in the upper half of the chart show the effect of aspect ratio and represent the part of the drag that varies with a change,in the lift; this portion of the drag is independent of the choice of the section and is equal to the sum of the induced drag and the additional profile drag. The lower part… … FiiiURi 7.—Airplane characteristics showing the relation at the different draj components LIFT-DRAG RATIO Values of L/D can be obtained as usual by dividing the CL by CD and may be plotted against the angle of attack or the lift coefficient as desired. Values of ay of course, are deter- mined from…
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