Thus, the aircraft is lifted into the air. The wing tips could be warped in opposite directions, setting up an unbalanced lift force on the two wings, and hence providing a control mechanism to roll the airplane. Lift is the vacuum produced by air traveling faster over the top of a wing than it does on it's underside. With the progress of the science of aerodynamics, there are variety of techniques and tools to accomplish this time consuming job. A reflex airfoil only produces lift in its forward part. Blended Wing Body The blended wing body configuration is highly fuel efficient as it maximizes the lift of the entire airplane while also improving cabin size. The rear part produces a little downforce at high speed and proportionally much less lift than the forward part at low speed, so the whole wing will become less efficient. Lift In order for an aircraft to rise into the air, a force must be created that equals or exceeds the force of gravity. The amount of lift depends on the speed of the air around the wing and the density of the air. Different wing planforms can typically be grouped into those used for low-speed flight, and those used for high-speed flight. Their particular design for any given aircraft depends on a number of factors, such as size, weight, use of the aircraft, desired speed in flight and at landing, and desired rate of climb. A short take-off and landing (STOL) aircraft must be able to fly at low controlled speeds, yet it must also offer acceptable cross-country (cruise) performance. Welcome to part 6 of a series on an Introduction to Aircraft Design. Here are the 6 most common wing planforms out there.1) Rectangular wings stall from the root, but they create lots of induced drag at the tips. To produce more lift, the object must speed up and/or increase the angle of attack of the wing (by pushing the aircraft’s tail downwards). The Wrights pioneered the concept of lateral (roll) control – one of their most important technical contributions to the airplane. In heavier-than-air craft, lift is created by the flow of air over an airfoil. When a wing generates aerodynamic lift, the air on the top surface has lower pressure relative to the bottom surface.Air flows from below the wing and out around the tip to the top of the wing in a circular fashion. The shape of an airfoil causes air to flow faster on top than on bottom. HIGH-LIFT WING DESIGN. It will be better to reduce wing area and to use an airfoil with an excellent ratio of lift to drag. Below, you can see how rectangular the Piper PA-23 Aztec's wing really is. In part 5 we looked at the role that the airfoil profile plays in determining the flying characteristics associated with its selection. This force is called lift. 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