IPB

Welcome Guest ( Log In | Register )

48 Pages V  « < 46 47 48  
Reply to this topicStart new topic
InSight Surface Operations, 26 Nov 2018-
atomoid
post Oct 7 2019, 09:17 PM
Post #706


Member
***

Group: Members
Posts: 782
Joined: 15-March 05
From: Santa Cruz, CA
Member No.: 196



Since the arm is only able to 'hold position' and not 'push', I had assumed the mole would be 'pinned' to the side of the hole then the arm locked with little if any tension when the hammering commences, in which case i would suspect that little torque to be released early in the hammering process as the sands reorganize to accommodate the mole's new vector, however, unless they are indeed able to set up a high-torque configuration with the arm, it seems they may instead be setting up the timing of the arm movement to coincide along with the hammering and as a result the arm is going to keep tension throughout the pinning operation, enough tension that they are concerned about the magnitude of such forces:
QUOTE
The number of commanded hammer strokes has been limited to 20. The concern is that the pinned Mole could proceed quite rapidly and make the five centimetres it is sticking out of the ground in only a few hammer strokes. That might cause the scoop to hit and damage the measuring tether coming out of the top of the Mole. We here at DLR have used performance data for the Mole from laboratory measurements to determine that, in the best (or worst) case, it would take the Mole eight strokes to make four centimetres. As this was thought to be overly conservative, and it was feared that the Mole might not make any noticeable progress, the team settled on 20 strokes.
Go to the top of the page
 
+Quote Post
fredk
post Oct 9 2019, 02:47 PM
Post #707


Senior Member
****

Group: Members
Posts: 3945
Joined: 17-January 05
Member No.: 152



Some movement on 308 - our first direct look at hammering on Mars:
Attached Image

This spans about 5 minutes.
Go to the top of the page
 
+Quote Post
stevesliva
post Oct 9 2019, 04:04 PM
Post #708


Senior Member
****

Group: Members
Posts: 1404
Joined: 14-October 05
From: Vermont
Member No.: 530



Down a little and precessed a little?
Go to the top of the page
 
+Quote Post
James Sorenson
post Oct 9 2019, 04:36 PM
Post #709


Member
***

Group: Members
Posts: 649
Joined: 21-December 07
From: Clatskanie, Oregon
Member No.: 3988



How about move the scoop away from it and just see what it does? That is one step that appears to have been skipped after they moved the support structure.
Go to the top of the page
 
+Quote Post
PaulH51
post Oct 9 2019, 09:01 PM
Post #710


Senior Member
****

Group: Members
Posts: 1751
Joined: 30-January 13
From: Penang, Malaysia.
Member No.: 6853



Here's a stabilised GIF from @AstroMelina


Attached Image
Go to the top of the page
 
+Quote Post
paraisosdelsiste...
post Yesterday, 08:13 AM
Post #711


Member
***

Group: Members
Posts: 103
Joined: 20-August 12
From: Spain
Member No.: 6597



Seems like there are some hopefully good advances in the HP3 hammering. This animation shows the movement of the mole as of yesterday, 12th of October, during six minutes.

Attached Image
Go to the top of the page
 
+Quote Post
JRehling
post Yesterday, 05:46 PM
Post #712


Senior Member
****

Group: Members
Posts: 2183
Joined: 20-April 05
Member No.: 321



Fun video. ~3 cm down, 3 m to go?
Go to the top of the page
 
+Quote Post

48 Pages V  « < 46 47 48
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 14th October 2019 - 11:51 AM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.