As jumping is an effective method of moving over rough terrain, there is much interest in building robots that can jump, and deformation of a soft robot's body is an effective method to induce jumping. Our aim was to investigate the effect of the initial deformed shape of deformation of a circular shell made of spring metal . The dish shape jumped the highest in the initial shapes of deformation, with the dish jumping twice as high as the cap . A simulation of a model was in good agreement with

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... the observations. We showed that the jumping height is determined by impulse , time and the center of gravity until taking off from the ground .