The Small Pressurized Rover (SPR)  consists of a Chariot with a pressurized crew cab (PCC).  The SPR combines EVA roving with IVA operations to maximize crewed exploration capability.  The SPR also includes externally mounted manipulators to allow crew to interact with the surface from within the pressurized environment.  The SPR carries sufficient supplies and power to operate for multiple days before requiring resupply.  With the PCC’s built in radiation shelter and facilitation of quick ingress, the SPR provides a safe haven for EVA crews.  The SPR can also accommodate CDKs to provide an unpressurized driving mode and tool attachments to facilitate EVA operations.

Cew egress for EVA – During nominal operations, both crew members will enter their suit, seal the suit and suit port hatch, conduct leak checks, vent the volume in the suit port, and then disconnect the suit from the suit port.  Exit can be conducted simultaneously or one at a time.  Prior to egress cabin is prepared for emergency depress contingency.

Crew ingress from EVA – During nominal operations, both crew members use alignment guides to mate their suits to the suit ports, conduct leak checks, repressurize the volume in the suit port, open the suit and suit port hatch, and enter the pressurized cabin.  Entry can be conducted simultaneously or one at a time.

Unpressurized Rover (Pictured Below)

The crew gains an unpressurized rover (UPR) capability by installing a CDK onto a Chariot CMC.An unpressurized rover provides the capability for two astronauts to conduct EVA operations up to a maximum walk-back distance from the outpost.  The UPR can also accommodate tools, manipulators, and small payloads to assist the crew during the EVA.  The UPR also accommodates for a contingency recovery of stranded crewmembers.

Unpressurized Rover

Operations Concept

Unpressurized crew EVA operations – Utilizing two chassis driving stations or one driving station and the ride-along adapter a crew of two can use the Chariot CMC as an unpressurized rover.

Contingency recovery of stranded crew (four astronaut occupancy) – When outfitted with two chassis driving stations and the ride-along adapter the Chariot CMC can accommodate four crew members in the event of a failure of the second rover.  This configuration can also be used to transport a crew of four during short-distance traverses in the vicinity of the habitat or Lander.

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Last modified: Wednesday, 25-Mar-11 10:07:00 PM CDT

Creator: Jerry Woodfill / NASA, Mail Code ER7, NASA JSC, Houston, TX 77058

A service of the Software, Robotics and Simulation Division, Rob Ambrose, Chief.