Abstract
Experimental studies were carried out to determine the coefficient of resistance when conical and cylindrical impactors penetrate into sandy soil. In experiments, the angle of half-solution of the conical tip of the penetrator varied from 10 to 90 deg. The speed of the penetrator changed in the range of 0.2-2.0 km / s. The average values of the drag coefficient are obtained for conical bodies with quasi-stationary supersonic motion in sandy soil with an average humidity of 7-12%, and for impactors with a flat front end - in sandy soil with a humidity of 0 to 16%. A significant dependence of the drag coefficient of thin cones (β < 25◦) on the speed of movement and the absence of such a coefficient (taking into account the experimental error) for blunt cones and a flat-end striker is shown.
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