  In recent years, self-burrowing probes have been studied since they can be
suitable for soil monitoring in locations with limited access such as outer
space bodies and underneath existing structures. We study the performance of a
self-burrowing probe under different gravity conditions, from low gravity
(i.e., 1/6g, 1/3g and 1g) to high gravity (i.e., 5g, 10g and 15g), specifically
in terms of penetration distance and energy consumption. Results show that the
probe reaches efficient penetration in all gravity conditions and that it
achieves larger penetration distances in high gravity conditions. However, the
penetration efficiency, shown as unit energy per meter, is higher in low
gravity. Additionally, we prove that a simple dimensional analysis provides
reasonable scaling factors for first order effects in forces, velocities and
energy. The findings in this study give confidence to the potential use of
self-burrowing probes in campaigns of soil testing and sensor deployment in
outer space or centrifuges in which the gravity conditions can differ from
Earth.
