Force and moment data were obtained for two groups of lifting reentry-configurations. One group consisted of five elliptic-lenticular configurations and the other group consisted of five three-dimensional ellipsoid configurations. The thickness-chord ratio varied from 0.3 to 0.9 for both groups.nThe results of the investigation indicate that in general all of the con figurations were statically unstable at angles of attack near 0° with the center of gravity at 50 percent of the maximum chord. A forward movement of the center of gravity to 40-percent chord results in a stable condition at 0 for thickness-chord ratios greater than about 0.72 for the elliptic-lenticular con figurations and about 0.77 for the three-dimensional ellipsoid configurations. All of the configurations are stable near 90° angle of attack for both center-of-gravity locations. However, the configurations are less stable with increasing thickness-chord ratio.
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