ESDU 93034 presents graphical data at taper ratios of 0@ 0.5 and 1 applying at Mach numbers of 0.5 and below@ and at Mach numbers of 0.8 and 0.95. They were obtained by correlating experimental data drawn from the literature for delta@ cropped delta and rectangular thin@ uncambered and untwisted@ sharp-edged wings of aspect ratio from 0.2 to 4 and apply up to angles of attack of 35 degrees@ that is up to the stall. Below an angle of attack of 5 degrees@ the normal force is obtained from the normal-force-curve slope at zero angle of attack@ and a graph is provided for that based on the method of ESDU 70011. The accuracy of the method is within 5 per cent. The flow phenomena and the behaviour of the normal-force curve over a wide angle of attack range is discussed@ with particular emphasis on delta wings. An analysis of more limited data enabled a correlation to be developed above the stall for thin (thickness oot chord less than 0.02) sharp-edged delta and rectangular wings of aspect ratio from 0.25 to 4 at low speeds. The data were available to angles of attack of 70 degrees and were extrapolated to 90 degrees guided by the correlations of ESDU 70015.
ESDU 93034 B-1995 history
1995ESDU 93034 B-1995 Normal force of low-aspect-ratio cropped-delta wings up to high angles of attack at subsonic speeds.