L/D ratio

(redirected from Lift-to-drag 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 aircraft has a flatter, wedge-shaped body that improves its supersonic lift-to-drag ratio, thus increasing the capability of speed.
To improve performances such as the lift-to-drag ratio and drag characteristics, the sizing and aerodynamic configuration design must be carefully conducted, taking into consideration the low Reynolds number environment.
Re-thinking Orca's propeller placement paid off, and was one of several innovations that helped the aircraft achieve a theoretical lift-to-drag ratio of between 95 and 97 percent.
Curves of vehicle height, velocity, flight path angle, lift coefficient, lift-to-drag ratio, heat flux, pressure, and overload in the atmospheric flight changing with time in the two cases are given by Figures 3-10.
In order to deal with higher altitude, which in turn, result in longer transit periods for operators, CPS has highlighted a series of upgrades designed to make parachute openings more consistent and less dangerous while improving flight stability and manoeuvrability, and managing safe landings: "Our developmental programme demonstrated that a few subtle design revisions to the existing MS family, primarily changes in airfoil shape and line trim, improved the lift-to-drag ratio. (Both) the M3 and M4 are built using hybrid construction, and by retaining polyester suspension lines, unwanted trim line variations due to line trim creep was eliminated which can potentially affect glide performance.
In fixed-wing airplanes, ground effect may be defined as an increase in lift and decreased induced drag when the wings are close to the surface (ground or water), increasing an airplane's lift-to-drag ratio. Under these conditions, wingtip vortices are unable to form effectively due to obstruction by the surface, resulting in less rearward tilting of the lift vector, also known as less induced drag.
Citing reports from The Filipino Times, the contest solicited innovative ideas which would help increase the lift-to-drag ratio of NASA's inflatable spacecraft invention, the Hypersonic Inflatable Aerodynamic Decelerator (HIAD).
Was she some sort of 'Jilly Elliot' figure; turning down her turn in the Wendy house to finish building a wind tunnel out of her mam's hairdryer and granda's lit woodbine so she could test the lift-to-drag ratio of her latest wing design?
The rigid wingsail provides more lift than traditional soft sails as well as a better lift-to-drag ratio. Composite materials are used extensively for the construction of the yachts and chosen for their lightweight properties, stiffness and strength.
Seventy-five percent of the aerodynamic downforce acts on the rear of the car; the lift-to-drag ratio is >4.0.
The ground effect (GE) is a phenomenon where the lift-to-drag ratio of a body will increase while it is cruising at a very close distance to the surface of water or ground [2].
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.