<P> Astronaut deployment of the LRV from the LM's open Quadrant 1 bay was achieved with a system of pulleys and braked reels using ropes and cloth tapes . The rover was folded and stored in the bay with the underside of the chassis facing out . One astronaut would climb the egress ladder on the LM and release the rover, which would then be slowly tilted out by the second astronaut on the ground through the use of reels and tapes . As the rover was let down from the bay, most of the deployment was automatic . The rear wheels folded out and locked in place . When they touched the ground, the front of the rover could be unfolded, the wheels deployed, and the entire frame let down to the surface by pulleys . </P> <P> The rover components locked into place upon opening . Cabling, pins, and tripods would then be removed and the seats and footrests raised . After switching on all the electronics, the vehicle was ready to back away from the LM . </P> <P> Four flight - ready rovers were manufactured . Three were transported to and left on the Moon via the Apollo 15, 16, and 17 missions, with the fourth rover used for spare parts on the first three following the cancellation of Apollo 18 . Since only the upper stages of the lunar excursion modules could return to lunar orbit from the surface, the vehicles, along with the lower stages were abandoned . As a result, the only lunar rovers on display are test vehicles, trainers, and mock - ups . The rover used on Apollo 15 was left at Hadley - Apennine (26 ° 06 ′ N 3 ° 39 ′ E ﻿ / ﻿ 26.10 ° N 3.65 ° E ﻿ / 26.10; 3.65 ﻿ (Apollo 15 Lunar Roving Vehicle at Hadley--Apennine)). The rover used on Apollo 16 was left at Descartes (8 ° 59 ′ S 15 ° 31 ′ E ﻿ / ﻿ 8.99 ° S 15.51 ° E ﻿ / - 8.99; 15.51 ﻿ (Apollo 16 Lunar Roving Vehicle at Descartes Highlands)). The rover used on Apollo 17 was left at Taurus - Littrow (20 ° 10 ′ N 30 ° 46 ′ E ﻿ / ﻿ 20.16 ° N 30.76 ° E ﻿ / 20.16; 30.76 ﻿ (Apollo 17 Lunar Roving Vehicle at Taurus - Littrow)) and was seen by the Lunar Reconnaissance Orbiter during passes in 2009 and 2011 . </P> <P> Several rovers were created for testing, training, or validation purposes . The engineering mockup is on display at the Museum of Flight in Seattle, Washington . The Qualification Test Unit is on display at the National Air and Space Museum in Washington, D.C. The rover used for vibration testing is on display in the Davidson Saturn V Center at the U.S. Space & Rocket Center in Huntsville, Alabama . Additional test units are on display at the Johnson Space Center in Houston, Texas, and the Kennedy Space Center Visitors Complex in Cape Canaveral, Florida . Replicas of rovers are on display at the National Museum of Naval Aviation in Pensacola, Florida, the Evergreen Aviation & Space Museum in McMinnville, Oregon, and the Kansas Cosmosphere and Space Center in Hutchinson, Kansas . A replica on loan from the Smithsonian Institution is on display at the Mission: Space attraction at Epcot at the Walt Disney World Resort near Orlando, Florida . </P>

Where is the lunar rover located on the moon