Wheel Trouble, ...down to 5 good wheels? |
Wheel Trouble, ...down to 5 good wheels? |
Mar 14 2006, 12:29 AM
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Junior Member Group: Members Posts: 90 Joined: 13-January 05 Member No.: 143 |
I hate to be the bearer of bad news, but I just heard that there is a serious problem with Spirit's right front drive actuator after yestersol's drive. (This is the actuator that had high currents in the past and led to the backward-driving strategy.) It will take awhile to evaluate the situation, but early speculation is grim.
In a worst-case scenario, they can still drag the bum wheel along, but don't expect another summit view. Best-case scenario would be a rock or debris jammed in the wheel. This is a heads-up, sorry I can't really give more info at this time. I still thought you all would like to know. |
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Mar 17 2006, 06:37 PM
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#2
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Junior Member Group: Members Posts: 90 Joined: 13-January 05 Member No.: 143 |
How sure are we of the 280 Whr "death" number? It's hard to believe that Spirit couldn't hunker down with overnight deep sleeps and infrequent comm passes and at least survive with much less than that. Could it be that SS was really talking about a minimum power level for usability, rather than a survival limit?
Edit: Plenty of discussion on this subject in this topic. My impression is that we know a lot more about power availability than about power requirements. |
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Mar 17 2006, 11:44 PM
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#3
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Senior Member Group: Members Posts: 2488 Joined: 17-April 05 From: Glasgow, Scotland, UK Member No.: 239 |
How sure are we of the 280 Whr "death" number? It's hard to believe that Spirit couldn't hunker down with overnight deep sleeps and infrequent comm passes and at least survive with much less than that. Could it be that SS was really talking about a minimum power level for usability, rather than a survival limit? Edit: Plenty of discussion on this subject in this topic. My impression is that we know a lot more about power availability than about power requirements. I think there *are* certain genuine limits, such as with regard to the batteries and the way they get charged/discharged. Certainly, if they get frozen then they'll be damaged, and may take no more charge. That might leave us with a MER which the DSN can ping, but does little else, ie EOM. Bob Shaw -------------------- Remember: Time Flies like the wind - but Fruit Flies like bananas!
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