One of the challenges in delivering a mobile robot to the Moon is getting it off the lander and down to the surface. The video below shows the conceptual design of a ramp that unfolds from the lander using only a preloaded spring for power. During flight, the mechanism is clamped in place using frangibolts, which are electrically triggered release mechanisms. When the frangibolts release, the ramp unfolds under the control of a series of rigid hinged linkages called a four-bar mechanism. The mechanism fully extends the ramp well before it touches the ground -- no rocks or other obstacles can prevent its full deployment. The robot drives down the ramp's gentle 15-degree slope. A second ramp on the opposite side of the rover provides an alternative exit if rocks or craters present hazards on one side.

The image below shows details, including the ring attachment to the launch vehicle at the bottom. Launch forces are transmitted through the ring up to a second ring visible under the rover. The yellow panel on the right of the lander indicates one of eight locations where payloads can be attached to the lander. All eight locations have direct access to the lunar soil for experiments, and four them also have direct sky views for communications or optical experiments.