FIELD: testing technology. SUBSTANCE: axle 8 of first pendulum 2 on which grip 3 for specimen 4 to be collided with stop 7 mounted on base 1 is mounted eccentrically on axle of second pendulum 5. When both pendulums are released, grip with specimen moves till collision of specimen with stop over trajectory having varying radius of curvature. When only first pendulum is released, grip with specimen moves over trajectory at constant radius of curvature. EFFECT: enhanced reliability. 2 dwg
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