MSL Video |
MSL Video |
Nov 23 2006, 06:56 PM
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#46
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Member Group: Members Posts: 688 Joined: 20-April 05 From: Sweden Member No.: 273 |
The cord cutting event does look awfully risky when you see it on video but it's not significantly different to the risk associated with blowing the backshell\heatshield and the hundreds of other exquisitely choreographed events that are needed for any lander to get to the surface safely. I agree. In Aerospace applications whenever You have a one-time event that absolutely has to work (typically escape or emergency systems) pyrotechnics are normally the system of choice. They are extremely reliable, degrade very slowly and act instantly. tty |
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Nov 24 2006, 11:59 AM
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#47
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
they often have duplicate circuits for really critical pyrotechnics. Duplicate pyros, wiring, everything.
It's extraordinarily rare for pyros to fail to fire. Last time I remember that happening, they put one large sat on a ?Titan? built for two, and wired the spacecraft separation to the wrong pyro-lines. When the booster control sent the separation command, it went down the wires to the non-existent pyros to separate the nonexistant second sat. That was the last one the Shuttle rescued before they stopped doing that sort of thing. |
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Nov 25 2006, 01:22 AM
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#48
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Member Group: Members Posts: 200 Joined: 20-November 05 From: Mare Desiderii Member No.: 563 |
It's going to be funny to look back and see rover tracks just starting from nowhere. Hadn't occurred to me before.
(I guess we might get a bit of a mark from the rockets?) |
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Nov 25 2006, 01:36 AM
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#49
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Member Group: Members Posts: 477 Joined: 2-March 05 Member No.: 180 |
QUOTE The cord cutting event does look awfully risky when you see it on video but it's not significantly different to the risk associated with blowing the backshell\heatshield and the hundreds of other exquisitely choreographed events that are needed for any lander to get to the surface safely. Exactly. The MERs could have been killed by any number of other things too. Maybe the bolts wouldn't have blown to set the rovers free of the landers. Maybe the solar panel wings wouldn't have deployed, so the rovers would have been as good as dead anyway. All kinds of things can go wrong, many of which could end the mission before it begins. You just have to hope that everything goes as planned. I'm sure that when the airbag idea appeared there were also comments regarding the lunacy of the idea... The time is to innovate and...roll! I seem to recall something from a documentary about the MERs that was to this effect, that a lot of people thought that airbags would never stand a chance of working. So I think you're right. |
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Mar 16 2007, 02:49 AM
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#50
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Newbie Group: Members Posts: 5 Joined: 21-November 06 Member No.: 1380 |
A search on youtube for "JPL MSL" came up with this: MSL EDL Animation This MSL EDL video was played tonight on stage at this Kobie Boykins presentation. It was fantastic. The video was longer and extended beyond the YouTube version to include more surface operations. It included a nice segment where the laser ablated a rock and an instrument recorded readings from the "smoke" wafting away and the hole in the rock. Spiffy demonstration. The longer video also depicted a core sampling drill that could be used on rocks or on the "soil". The core sample (depicted from penetrating a rock) was slipped out of the bit and placed INTO the MSL for some unspecified analysis. Very cool. I hope the whole video makes it onto the web soon. Kobie Boykins is a MER solar panel designer. Someone in the audience remarked that the MSL video showed no solar panels. He responded (paraphrased): "No. No solar panels. I'll let you speculate on what its power source is, since I'm not allowed to publicly discuss it yet." |
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Mar 16 2007, 04:24 AM
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#51
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Merciless Robot Group: Admin Posts: 8784 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Hmm...curious, but probably wise for a mass audience.
-------------------- 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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Mar 16 2007, 11:26 AM
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#52
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Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra | Portugal Member No.: 228 |
A search on youtube for "JPL MSL" came up with this: MSL EDL Animation That zooming out in the end, leaving MSL all alone, gives me a chill in the stomach... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!"
Edgar Alan Poe |
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Mar 16 2007, 11:36 AM
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#53
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Member Group: Members Posts: 321 Joined: 6-April 06 From: Cape Canaveral Member No.: 734 |
The longer video also depicted a core sampling drill that could be used on rocks or on the "soil". The core sample (depicted from penetrating a rock) was slipped out of the bit and placed INTO the MSL for some unspecified analysis. Very cool. I hope the whole video makes it onto the web soon. I believe that the corer no longer is part of the mission |
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Mar 16 2007, 11:40 AM
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#54
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
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Mar 16 2007, 11:49 AM
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#55
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Special Cookie Group: Members Posts: 2168 Joined: 6-April 05 From: Sintra | Portugal Member No.: 228 |
Doug...
They're grown up now, our two girls have shown to know how to take care of themselves... -------------------- "Ride, boldly ride," The shade replied, "If you seek for Eldorado!"
Edgar Alan Poe |
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Mar 16 2007, 12:02 PM
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#56
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
Yes!!! More of them 3/4 ton rovers with nuclear power and frickin laser beams attached to their masts!!! Throw me a bone here, I want high definition video, too!!!
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Mar 16 2007, 12:03 PM
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#57
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Member Group: Members Posts: 117 Joined: 7-December 06 From: Sheffield UK Member No.: 1462 |
This MSL EDL video was played tonight on stage at this Kobie Boykins presentation. It was fantastic. The video was longer and extended beyond the YouTube version to include more surface operations. It included a nice segment where the laser ablated a rock and an instrument recorded readings from the "smoke" wafting away and the hole in the rock. Spiffy demonstration. The longer video also depicted a core sampling drill that could be used on rocks or on the "soil". The core sample (depicted from penetrating a rock) was slipped out of the bit and placed INTO the MSL for some unspecified analysis. Very cool. I hope the whole video makes it onto the web soon. Kobie Boykins is a MER solar panel designer. Someone in the audience remarked that the MSL video showed no solar panels. He responded (paraphrased): "No. No solar panels. I'll let you speculate on what its power source is, since I'm not allowed to publicly discuss it yet." Laser sampling of a martian rock and core drilling by MSL are seen as part of the following Sky at Night extended Mars special. They may be from the same simulation as mentioned above and look pretty cool: http://www.bbc.co.uk/science/space/spacegu.../proginfo.shtml -------------------- It's a funny old world - A man's lucky if he gets out of it alive. - W.C. Fields.
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Mar 16 2007, 03:19 PM
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#58
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Member Group: Members Posts: 242 Joined: 21-December 04 Member No.: 127 |
Sure gives a sense of just how radical the Skycrane concept is.
That's got to be the most "science-fictiony" thing I've ever seen bent into metal. |
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Mar 17 2007, 11:51 AM
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#59
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Member Group: Members Posts: 117 Joined: 7-December 06 From: Sheffield UK Member No.: 1462 |
Upon seeing the MSL rover in simulations I'm always struck by just how scorpion-like the thing looks. That inclined rear RTG really gives it a sting in the tail and the whole thing looks quite menacing, like it'd eat Sojourner for breakfast!
-------------------- It's a funny old world - A man's lucky if he gets out of it alive. - W.C. Fields.
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Mar 19 2007, 10:11 AM
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#60
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Member Group: Members Posts: 307 Joined: 16-March 05 Member No.: 198 |
A search on youtube for "JPL MSL" came up with this: MSL EDL Animation Came across this student project version of MSL's EDL sequence on Youtube (done "a few years ago"): Re: MSL EDL. ====== Stephen |
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