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Infographic: Out-of-this-World Electric Vehicle Records

Nasa-Curiosity
While Apollo 17 astronauts Eugene Cernan and Harrison Schmitt visited Earth’s moon for three days in December 1972, they drove their mission’s Lunar Roving Electric Vehicle 19.3 nautical miles (22.210 statute miles or 35.744 kilometers).

That was the farthest total distance for any NASA electric vehicle driving on a world other than Earth until Thursday.

The team operating NASA’s Mars Exploration Rover Opportunity received confirmation in a transmission from Mars that the rover drove 263 feet (80 meters) on Thursday, bringing Opportunity’s total odometry since landing on Mars in January 2004 to 22.220 statute miles (35.760 kilometers).

The international record for driving distance on another world is still held by the Soviet Union’s remote-controlled Lunokhod 2 electric rover, which traveled 23 miles (37 kilometers) on the surface of Earth’s moon in 1973.

Opportunity began a multi-week trek this week from an area where it has been working since mid-2011, the “Cape York” segment of the rim of Endeavour Crater, to an area about 1.4 miles (2.2 kilometers) away, “Solander Point.”

Most electric vehicles on the road today rely on li-ion batteries, which must be plugged in and recharged on a regular basis. Mars rovers are millions of miles from the nearest electrical outlets or charging station, so they take a different tack.

The 25-lb. (11.5 kilograms) Sojourner generated electricity using solar arrays, with a set of three small, nonrechargeable lithium-thionyl chloride batteries serving as backup.

The much larger Spirit and Opportunity also rely primarily on solar panels and rechargeable lithium-ion batteries to store power for times when the sun isn’t shining.

Curiosity, on the other hand, is powered by a radioisotope thermoelectric generator (RTG), which converts the heat generated by the radioactive decay of plutonium-238 into electricity. RTGs have powered many NASA deep-space probes over the decades, including the twin Voyager spacecraft, which are knocking on the door of interstellar space.

The infographic below illustrates comparisons among the distances driven by various wheeled vehicles on the surface of Earth’s moon and Mars.

Out-of-this-World-Records
[source: NASA, Space.com]

May 19, 2013Blagojce Krivevski
Worldwide Capacity of Lithium-Ion Batteries for EVs Will Multiply More than 10-Fold by 2020Annual Sales of Electric Motorcycles and Scooters in North America Will Multiply Nearly Ten-Fold by 2018
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Blagojce Krivevski

Blagojce Krivevski is physicist and green technology lover. Keep in touch with Blagojce through his email, web site, Twitter, Linkedin, Facebook and Google+.

May 19, 2013 Electric Car Newselectric rover, electric vehicle, MARS electric rover, NASA electric rover, Nasa Electric Vehicles. Electric Vehicles
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