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, 07:21 PM
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#3
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
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? Well you can read how SS phrased it in the April 17 2005 update on his blog. He isn't particularly explicit about what happens below that level just that "We think that the rovers can't survive at power levels much lower than 280 watt-hours". There have been other comments from the team to the rovers dying when power drops below 300whr but I can't find them at the moment. There has already been some discussion on this in the Oppy Vs Spirit Power Consumption thread. Any additional insight would be welcome. |
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