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80 votes
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What if Apollo Lunar Rover failed on the Moon?

The track for the Lunar Rover was planned not to exceed the maximum walking distance back to the LM. The astronauts could drive away from the LM to the maximum distance and then drive a circle around ...
Uwe's user avatar
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69 votes
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How (the heck) did Lunokhod 2 drive, navigate and survive a ~40 kilometer drive over four months on the Moon using 1970's technology?

A few interesting videos about the lunokhod rovers: Tank on the Moon The Lunokhod Rovers - It Happened in Space #7 Secret Soviet Lunar Rovers and Extra Terrestrial Cars - Lunokhod, Mars Rovers The ...
Fred's user avatar
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38 votes

How was the Apollo lunar liftoff video transmitted to Earth?

The Lunar Roving Vehicle had a high-gain antenna on it, and the camera signal was sent to Earth directly from it. There's a lot of information about it on this page. The antenna was used for both ...
Russell Borogove's user avatar
23 votes
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How did the Apollo Lunar Rover navigation system computer work?

The rover computer was an analog/digital hybrid system called the Signal Processor Unit (SPU). As explained in answers to this question How did astronauts navigate the Lunar Roving Vehicle (LRV) over ...
Organic Marble's user avatar
23 votes

Can I borrow a lunar rover?

NASA would prefer that you please contact them first. NASA-USG_LUNAR_HISTORIC_SITES_RevA-508 A4-1 PHYSICAL CONTACT RECOMMENDATION: Visitors should not physically contact any USG ...
Konchog's user avatar
  • 331
23 votes
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Why do the more recent landers across Mars and Moon not use the cushion approach?

Propulsive landing is now a proven technology and a factor of 1,000 more accurate. According to NASA Facts; Mars Exploration Rover: With the heat-shield portion of the aeroshell pointed forward, the ...
uhoh's user avatar
  • 149k
16 votes

Why do the more recent landers across Mars and Moon not use the cushion approach?

The 2007 paper The challenges of landing on Mars gives a decent introduction to the subject, and the evolution of Mars landing methods. First generation: Viking. Propulsive landing, lander on legs. ...
Hobbes's user avatar
  • 128k
15 votes
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Was the Apollo lunar rover ever "airborne"?

The videographer says yes! This photo is described by NASA as: The Lunar Roving Vehicle (LRV) gets a speed workout by astronaut John W. Young in the "Grand Prix" run during the first Apollo ...
Camille Goudeseune's user avatar
14 votes
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If a car or train freely drove on flat terrain on the Moon, would it eventually be stopped by something?

It still has the resistance of terrain against wheels (well, weaker than comparable terrain on Earth due to lower gravity - but then the terrain is pretty awful for driving), the same friction of ...
SF.'s user avatar
  • 55k
11 votes
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Embedding foundations from low lunar orbit?

Putting it bluntly, I don't like your idea. In addition to needing accuracy and precision from afar and all the problems associated with that, as mentioned in the answer by @Nuclear_Hogie, I get the ...
Fred's user avatar
  • 13.1k
10 votes

Lunar rover footage?

There were 2 cameras on the LRV: a 16 mm film camera and a TV camera. The TV camera was connected to a transmitter which sent images directly to Earth via the high-gain antenna. This meant the camera ...
Hobbes's user avatar
  • 128k
10 votes

Cost of lunar rover - Apollo 15

Even if the number you quote is correct, I believe that is the cost of the entire rover program. That not only includes the cost of the 4 rovers built, but the cost to develop and test them, plus all ...
mhoran_psprep's user avatar
9 votes

Embedding foundations from low lunar orbit?

Accurately landing something on the moon is tricky business. Even performing a controlled landing within several hundred meters of your target is a noteworthy achievement. Dropping pylons from orbit ...
Nuclear Hoagie's user avatar
9 votes
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Apollo 15: when did the astronauts manually move the LRV?

I ended up getting in touch with the Apollo Lunar Surface Journal folks. Of all the events happening near the ALSEP site, the one that best matches this description is when they try to park the LRV ...
olamarre's user avatar
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9 votes
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Reasons why the Lunar Rover DID NOT become "a jumble of loosely assembled broken parts on Launch"?

Let's see what was needed to make sure the LRV didn't disintegrate during launch. These are the same requirements that apply to the rest of the Saturn V stack, by the way. You have to know what the ...
Hobbes's user avatar
  • 128k
7 votes
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Other than Surveyor 3, were any landers within rover distance of Apollo?

