faster for a given acceleration (i.e. the throwing motion) -- the additional weight will increase the speed gained as gravity drags the plane down, because the air resistance is a function of the area, not the weight. A metal plane will fall faster (and with a higher terminal velocity) than a paper one if they have the same resistance area.
Planes fly due to a combination of lift generated by the wings, thrust provided by the engines, weight of the plane, and drag caused by air resistance. Lift is primarily created by the shape of the wings and the air moving over them at high speed, providing the necessary force to keep the plane airborne. Thrust from the engines allows the plane to move forward, overcoming drag, while the weight of the plane is balanced by the lift generated by the wings to maintain altitude.
No. A fly hovering above you doesn't make you feel heavier does it? Although you probably would'NT feel it anyway.
No, the weight of the airplane will not change when birds fly inside. The weight of the airplane is determined by factors like the total mass of the plane, fuel, cargo, and passengers - the presence of birds inside will not significantly impact this total weight.
It makes the plane weigh more.
You can't fly. You will need a jet pack or plane. there is no other way
Gliders are pulled by a small plane into the air and then the gliders move around catching air currents from the heat.
well it will need to make the forces unequal to take off, but yes it can fly with them all equal.
A piece of paper
They made the first plane to fly in air in 1903.
Bord a plane.
Yes.
Well... they need to know how to fly a plane
you must know how to navigate,operate and monitor your plane.
Fly in Austrailia
Nose weight often helps to bring the wings into flying attitude.