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An ASH 31 glider with very high aspect ratio (AR=33.5) and lift-to-drag ratio (L/D=56) In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord. It is equal to the square of the wingspan divided by the wing area. Thus, a long, narrow wing has a high aspect ratio, whereas a short, wide wing has a low aspect ratio. [1]
The aspect ratio is the span divided by the mean or average chord. [10] It is a measure of how long and slender the wing appears when seen from above or below. Low aspect ratio: short and stubby wing. Structurally efficient, high instantaneous roll rate, low supersonic drag.
The natural outcome of this requirement is a wing design that is thin and wide, which has a low thickness-to-chord ratio. At lower speeds, undesirable parasitic drag is largely a function of the total surface area, which suggests using a wing with minimum chord, leading to the high aspect ratios seen on light aircraft and regional airliners ...
For example, the aspect ratio of a rectangle is the ratio of its longer side to its shorter side—the ratio of width to height, [1] [2] when the rectangle is oriented as a "landscape". The aspect ratio is most often expressed as two integer numbers separated by a colon (x:y), less commonly as a simple or decimal fraction .
In aviation, the aspect ratio of aircraft tapered wings is found by dividing the square of the wing span {b} by the total wing area (S): AR = b 2 /S If the wing has a constant chord, the aspect ratio is the result of dividing the wingspan (b) by the value of the chord (c): AR = b/c
A Saab 37 Viggen, the first modern canard aircraft to go into production. In aeronautics, a canard is a wing configuration in which a small forewing or foreplane is placed forward of the main wing of a fixed-wing aircraft or a weapon. The term "canard" may be used to describe the aircraft itself, the wing configuration, or the foreplane.
The Van's RV-9 and RV-9A are American two-seat, single-engine, low-wing homebuilt airplanes sold in kit form by Van's Aircraft of Aurora, Oregon. The RV-9 is the tail-wheel equipped version while the RV-9A features a nose-wheel. [4] [5] [6] The RV-9 was built around a newly designed high aspect ratio wing, featuring a Roncz airfoil.
The chines of the Lockheed Blackbird series extend about 40% of the aircraft's length and contribute useful additional lift at supersonic speeds. The chines may be understood as enhancing the lift generated by the forebody by acting as a low aspect ratio canard surface. [ 3 ]