L/D ratio

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L/D ratio

[′el′dē ‚rā·shō]
(engineering)
Length to diameter ratio, a frequently used engineering relationship.
References in periodicals archive ?
The rigid wingsail provides more lift than traditional soft sails as well as a better lift-to-drag ratio.
Washington, Dec 18 ( ANI ): After three years of innovative study, researchers have presented a body-wing-blending configuration with double flanking air inlets layout to aim at design requirements of high lift-to-drag ratio as well as high volumetric efficiency of next generation hypersonic airplanes.
For example, by adding winglets to aircraft wingtips we can effectively increase the wing span, and thereby increase the lift-to-drag ratio," said Dr.
Effectiveness in gliding flight is accomplished by the lift-to-drag ratio and by preventing stalling.
Technology increases an aircraft's lift-to-drag ratio by expanding the wing area and camber and lengthening the chord.
And by harnessing the bow wave energy, we can increase the lift-to-drag ratio of the boat, which allows the boat to go faster and have a smoother ride quality and carry a larger payload.
A key feature of the new aircraft is a new wing design, which offers a double-digit improvement in lift-to-drag ratio over present-day Falcon wings.
Model #8, however, performed well beyond the other models, in lift, drag, and lift-to-drag ratio.
The first phase of the DARPA VTOL X-Plane program -- a four-year $130 million effort to fly an experimental aircraft that flies faster than 300 knots with a hover efficiency of 75 percent or better and a cruise lift-to-drag ratio of 10 or more.
And when they analysed how the fish's lift-to-drag ratio changed as they varied the tilt angle, the duo found that the ratio was highest and the fish glided furthest when they were parallel to the surface, which is exactly what they do above the ocean.
Reno-based AeroTech Services announced the availability of its wing modification for the Boeing 737 Classic family, which it claims "reduces fuel consumption by up to 4%" by increasing lift-to-drag ratio.