American lunar rover. Study 1963. The Grumman Lunar Logistics System Project 344 unmanned rover design of February 1963 had 4 wheels (two equal-weight, 2 wheel modules of 360 cm diameter). The robot had a range of 750 km.
Status: Study 1963. Gross mass: 880 kg (1,940 lb).
The design was also adaptable to a 2-wheel power module weighing 450 kg. It would perform unmanned functions. Navigation accuracy was 300 m.