page_title: Apollo 15
section_title: Lunar Roving Vehicle
hierarchical_section_title: Apollo 15 / Hardware / Lunar Roving Vehicle
caption_attribution_description: English: Image from Apollo 15, taken by Commander David Scott at the end of EVA-1. Lunar Module Pilot Jim Irwin is seen with the Lunar Roving Vehicle, with Mount Hadley in the background. Seen on the back of the Rover are two SCBs mounted on the gate, along with the rake, both pairs of tongs, the extension handle with scoop probably attached, and the penetrometer. Note that the TV camera is pointed down, in the stowed position. Русский: Изображение с борта «Аполлон 15», снятое командующим Дэвидом Скоттом в конце первого «cтоячего» выхода из корабля (EVA-1). На нём виден пилот лунного модуля Джим Ирвин, стоящий рядом с лунным внедорожником, на заднем плане — гора Хэдли. Обратите внимание, что телевизионная камера на автомобиле направлена ​​вниз, т.е. установлена в походном положении.
context_page_description: Apollo 15 was the ninth crewed mission in the United States' Apollo program, and the fourth to land on the Moon. It was the first J mission, with a longer stay on the Moon and a greater focus on science than earlier landings. Apollo 15 saw the first use of the Lunar Roving Vehicle.
  The mission began on July 26, 1971, and ended on August 7, the lunar surface exploration taking place between July 30 and August 2. Commander David Scott and Lunar Module Pilot James Irwin landed near Hadley Rille and explored the local area using the rover, allowing them to travel further from the lunar module than had been possible on previous missions. They spent 18​¹⁄₂ hours on the Moon's surface on extravehicular activity, and collected 170 pounds of surface material.
  At the same time, Command Module Pilot Alfred Worden orbited the Moon, operating the sensors in the SIM bay of the service module. This suite of instruments collected data on the Moon and its environment using a panoramic camera, a gamma-ray spectrometer, a mapping camera, a laser altimeter, a mass spectrometer, and a lunar subsatellite deployed at the end of the moonwalks.
context_section_description: A vehicle that could operate on the surface of the Moon had been considered by NASA since the early 1960s. An early version was called MOLAB, which had a closed cabin and would have massed about 6,000 pounds (2,700 kg); some scaled-down prototypes were tested in Arizona. As it became clear NASA would not soon establish a lunar base, such a large vehicle seemed unnecessary. Still, a rover would enhance the J missions, which were to concentrate on science, though its mass was limited to about 500 pounds (230 kg) and it was not then clear that so light a vehicle could be useful. NASA did not decide to proceed with a rover until May 1969, as Apollo 10, the dress rehearsal for the Moon landing, made its way home from lunar orbit. Boeing got the contract for three rovers on a cost plus basis; overruns (especially in the navigation system) meant the three vehicles eventually cost a total of $40 million. These cost overruns gained considerable media attention at a time of greater public weariness with the space program, when NASA's budget was being cut.
  The Lunar Roving Vehicle could be folded into a space 5 ft by 20 in (1.5 m by 0.5 m). Unloaded, it weighed 460 lb (209 kg) and when carrying two astronauts and their equipment, 1500 lb (700 kg). Each wheel was independently driven by a ¼ horsepower (200 W) electric motor. Although it could be driven by either astronaut, the commander always drove. Travelling at speeds up to 6 to 8 mph (10 to 12 km/h), it meant that for the first time the astronauts could travel far afield from their lander and still have enough time to do some scientific experiments. The Apollo 15 rover bore a plaque, reading: "Man's First Wheels on the Moon, Delivered by Falcon, July 30, 1971".  During pre-launch testing, the LRV was given additional bracing, lest it collapse if someone sat on it under Earth conditions.
caption: Irwin with the LRV on the Moon
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