4th leg in the trek to Endeavour, After science stop @ Kasos |
4th leg in the trek to Endeavour, After science stop @ Kasos |
May 20 2009, 08:25 AM
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#1
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
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Jun 7 2009, 04:48 PM
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#2
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
> the next resting period ...
Is it at that outcrop 200m to the south? |
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Jun 7 2009, 05:17 PM
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#3
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
> the next resting period ... Is it at that outcrop 200m to the south? No, I think we will stop at the end of the next drive. Wherever that might be. 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 8 2009, 02:01 AM
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#4
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Member Group: Members Posts: 128 Joined: 28-October 08 From: Boston, MA Member No.: 4469 |
No, I think we will stop at the end of the next drive. Wherever that might be. What is the reasoning behind this? Is it due to excessive concern over the RF wheel currents, or because the future path alternatives diverge at this point? The reason I ask is that I would have thought it a priority to reach bedrock before stopping for any length of time (to maximize the science return during the rest). Mike |
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Jun 8 2009, 02:28 AM
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#5
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
What is the reasoning behind this? Is it due to excessive concern over the RF wheel currents, or because the future path alternatives diverge at this point? The reason I ask is that I would have thought it a priority to reach bedrock before stopping for any length of time (to maximize the science return during the rest). Mike The only thing that helped reducing the RF current now seems to be resting for a week or two. The higher wheel currents indicate that the motor is subject to more mechanical resistance. I have not been following MER-B closely but was told that the nearest bedrock is about 200m away. At the current rate that would be about one week of driving. 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 9 2009, 02:36 PM
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#6
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Member Group: Members Posts: 279 Joined: 19-August 07 Member No.: 3299 |
The higher wheel currents indicate that the motor is subject to more mechanical resistance. I am suppossing that by driving on bedrock, the wheels traction will require less mechanical resistance than over the sand. Is there any difference of wheel currents between bedrock and sand? |
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Jun 9 2009, 03:11 PM
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#7
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Member Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
I am suppossing that by driving on bedrock, the wheels traction will require less mechanical resistance than over the sand. Is there any difference of wheel currents between bedrock and sand? The RF currents drop to almost nominal (~50% reduction) on bedrock but all other wheels change only a slight amount (10% reduction). 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 9 2009, 08:56 PM
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#8
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
The RF currents drop to almost nominal (~50% reduction) on bedrock Paolo Ah, this is very encouraging ! suggesting the RF problem will be greatly alleviated once we reach the firmer "parking-lot" type of terrain about 2 kms ahead (which is expected to be similar in driveability to the "easy" ground between Eagle and Endurance) ... so it sure is the most sensible approach to drive defensively in order to reach the "parking lot" with an intact RF |
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