Timeline for Curiosity wheel damage
Current License: CC BY-SA 3.0
14 events
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| S Aug 27, 2016 at 21:32 | history | suggested | Peter Mortensen | CC BY-SA 3.0 |
Copy (e.g. ref. <http://english.stackexchange.com/questions/15953>, <https://en.wikipedia.org/wiki/Kevlar>, and <https://en.wikipedia.org/wiki/Morse_code>). (its = possessive, it's = "it is" or "it has". See for example <http://www.wikihow.com/Use-Its-and-It%27s>.)
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| Aug 27, 2016 at 20:14 | review | Suggested edits | |||
| S Aug 27, 2016 at 21:32 | |||||
| Dec 26, 2015 at 9:41 | comment | added | predatflaps | yes sorry i didn't consider that. The performance of aluminium would be different on mars even more brittle. For aircraft grade Alu, I know that you can saw it faster than a strong oak using the same saw. Cable reinforced rubber and the materials that Darpa has developed are so wonderful, it seems avant garde to use Aluminium as an abrasion/knocking element of the craft. | |
| Dec 26, 2015 at 9:17 | comment | added | Mark | I've worked with 2mm aluminum as well, and it really depends on your alloy -- nobody uses pure aluminum for engineering purposes. As for rubber, at Martian temperatures it becomes brittle, and you risk shattering your wheels the first time you hit a serious bump. | |
| Dec 26, 2015 at 9:14 | history | edited | predatflaps | CC BY-SA 3.0 |
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| Dec 26, 2015 at 6:52 | history | edited | predatflaps | CC BY-SA 3.0 |
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| Dec 26, 2015 at 6:47 | history | edited | predatflaps | CC BY-SA 3.0 |
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| Dec 26, 2015 at 6:38 | comment | added | predatflaps | I figure that NASA had so many pre-launch tests to do it didn't physically test the wheels like Pirelli wheels are tested for 50/100km, It can't have done tests in moderately rocky surface, the design was focused on the JPL morse code chevron traction system to ensure good traction and not slipping laterally on slopes. The rover weighs 300 kilos in earth weight and has 6 wheels, so in a rocky scenario it's supporting 300 kilos on reduced area of an aluminium drum. | |
| Dec 26, 2015 at 6:18 | comment | added | predatflaps | Oh yes good point. I don't know what to say about that. I have worked with 2mm aluminium previously, it's somewhere in between steel and plasticine, it dents very easily, you can almost score it with chalk and wood. You could reshape the Curiosity rover wheels with your hands if they were not reinforced. I don't know how to measure the .75mm wheel VS gravity. Space rover wheels are a new science, no one had to make any lighweight weels previously. | |
| Dec 26, 2015 at 6:10 | review | Late answers | |||
| Dec 26, 2015 at 7:08 | |||||
| Dec 26, 2015 at 6:02 | comment | added | Nathan Tuggy | It's just possible that the reason "Here on earth no one would ever use .75mm Alu for a volcano/desert rover to do 50km" is because Earth has three times the gravity, so you should probably adjust that to be clearer that (in your view) even 2.25mm Al would be unsatisfactory on Earth. | |
| Dec 26, 2015 at 6:00 | history | edited | predatflaps | CC BY-SA 3.0 |
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| Dec 26, 2015 at 5:56 | review | First posts | |||
| Dec 26, 2015 at 6:02 | |||||
| Dec 26, 2015 at 5:53 | history | answered | predatflaps | CC BY-SA 3.0 |