it doesn't the lighter their wings are the easier they can fly
It cuts the air evenly and builds the pressure to fly.
no.because the designs just make it look better so basicly it do not affect flight
http://www.usatoday.com/money/biztravel/2006-06-05-winglet-money_x.htm
Paper airplanes work by utilizing the principles of aerodynamics. When thrown, the wings of the paper airplane create lift, which allows it to stay in the air. Factors that affect a paper airplane's flight performance include the design of the airplane, the weight distribution, the shape of the wings, and the force of the throw.
Wings
The shape of airplane wings can be changed during flight by adding ailerons and flaps.
An airplane has wings to generate the lift required for flight.
When a moth's wings are touched, tiny scales on the wings can be dislodged, which can affect the moth's ability to fly properly. This can disrupt their flight pattern and make it difficult for them to fly until the scales regenerate.
Flight is a phenomenon that has long been a part of the natural world. Birds fly not only by flapping their wings, but by gliding with their wings.
flight feathers
wings