Apollo Lunar Landing Missions 15, 16 and 17

During the mid-1960s, as NASA, its contractors and sub-contractors were working on the designs of launch vehicles and spacecraft, the space agency was also looking into means of expanding the tools for exploration for astronauts on the lunar surface. At first, these vehicles were very large and heavy, incapable of being sent to the Moon. They were proof-of-concept vehicles and a great deal of design engineering was gleaned from these first-generation vehicles. In time, the phrase lunar roving vehicle, or LRV, was adopted.