Getting Unstuck in West Valley |
Getting Unstuck in West Valley |
Jun 28 2009, 03:40 AM
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#511
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Senior Member Group: Members Posts: 1229 Joined: 24-December 05 From: The blue one in between the yellow and red ones. Member No.: 618 |
Paolo, throw it in reverse, and gun it.
-------------------- My Grandpa goes to Mars every day and all I get are these lousy T-shirts!
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Jun 28 2009, 07:17 AM
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#512
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
Paolo, throw it in reverse, and gun it. Question: how do you "gun" a vehicle that moves at a speed that is 100s of times slower than a 2CV? Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Jun 28 2009, 04:23 PM
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#513
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Member Group: Members Posts: 530 Joined: 21-March 06 From: Canada Member No.: 721 |
Also, which way do you mean by reverse? Spirit travels normally in reverse, so does throwing it in reverse mean go forward, which is really backward, or go backward, which is forward? Things would have been so much simpler had a rear wheel broken.
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Jun 29 2009, 03:21 AM
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#514
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
... Things would have been so much simpler had a rear wheel broken. Actually I am grateful that it is the RF wheel that is broken. From my testing in the sandbox, if you had to lose one wheel either the LF or the RF are less problematic. Any other combination can cause the bogie to lift one of the active wheels and therefore lose more traction. Suppose you lose the RM while all other wheels are working, when you drive forward, it would be likely that the RR wheel would come up now you have only one active wheel on the right side. If you lost the RR, when you are driving backwards you would lift the RM. With the loss of the RF you can drive backwards or forwards and "wheelies" are only a rare occurrence. Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Guest_PhilCo126_* |
Jun 29 2009, 07:47 AM
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#515
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Guests |
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Jun 29 2009, 09:14 AM
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#516
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Senior Member Group: Members Posts: 1073 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
What a title Not space junk yet http://www.physorg.com/news165402360.html ... And in the worst case in which Spirit cannot move any more and thus is becoming a stationary rover, it will do a much better science with its advanced optics and camera than the Viking landers ! We will be inventive and use Spirit to monitor Mars during long periods (providing we have a minimum budget). For example, just imagine making a 24hrs panoramic movie with the navcams showing moving shadows during the day and even moving stars and satellites at night in the Martian Sky ! "A Day on Mars" movie !!! |
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Jun 29 2009, 01:42 PM
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#517
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Forum Contributor Group: Members Posts: 1372 Joined: 8-February 04 From: North East Florida, USA. Member No.: 11 |
Slabs of space junk indeed. That reporter needs a rocket up his behind.......
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Jun 29 2009, 02:50 PM
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#518
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Junior Member Group: Members Posts: 57 Joined: 22-March 09 From: West Hartford, Connecicut Member No.: 4691 |
What a title Not space junk yet http://www.physorg.com/news165402360.html I would like the reporter to define "space junk" |
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Jun 29 2009, 03:42 PM
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#519
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Member Group: Members Posts: 128 Joined: 28-October 08 From: Boston, MA Member No.: 4469 |
Just a writer taking creative liberties. The article is really not so negative. The "space junk" reference isn't so much a dig as a metaphor to underscore the mission's longevity and success.
BTW, is anyone else irritated by the constant reiteration that Endeavor is "twenty times larger than Victoria"? That really understates the difference in scale. Craters are not one-dimensional; you can't use a linear basis for comparison. They should be using the areas (about 300x larger) or volumes (about 1200x) for comparison. I think your average person (myself included) would find the 300x figure to be the most visually intuitive. |
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Jun 29 2009, 04:40 PM
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#520
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
I would like the reporter to define "space junk" That's easy: any area on the screen or on printed paper (space) containing inane words (junk). Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Jun 29 2009, 05:09 PM
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#521
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Senior Member Group: Members Posts: 1281 Joined: 18-December 04 From: San Diego, CA Member No.: 124 |
Any other combination can cause the bogie to lift one of the active wheels and therefore lose more traction. This is the first time I have heard of any weakness in the rocker bogie system.... interesting. -------------------- Lyford Rome
"Zis is not nuts, zis is super-nuts!" Mathematician Richard Courant on viewing an Orion test |
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Jun 29 2009, 07:02 PM
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#522
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Senior Member Group: Members Posts: 2173 Joined: 28-December 04 From: Florida, USA Member No.: 132 |
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Jun 30 2009, 05:35 AM
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#523
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
This is the first time I have heard of any weakness in the rocker bogie system.... interesting. But it is a graceful degradation. Any system when brought outside the design parameters will break down. The fact we can still drive Spirit is testimony that the R/B system is quite good! Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Jun 30 2009, 05:41 AM
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#524
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
I also wanted to let you know that today at around 4:40pm we mixed and leid down the last batch of clay/diatomaceous earth mix for a grand total of 5400lbs. Tomorrow morning, while media will be watching, we will roll down the rover in the sandbox. Hopefully this is the right mix and the rover will not simply be swallowed by the sandbox ;-)
Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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Jun 30 2009, 06:01 AM
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#525
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Member Group: Members Posts: 239 Joined: 18-December 07 From: New York Member No.: 3982 |
Tomorrow morning, while media will be watching, we will roll down the rover in the sandbox. Hopefully this is the right mix and the rover will not simply be swallowed by the sandbox ;-) Paolo That takes guts doing it in front of the media. Remember what happened to Geraldo Rivera. |
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