the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused...
16 KB (1,830 words) - 02:53, 12 August 2024
lift-to-drag ratio increases with aspect ratio, improving the fuel economy in powered airplanes and the gliding angle of sailplanes. The aspect ratio...
12 KB (1,621 words) - 18:03, 4 April 2024
Gliding flight (redirect from Glide Slope Ratio)
The ratio of the distance forwards to downwards is called the glide ratio. The glide ratio (E) is numerically equal to the lift-to-drag ratio under...
30 KB (3,386 words) - 12:44, 1 October 2024
Lift-induced drag, induced drag, vortex drag, or sometimes drag due to lift, in aerodynamics, is an aerodynamic drag force that occurs whenever a moving...
22 KB (2,431 words) - 14:03, 31 July 2024
Flight (section Lift-to-drag ratio)
drag. The lift/drag ratio is determined by dividing the lift coefficient by the drag coefficient, CL/CD. The lift coefficient Cl is equal to the lift...
35 KB (4,200 words) - 00:24, 24 September 2024
lift-to-drag ratio. The lift a wing generates at a given speed and angle of attack can be one to two orders of magnitude greater than the total drag on...
18 KB (1,688 words) - 13:36, 22 August 2024
The drag curve or drag polar is the relationship between the drag on an aircraft and other variables, such as lift, the coefficient of lift, angle-of-attack...
23 KB (2,679 words) - 22:11, 25 July 2024
ratio of 2.5, increasing to 3.5-4 for the HTV-2 and 4-5 for the HTV-3. The actual lift-to-drag ratio of HTV-2 was estimated to be 2.6. HTV-2 was to lead...
14 KB (1,252 words) - 15:50, 27 August 2024
the aircraft. Winglets also reduce the lift-induced drag caused by wingtip vortices and improve lift-to-drag ratio. This increases fuel efficiency in powered...
45 KB (4,756 words) - 15:40, 1 May 2024
F=c_{p}P_{br}} Thrust power is the speed multiplied by the drag, is obtained from the lift-to-drag ratio: P a = V C D C L W g ; {\displaystyle P_{a}=V{\frac...
16 KB (2,711 words) - 12:51, 4 October 2024
the lower surface. Lift-to-drag ratio Drag coefficient Foil (fluid mechanics) Pitching moment Circulation control wing Zero lift axis Clancy, L. J. (1975)...
7 KB (1,022 words) - 12:58, 27 August 2024
increase drag while making little change to lift, whereas spoilers reduce the lift-to-drag ratio and require a higher angle of attack to maintain lift, resulting...
8 KB (854 words) - 01:09, 3 July 2024
thrust-to-weight ratio and lift-to-drag ratio are the two most important parameters in determining the performance of an aircraft. The thrust-to-weight...
23 KB (1,695 words) - 09:22, 24 July 2024
lightness and strength. The geometry of wingsails provides more lift, and a better lift-to-drag ratio, than traditional sails. Wingsails are more complex and...
8 KB (865 words) - 11:24, 20 September 2024
density of the air is lower. For propeller aircraft, drag is minimised when the lift-to-drag ratio is maximised. However, the speed for this is typically...
8 KB (853 words) - 09:41, 14 June 2024
the zero-lift drag coefficient C D , 0 {\displaystyle C_{D,0}} is a dimensionless parameter which relates an aircraft's zero-lift drag force to its size...
4 KB (693 words) - 08:53, 2 October 2022
airfoil. It is used for near-supersonic flight and produces a higher lift-to-drag ratio at near supersonic flight than traditional airfoils. Supercritical...
5 KB (646 words) - 12:53, 8 September 2024
"cranked-arrow" wing (similar to that of the Saab 35 Draken) was pursued due to its much more efficient lift-to-drag ratio at supersonic speeds. The company...
26 KB (2,735 words) - 15:40, 4 October 2024
L/D may refer to: Learning and development, in human resource management Lift-to-drag ratio, in aerodynamics Lincoln–Douglas debates, a series of seven...
439 bytes (83 words) - 01:35, 18 December 2018
Early hang gliders had a low lift-to-drag ratio, so pilots were restricted to gliding down small hills. By the 1980s this ratio significantly improved, and...
40 KB (5,181 words) - 19:13, 10 October 2024
region of flight below the maximum lift to drag ratio, where induced drag becomes more significant than parasitic drag. Slow flight can be as slow as 3-5...
2 KB (222 words) - 15:58, 9 January 2024
whereas lift-induced drag is the result of an airfoil generating lift. Parasitic drag comprises all types of drag except lift-induced drag. Form drag arises...
8 KB (1,044 words) - 03:11, 7 June 2024
claims and the resulting national coverage found the airfoil to have worse lift-to-drag ratio than a flat plate airfoil in wind tunnel tests. In the 1990s...
11 KB (1,434 words) - 19:28, 4 October 2024
force on the object. Lift is the component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag force, which is the...
100 KB (13,296 words) - 00:46, 20 September 2024
Because of differences in lift generation, aircraft operating at supersonic speeds have approximately one-half the lift-to-drag ratio of subsonic aircraft...
71 KB (8,084 words) - 04:38, 9 October 2024
same aspect ratio and an elliptical lift distribution. The Oswald efficiency is defined for the cases where the overall coefficient of drag of the wing...
3 KB (428 words) - 14:12, 27 January 2023
Reentry capsule (section Gravity, drag, and lift)
typically possible to construct small capsules of performance comparable to lifting body or spaceplane designs in all but lift-to-drag ratio for less cost...
16 KB (1,956 words) - 14:29, 14 August 2024
maximizing lift-to-drag ratio, which is attained by minimizing parasitic drag, and lift-generated induced drag, the two components of aerodynamic drag. As parasitic...
121 KB (7,376 words) - 22:10, 18 August 2024
section; it gives reasonable overall performance in respect of its lift-to-drag ratio, and has gentle and relatively benign stall characteristics. The flat...
5 KB (480 words) - 13:04, 7 May 2024
range equation describes the relationship of range with airspeed, lift-to-drag ratio, specific fuel consumption, and the part of the total fuel fraction...
10 KB (593 words) - 22:48, 19 March 2024