A first look at: Moon Landings on Moon Map shows: beside Apollo 12 and Surveyor 3 there is just one candiate: Apollo 11. Apollo 11 is near Surveyor 5 and Ranger 8. Have a quick google check for S5: ...
CallMeTom's user avatar
  • 3,298
7 votes

How did astronauts navigate the Lunar Roving Vehicle (LRV) over the surface of the Moon?

There were "odometers" on all 4 wheels, which did use magnetic sensors to generate 9 pulses for each wheel's revolution. That pulse data was used for calculating distance traveled and speed based on ...
Ron Creel's user avatar
6 votes

What was it actually like driving the Lunokhod lunar rovers live from the ground? What were some of the biggest challenges?

With the difficulties of driving Lunokhod 1, Lunokhod 2 had improvements: the camera used for driving was mounted higher, to give a better field of view and the camera frame rate was 3 seconds ...
Fred's user avatar
  • 13.1k
6 votes

Other than rockets, have internal combustion engines run in space?

With the clarification, then yes, "internal combustion engines" (ICE) as defined in the question have flown in space over 100 times. Each space shuttle orbiter had three of these ICE ...
Organic Marble's user avatar
5 votes

What was it actually like driving the Lunokhod lunar rovers live from the ground? What were some of the biggest challenges?

The Lunokhod crew lived and worked according to the schedule that was determined by the visibility of the Moon from the Crimea. One of the drivers, V. Dovgan, wrote a detailed memoir about how it was. ...
A. Rumlin's user avatar
  • 7,863
5 votes

If a car or train freely drove on flat terrain on the Moon, would it eventually be stopped by something?

Cars and also lunar rovers are slowed down by wheel bearing fricition and rolling resistance of the wheels on the ground. The rolling resistance of the wheels is reduced by a perfectly flat terrain ...
Uwe's user avatar
  • 49k
5 votes

Embedding foundations from low lunar orbit?

This is an idea that has had some investigation and could work, but probably not for a high-precision device like a telescope. See Weiss & Yung, 2010 for a feasibility study on deploying a (lunar) ...
Infinite_Maelstrom's user avatar
5 votes

Reasons why the Lunar Rover DID NOT become "a jumble of loosely assembled broken parts on Launch"?

Because the lunar rover was well packed up. See the simulated unpacking below. In any case the rover was designed from the ground up to survive launch, unlike other ...
PearsonArtPhoto's user avatar
  • 121k
5 votes

Embedding foundations from low lunar orbit?

The technique is popular for anchoring structures in deep water engineering. See for example torpedo pile, and similar. The problems I see are the hardness of lunar regolith compared to marine ...
user52543's user avatar
4 votes
Accepted

What was NASA's “LUROVA” Operational Thermal Computer Model analog or digital? How were capacitors used?

I emailed Ron Creel, the author of LUROVA, and he was nice enough to get back with an answer. (The email address shown in the presentation linked in the question is obsolete, but it wasn't hard to ...
Organic Marble's user avatar
4 votes

Embedding foundations from low lunar orbit?

I see a critical problem here: Before you go embedding pylons in the ground you have a geologist check out what you're embedding them into. This is going to be an extra severe problem because you're ...
Loren Pechtel's user avatar
4 votes
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Were there backup routes planned for the Apollo LRV?

There were no back-up routes. Basically, they went along as they saw fit. You can find the mission rules on the Apollo Lunar Surface Journal. Unfortunately, only the one for Apollo 16 is complete with ...
Ludo's user avatar
  • 14.4k
3 votes
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Were the Apollo astronauts constrained in how they could set their PLSS cooling?

The PLSS doesn't have fine control over cooling. It has three settings: minimum (circulate water at 75-80 degrees F), intermediate (circulate water at 60-65 degrees F), and maximum (circulate water ...
Mark's user avatar
  • 15.3k
3 votes
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Could the Lunar Rover jump start the Lunar Module in an emergency?

I don't think that cable is for power. Before launching from the moon, the explosive device (ED) subsystem performs three tasks: The ascent stage propellants are pressurized. Like all other LM ...
DrSheldon's user avatar
  • 48k
3 votes

Lunar rover footage?

Here Is the main rover footage. Its about 1.5 hours. However it doesn't contain any dust, rooster tail or any complicated particle physics. The only dust cloud or rooster tail footage is the few ...
user26229's user avatar

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