Winter campaign at Cook Haven, Sol 3512 - 3599 (December 13, 2013 - March 10, 2014) |
Winter campaign at Cook Haven, Sol 3512 - 3599 (December 13, 2013 - March 10, 2014) |
Dec 13 2013, 04:31 AM
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#1
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
She's there! Opportunity drove down to the "Cook Haven" bright outcrops on Sol 3512.
Even better, news via Twitter that currents on the front right wheel are back to normal. Phew. |
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Jan 21 2014, 07:51 PM
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#2
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
IMHO, I can't visualize a tiddlywink or leveraged snap-effect scenario really having enough rebound to push a rock more than a few cm, and though I might be completely wrong, this rock seems so crumbly its hard to see much stress building up.
While still somewhat far-fetched, though still seems most feasible to me (and I still don't know if the wheel configuration and maneuvers support it, because it requires the wheel to be upslope for the 'catch' and downslope for the 'release'), is the wheel abutting against the PI source and dislodging it so that it becomes deposited inside the interior of the wheel. At this point when the wheel turns, since PI would lie flat as a sort of hemi-square wheel shape, it should, as the wheel turns slowly, usually become rotated to a near vertical orientation inside the wheel and so as the angle of lean transfers to the tip-over point, it could either be re-deposited back inside the wheel for another rotation, or if its on the edge of the wheel in the right configuration, can escape in that vertical orientation, and may accumulate some extra height if it hangs on long enough. So then if the part of PI that then contacts the ground is not the square half, but is the roundish half, and the ground has enough slope to it (a 15 degree slope isn't quite trivial), PI may gain enough speed from that small drop to roll several revolutions until the square sections stall it to flop over into its current location. |
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