probably nothing important - just an observation
Who else would insist on using archaic Imperial units like miles to measure speed and distance?
Uh, they do their ascent callouts in the metric system (thankfully), and the imperial unit is in the parentheses above so it's clearly of secondary importance. I fail to see how that "proves" his nationality or why that should matter at all in the first place. If anything, the above shows they insist on the metric system.
Time to bump this thread, update:http://www.spacex.com/updates.php
Quote from: corrodedNut on 12/16/2010 12:49 amTime to bump this thread, update:http://www.spacex.com/updates.phpThe updates mentions "splashed less than a mile from the target" which is not 800m, but still pretty impressive for a first flight.
Quote from: stockman on 12/16/2010 10:58 amQuote from: ugordan on 12/16/2010 09:25 amLooking at the video, it is obvious there was roll torque during liftoff again, perhaps as much as in the last flight, but the vehicle immediately countered and rolled back (unlike the last time where it just stopped the roll). Also, after stage sep it looks like the first stage induced a tumble on purpose, probably to aid recovery attempts.I have to respectfully disagree... Unless you are seeing something I am missing in this video I don't see any roll at launch, certainly nothing compared to the almost 90 degree roll the first time..Look carefully at the erector and the right portion of the screen where the sprinklers are in the onboard video, when the vehicle is released. Also, note I specifically said roll torque, not roll. Don't confuse the two. The magnitude of the torque appeared very similar to F9-01. However, as I said the vehicle quickly took action and brought back the roll angle to "null". Looked like 10 degrees or less in roll excursion this time.FWIW, this looks similar to what happened to the first Atlas III. It takes some time to fully characterize a new propulsion unit.
Quote from: ugordan on 12/16/2010 09:25 amLooking at the video, it is obvious there was roll torque during liftoff again, perhaps as much as in the last flight, but the vehicle immediately countered and rolled back (unlike the last time where it just stopped the roll). Also, after stage sep it looks like the first stage induced a tumble on purpose, probably to aid recovery attempts.I have to respectfully disagree... Unless you are seeing something I am missing in this video I don't see any roll at launch, certainly nothing compared to the almost 90 degree roll the first time..
Looking at the video, it is obvious there was roll torque during liftoff again, perhaps as much as in the last flight, but the vehicle immediately countered and rolled back (unlike the last time where it just stopped the roll). Also, after stage sep it looks like the first stage induced a tumble on purpose, probably to aid recovery attempts.
Quote from: ugordan on 12/16/2010 11:03 amQuote from: stockman on 12/16/2010 10:58 amQuote from: ugordan on 12/16/2010 09:25 amLooking at the video, it is obvious there was roll torque during liftoff again, perhaps as much as in the last flight, but the vehicle immediately countered and rolled back (unlike the last time where it just stopped the roll). Also, after stage sep it looks like the first stage induced a tumble on purpose, probably to aid recovery attempts.I have to respectfully disagree... Unless you are seeing something I am missing in this video I don't see any roll at launch, certainly nothing compared to the almost 90 degree roll the first time..Look carefully at the erector and the right portion of the screen where the sprinklers are in the onboard video, when the vehicle is released. Also, note I specifically said roll torque, not roll. Don't confuse the two. The magnitude of the torque appeared very similar to F9-01. However, as I said the vehicle quickly took action and brought back the roll angle to "null". Looked like 10 degrees or less in roll excursion this time.FWIW, this looks similar to what happened to the first Atlas III. It takes some time to fully characterize a new propulsion unit.I dunno... I've looked at the HD footage (in the video SpaceX released) as well now many times. I just don't see any torque-induced roll at liftoff, no matter how close I look. Sure, if you concentrate on the flame-trench sprinklers only there might be a hint of a wobble or quick rotation, but that video feed part is really poor quality and the image wobbles back and forth before and after that due to A) transmission interference and B) compression artifacts on top of that. It just isn't enough info to tell for sure what is causing that "wobble".When we see other HD closeup footage in the next couple of days, we should be able to determine it with more confidence.
All thrusters working on landing: At the press conference they said that two of the 18 draco thrusters stopped functioning. All thought thats not really a big deal at all, ideally you would like to see them all functional at the end of the mission.
Quote from: FinalFrontier on 12/16/2010 08:33 pmAll thrusters working on landing: At the press conference they said that two of the 18 draco thrusters stopped functioning. All thought thats not really a big deal at all, ideally you would like to see them all functional at the end of the mission. That's not what they said at the press conference. They said all thrusters worked.Now Chris had a source (not sure who) that claimed a Draco thruster failed, but that has not been the official word from SpaceX. Hopefully it will be clarified in the near future.
Quote from: Lars_J on 12/16/2010 08:45 pmQuote from: FinalFrontier on 12/16/2010 08:33 pmAll thrusters working on landing: At the press conference they said that two of the 18 draco thrusters stopped functioning. All thought thats not really a big deal at all, ideally you would like to see them all functional at the end of the mission. That's not what they said at the press conference. They said all thrusters worked.Now Chris had a source (not sure who) that claimed a Draco thruster failed, but that has not been the official word from SpaceX. Hopefully it will be clarified in the near future.I remember hearing over the live webcast feed something about a thruster failing. But it could've been a false negative, or something like that.
I don't remember if it was one or two. It was elon who said it.
