Spring at Cape York, Sol 2947 (after Greeley Haven) - sol 3040 |
Spring at Cape York, Sol 2947 (after Greeley Haven) - sol 3040 |
![]()
Post
#1
|
||
Solar System Cartographer ![]() ![]() ![]() ![]() Group: Members Posts: 10193 Joined: 5-April 05 From: Canada Member No.: 227 ![]() |
Time for a new topic, I think.
A bit of monkey business with the FHAZ from 2952 shows the nature of the latest drive. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
|
|
||
![]() |
![]()
Post
#2
|
|
Member ![]() ![]() ![]() Group: Members Posts: 915 Joined: 4-September 06 From: Boston Member No.: 1102 ![]() |
Does anyone know if the WHEELS have magnetic or ball bearings? Is it the bearings that usually fail, or some other component?
-------------------- |
|
|
![]()
Post
#3
|
|
![]() Member ![]() ![]() ![]() Group: Admin Posts: 976 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 ![]() |
Does anyone know if the WHEELS have magnetic or ball bearings? Is it the bearings that usually fail, or some other component? If you are asking about the reaction wheels on ODY, I have no idea, on MER drive/steer actuators they have bearings and magnetic detents. In Oppy's RF steering actuator it is believed that the magnetic detent came loose and prevents motion, while in Oppy's IDD Az actuator we have reasons to believe it is one of the windings that is no longer operational. In Spirit's RF and RR drive actuator it is less clear but the best explanation I have heard is that there is some kind of deposit on the commutators which prevent current to flow through the windings. 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.
|
|
|
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 16th June 2024 - 05:52 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE 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 funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |
![]() |