InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
Nov 26 2018, 08:20 PM
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#1
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Congratulations to the InSight team on a successful landing! We'll discuss the remainder of the mission here.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Sep 26 2020, 10:51 PM
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#2
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
They are obviously aware of the risks. But it seems to be the risk of damaging the teather with the scoop:
QUOTE ...I have already mentioned that the placement of the scoop is risky and must be done with millimetre accuracy... In a slightly different context, they say that the force should be about 7 N: QUOTE The force should be enough to offset the hammer mechanism's recoil of about seven newtons. I presume that this is considerable more than the friction between a layer of a few centimeters of sand and a smooth teather as long as there are no perpendicular forces in the same order of magnitude. The friction force induced between sand and teather by pushing the scoop will push the teather downward, too. So, the upward motion of the mole might be the result of the elastic reactio of the phase boundary between loose sand and the suggested "duricrust" on hammering, not necessarily just the recoil of the hammering mechanism. |
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