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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#801
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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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Jan 27 2020, 10:10 PM
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#802
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
I didn't look too much into Phoenix but i think the scoop design may have been different since trenching wasnt a part of the mission, however it may be similar enough that some trenching may be possible, Phoenix apparently able to dug a 18 cm deep trench when checking out the polygons, though i dont know what its maximum reach may have been, physically, as it seems it was thwarted by impassable icy soils. Similar attempts by Insight may be able to do better if the deployment arm dynamics are similar enough, but of course i like guessing.
With incrementally readjusted arm pressure per percussion sequence, the back of the mole should eventually reach level with the surface, at which point it will be necessary to very carefully place the end of the scoop on a portion of the mole end-cap in either a flat or pointed configuration to prevent it from backing out again. In an edge-on configuration it may be possible to drive the end-cap a few cm below soil level where soil can be mounded atop the hole in order to fill the hole as it digs, keeping some pressure atop a portion of the soil mound to encourage infill all the while allowing as free threading of the ribbon as possible, as it seems the only source of friction below surface for a while is going to be in the form of back-filled soils jamming up its backup antics, with those first few cm as critical, once the back of the mole gets deep enough, the increase in friction from the increasing infill should exceed the bounce-back effect, redirecting that energy to digging again, unless it somehow pounds out a hollow sheath within which it will eternally ping-pong... so as usual much easier said than done. |
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